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  • Building Awesome WM

    - by Dragan Chupacabrovic
    Hello, I am following these steps in order to build Awesome window manager on 10.04 I am building 3.4 while the tutorial is for 3.1 I installed all of the specified dependencies including cairo. EDIT I ran: sudo apt-get install libxcb-xtest0-dev libxcb-property1-dev libxdg-basedir-dev libstartup-notification0-dev and now it looks like I'm missing a library Please advise: awesome-3.4$ make Running cmake… -- cat - /bin/cat -- ln - /bin/ln -- grep - /bin/grep -- git - /usr/bin/git -- hostname - /bin/hostname -- gperf - /usr/bin/gperf -- asciidoc - /usr/bin/asciidoc -- xmlto - /usr/bin/xmlto -- gzip - /bin/gzip -- lua - /usr/bin/lua -- luadoc - /usr/bin/luadoc -- convert - /usr/bin/convert -- Configuring lib/naughty.lua -- Configuring lib/awful/tooltip.lua -- Configuring lib/awful/init.lua -- Configuring lib/awful/titlebar.lua -- Configuring lib/awful/key.lua -- Configuring lib/awful/mouse/init.lua -- Configuring lib/awful/mouse/finder.lua -- Configuring lib/awful/autofocus.lua -- Configuring lib/awful/screen.lua -- Configuring lib/awful/rules.lua -- Configuring lib/awful/widget/init.lua -- Configuring lib/awful/widget/taglist.lua -- Configuring lib/awful/widget/graph.lua -- Configuring lib/awful/widget/tasklist.lua -- Configuring lib/awful/widget/common.lua -- Configuring lib/awful/widget/prompt.lua -- Configuring lib/awful/widget/launcher.lua -- Configuring lib/awful/widget/button.lua -- Configuring lib/awful/widget/layoutbox.lua -- Configuring lib/awful/widget/layout/init.lua -- Configuring lib/awful/widget/layout/vertical.lua -- Configuring lib/awful/widget/layout/horizontal.lua -- Configuring lib/awful/widget/layout/default.lua -- Configuring lib/awful/widget/progressbar.lua -- Configuring lib/awful/widget/textclock.lua -- Configuring lib/awful/dbus.lua -- Configuring lib/awful/remote.lua -- Configuring lib/awful/client.lua -- Configuring lib/awful/prompt.lua -- Configuring lib/awful/completion.lua -- Configuring lib/awful/tag.lua -- Configuring lib/awful/util.lua -- Configuring lib/awful/button.lua -- Configuring lib/awful/menu.lua -- Configuring lib/awful/hooks.lua -- Configuring lib/awful/wibox.lua -- Configuring lib/awful/layout/init.lua -- Configuring lib/awful/layout/suit/init.lua -- Configuring lib/awful/layout/suit/floating.lua -- Configuring lib/awful/layout/suit/fair.lua -- Configuring lib/awful/layout/suit/spiral.lua -- Configuring lib/awful/layout/suit/magnifier.lua -- Configuring lib/awful/layout/suit/tile.lua -- Configuring lib/awful/layout/suit/max.lua -- Configuring lib/awful/placement.lua -- Configuring lib/awful/startup_notification.lua -- Configuring lib/beautiful.lua -- Configuring themes/zenburn//theme.lua -- Configuring themes/default//theme.lua -- Configuring themes/sky//theme.lua -- Configuring config.h -- Configuring awesomerc.lua -- Configuring awesome-version-internal.h -- Configuring awesome.doxygen -- Configuring done -- Generating done -- Build files have been written to: /home/druden/util/awesome-3.4/.build-vedroid-i486-linux-gnu-4.4.3 Running make Makefile… Building… [ 4%] Built target generated_sources [ 5%] Building C object CMakeFiles/awesome.dir/awesome.c.o In file included from /home/druden/util/awesome-3.4/spawn.h:25, from /home/druden/util/awesome-3.4/awesome.c:33: /home/druden/util/awesome-3.4/globalconf.h:57: error: expected specifier-qualifier-list before ‘xcb_event_handlers_t’ In file included from /home/druden/util/awesome-3.4/awesome.c:34: /home/druden/util/awesome-3.4/client.h: In function ‘client_stack’: /home/druden/util/awesome-3.4/client.h:212: error: ‘awesome_t’ has no member named ‘client_need_stack_refresh’ /home/druden/util/awesome-3.4/client.h: In function ‘client_raise’: /home/druden/util/awesome-3.4/client.h:227: error: ‘awesome_t’ has no member named ‘stack’ In file included from /home/druden/util/awesome-3.4/awesome.c:42: /home/druden/util/awesome-3.4/titlebar.h: In function ‘titlebar_update_geometry’: /home/druden/util/awesome-3.4/titlebar.h:150: error: ‘awesome_t’ has no member named ‘L’ /home/druden/util/awesome-3.4/titlebar.h:151: error: ‘awesome_t’ has no member named ‘L’ /home/druden/util/awesome-3.4/titlebar.h:152: error: ‘awesome_t’ has no member named ‘L’ In file included from /home/druden/util/awesome-3.4/awesome.c:47: /home/druden/util/awesome-3.4/common/xutil.h: In function ‘xutil_get_text_property_from_reply’: /home/druden/util/awesome-3.4/common/xutil.h:39: warning: ‘STRING’ is deprecated (declared at /usr/local/include/xcb/xcb_atom.h:83) /home/druden/util/awesome-3.4/common/xutil.h: At top level: /home/druden/util/awesome-3.4/common/xutil.h:60: error: expected ‘)’ before ‘*’ token /home/druden/util/awesome-3.4/awesome.c: In function ‘awesome_atexit’: /home/druden/util/awesome-3.4/awesome.c:65: error: ‘awesome_t’ has no member named ‘hooks’ /home/druden/util/awesome-3.4/awesome.c:66: error: ‘awesome_t’ has no member named ‘L’ /home/druden/util/awesome-3.4/awesome.c:66: error: ‘awesome_t’ has no member named ‘hooks’ /home/druden/util/awesome-3.4/awesome.c:68: error: ‘awesome_t’ has no member named ‘L’ /home/druden/util/awesome-3.4/awesome.c:73: error: ‘awesome_t’ has no member named ‘embedded’ /home/druden/util/awesome-3.4/awesome.c:76: error: ‘awesome_t’ has no member named ‘embedded’ /home/druden/util/awesome-3.4/awesome.c:77: error: ‘awesome_t’ has no member named ‘embedded’ /home/druden/util/awesome-3.4/awesome.c:89: error: ‘awesome_t’ has no member named ‘clients’ /home/druden/util/awesome-3.4/awesome.c:89: error: ‘awesome_t’ has no member named ‘clients’ /home/druden/util/awesome-3.4/awesome.c:89: error: ‘awesome_t’ has no member named ‘clients’ /home/druden/util/awesome-3.4/awesome.c:89: warning: type defaults to ‘int’ in declaration of ‘c’ /home/druden/util/awesome-3.4/awesome.c:89: error: ‘awesome_t’ has no member named ‘clients’ /home/druden/util/awesome-3.4/awesome.c:89: error: ‘awesome_t’ has no member named ‘clients’ /home/druden/util/awesome-3.4/awesome.c:89: error: ‘awesome_t’ has no member named ‘clients’ /home/druden/util/awesome-3.4/awesome.c:91: error: invalid type argument of ‘unary *’ (have ‘int’) /home/druden/util/awesome-3.4/awesome.c:92: error: invalid type argument of ‘unary *’ (have ‘int’) /home/druden/util/awesome-3.4/awesome.c:96: error: ‘awesome_t’ has no member named ‘L’ /home/druden/util/awesome-3.4/awesome.c: In function ‘a_xcb_check_cb’: /home/druden/util/awesome-3.4/awesome.c:223: warning: implicit declaration of function ‘xcb_event_handle’ /home/druden/util/awesome-3.4/awesome.c:223: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c:230: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c: In function ‘awesome_restart’: /home/druden/util/awesome-3.4/awesome.c:277: error: ‘awesome_t’ has no member named ‘argv’ /home/druden/util/awesome-3.4/awesome.c: In function ‘xerror’: /home/druden/util/awesome-3.4/awesome.c:305: error: ‘XCB_EVENT_ERROR_BAD_WINDOW’ undeclared (first use in this function) /home/druden/util/awesome-3.4/awesome.c:305: error: (Each undeclared identifier is reported only once /home/druden/util/awesome-3.4/awesome.c:305: error: for each function it appears in.) /home/druden/util/awesome-3.4/awesome.c:306: error: ‘XCB_EVENT_ERROR_BAD_MATCH’ undeclared (first use in this function) /home/druden/util/awesome-3.4/awesome.c:308: error: ‘XCB_EVENT_ERROR_BAD_VALUE’ undeclared (first use in this function) /home/druden/util/awesome-3.4/awesome.c: In function ‘main’: /home/druden/util/awesome-3.4/awesome.c:369: error: ‘awesome_t’ has no member named ‘keygrabber’ /home/druden/util/awesome-3.4/awesome.c:370: error: ‘awesome_t’ has no member named ‘mousegrabber’ /home/druden/util/awesome-3.4/awesome.c:376: error: ‘awesome_t’ has no member named ‘argv’ /home/druden/util/awesome-3.4/awesome.c:377: error: ‘awesome_t’ has no member named ‘argv’ /home/druden/util/awesome-3.4/awesome.c:381: error: ‘awesome_t’ has no member named ‘argv’ /home/druden/util/awesome-3.4/awesome.c:382: error: ‘awesome_t’ has no member named ‘argv’ /home/druden/util/awesome-3.4/awesome.c:424: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:425: error: ‘awesome_t’ has no member named ‘timer’ /home/druden/util/awesome-3.4/awesome.c:425: error: ‘awesome_t’ has no member named ‘timer’ /home/druden/util/awesome-3.4/awesome.c:425: error: ‘awesome_t’ has no member named ‘timer’ /home/druden/util/awesome-3.4/awesome.c:425: error: ‘awesome_t’ has no member named ‘timer’ /home/druden/util/awesome-3.4/awesome.c:425: error: ‘awesome_t’ has no member named ‘timer’ /home/druden/util/awesome-3.4/awesome.c:425: error: ‘awesome_t’ has no member named ‘timer’ /home/druden/util/awesome-3.4/awesome.c:431: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:432: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:433: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:434: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:435: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:436: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:443: error: ‘awesome_t’ has no member named ‘default_screen’ /home/druden/util/awesome-3.4/awesome.c:450: error: ‘awesome_t’ has no member named ‘have_xtest’ /home/druden/util/awesome-3.4/awesome.c:462: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:464: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:465: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:467: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:468: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:471: warning: implicit declaration of function ‘xcb_event_handlers_init’ /home/druden/util/awesome-3.4/awesome.c:471: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c:472: warning: implicit declaration of function ‘xutil_error_handler_catch_all_set’ /home/druden/util/awesome-3.4/awesome.c:472: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c:490: warning: implicit declaration of function ‘xcb_event_poll_for_event_loop’ /home/druden/util/awesome-3.4/awesome.c:490: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c:493: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c:496: error: ‘awesome_t’ has no member named ‘keysyms’ /home/druden/util/awesome-3.4/awesome.c:507: error: ‘awesome_t’ has no member named ‘colors’ /home/druden/util/awesome-3.4/awesome.c:510: error: ‘awesome_t’ has no member named ‘colors’ /home/druden/util/awesome-3.4/awesome.c:513: error: ‘awesome_t’ has no member named ‘font’ /home/druden/util/awesome-3.4/awesome.c:519: error: ‘awesome_t’ has no member named ‘keysyms’ /home/druden/util/awesome-3.4/awesome.c:519: error: ‘awesome_t’ has no member named ‘numlockmask’ /home/druden/util/awesome-3.4/awesome.c:520: error: ‘awesome_t’ has no member named ‘shiftlockmask’ /home/druden/util/awesome-3.4/awesome.c:520: error: ‘awesome_t’ has no member named ‘capslockmask’ /home/druden/util/awesome-3.4/awesome.c:521: error: ‘awesome_t’ has no member named ‘modeswitchmask’ /home/druden/util/awesome-3.4/awesome.c:563: error: ‘awesome_t’ has no member named ‘evenths’ /home/druden/util/awesome-3.4/awesome.c:572: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:575: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:576: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:577: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:578: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:579: error: ‘awesome_t’ has no member named ‘loop’ /home/druden/util/awesome-3.4/awesome.c:580: error: ‘awesome_t’ has no member named ‘loop’ make[3]: * [CMakeFiles/awesome.dir/awesome.c.o] Error 1 make[2]: [CMakeFiles/awesome.dir/all] Error 2 make[1]: [all] Error 2 make: * [cmake-build] Error 2

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  • vb.net string concatenation string + function output + string = string + function output and no more

    - by Barfieldmv
    The following output produces a string with no closing xml tag. m_rFlight.Layout = m_rFlight.Layout + "<G3Grid:Spots>" + Me.gvwSpots.LayoutToString() + "</G3Grid:Spots>" This following code works correctly m_rFlight.Layout = m_rFlight.Layout + "<G3Grid:Spots>" + Me.gvwSpots.LayoutToString() m_rFlight.Layout = m_rFlight.Layout + "</G3Grid:Spots>" 'add closing tag What's going on here, what's the reason the first example isnt working and the second is? The gvwSpots.LayoutToString() function returns a string.

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  • Set form field values in ExtJS

    - by jeremib
    I'm using ExtJS to create a formPanel: new Ext.FormPanel({ labelAlign: 'top', title: 'Loading Contact...', bodyStyle:'padding:5px', width: 600, autoScroll: true, closable: true, items: [{ layout:'column', border:false, items:[{ columnWidth:.5, layout: 'form', border:false, items: [{ xtype:'textfield', fieldLabel: 'First Name', name: 'first_name', id: 'first_name', anchor:'95%' }, { xtype:'datefield', fieldLabel: 'Birthdate', name: 'birthdate', width: 150, }] },{ columnWidth:.5, layout: 'form', border:false, items: [{ xtype:'textfield', fieldLabel: 'Last Name', name: 'last_name', anchor:'95%' },{ xtype:'textfield', fieldLabel: 'Email', name: 'email', vtype:'email', anchor:'95%' }] }] },{ xtype:'tabpanel', plain:true, activeTab: 0, height:300, /* * By turning off deferred rendering we are guaranteeing that the * form fields within tabs that are not activated will still be * rendered. This is often important when creating multi-tabbed * forms. */ deferredRender: false, defaults:{bodyStyle:'padding:10px'}, items:[{ title:'Address', layout:'form', defaults: {width: 230}, defaultType: 'textfield', items: [{ fieldLabel: 'Line1', name: 'line1', allowBlank:false, },{ fieldLabel: 'Line2', name: 'line2', },{ fieldLabel: 'City', name: 'city', allowBlank: false, },{ xtype:"combo", fieldLabel:"State", name:"state", hiddenName:"combovalue" }, { fieldLabel: 'Zipcode', name: 'zipcode', allowBlank: false, }] },{ title:'Phone Numbers', layout:'form', defaults: {width: 230}, defaultType: 'textfield', items: [{ fieldLabel: 'Home', name: 'home_phone', },{ fieldLabel: 'Cell', name: 'cell_phone' },{ fieldLabel: 'Emergency', name: 'emergency_phone' }] },{ cls:'x-plain', title:'Notes', layout:'fit', items: { xtype:'htmleditor', name:'notes', fieldLabel:'Notes' } }] }], buttons: [{ text: 'Save' },{ text: 'Cancel' }] }) How do I access the form fields by the name to set their value manually? Thanks

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  • Specifying Android project dependencies (in Eclipse)

    - by Henrik Gustafsson
    I have two Android projects, a 'library project' containing a custom layout, and an 'application project' containing an application which uses the layout. Everything seems to build and execute fine, except that the visual layout editor throws a ClassNotFoundException (which I assume is a bug in the plug-in), but when I try to start to make use of the attributes I defined for the custom layout in the xml, I can no longer build. That is; this works: <?xml version="1.0" encoding="utf-8"?> <se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /> </se.fnord.android.layout.PredicateLayout> Whereas this does not: <?xml version="1.0" encoding="utf-8"?> <se.fnord.android.layout.PredicateLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:fnord="http://schemas.android.com/apk/res/se.fnord.android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView fnord:layout_horizontalSpacing="1px" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="asdfasdf" /> </se.fnord.android.layout.PredicateLayout> The build fails with a message from aapt: ERROR No resource identifier found for attribute 'layout_horizontalSpacing' in package 'se.fnord.android' The resource identifier does exist in the R-file and attrs.xml contained the library project, and if I put the layout code and resources directly in the application project everything works fine. The layout_horizontalSpacing attribute (and layout_verticalSpacing) is a custom attribute used in the PredicateLayout.LayoutParam class to specify the distance to the next widget. So far I've tried the standard eclipse ways by specifying project references and build path project dependencies. I was also told to try the tag in the application manifest, which did not help. So, what do I need to do for the references in the xml-file to work? I don't know if it's relevant, but the 'library' manifest looks like this: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.android" android:versionCode="1" android:versionName="1.0.0"> </manifest> The 'application' manifest like this: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="se.fnord.appname" android:versionCode="1" android:versionName="1.0.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".AppName" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> (The 'PredicateLayout', btw, is a cleaned-up version of this).

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  • log4j floods my console

    - by srikanth VM
    This is the log4j.properties that i have in my app log4j.rootLogger=B C log4j.logger.A=INFO, A1 log4j.debug=false log4j.appender.A1=org.apache.log4j.ConsoleAppender log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%d [%t] %-5p %C - %m%n log4j.logger.B=INFO, A2 log4j.debug=false log4j.appender.A2=org.apache.log4j.FileAppender log4j.appender.A2.file=PRIME-log.txt log4j.appender.A2.layout=org.apache.log4j.PatternLayout log4j.appender.A2.layout.ConversionPattern=%d [%t] %-5p %C - %m%n log4j.logger.C=INFO, A3 log4j.appender.A3=org.apache.log4j.FileAppender log4j.appender.A3.file=employee_pass_regeneration-log.txt log4j.appender.A3.layout=org.apache.log4j.PatternLayout log4j.appender.A3.layout.ConversionPattern=%d [%t] %-5p %C - %m%n I only want File appender so i only use that , but some how my console is always flooded with DEBUG messages which i have never used 8704 [http-8080-2] DEBUG org.springframework.web.servlet.view.JstlView - Rendering view with name 'passIndex' with model null and static attributes {} I guess these are all system messages , but with these debug messages its really hard to debug actually i mean i cannot find my own sysouts i tried log4j.debug=false but still i get these messages

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  • Placing figure in top-right corner of another

    - by Ivan Dubrov
    I want child figure (org.eclipse.draw2d.Figure) to be relative to the top-right corner of the parent (I want place some small icon, which will be ImageFigure, to be 12 pixels from top and right borders). Is there an existing layout manager that can layout child this way? The org.eclipse.draw2d.XYLayout is not capable of measuring position relative to corner other than top-left. Of course, I can: Write layout manager myself Layout children figure every time bounds are changed for the parent (in parent layout() method). However, I would like to know if some existing layout manager provides that functionality.

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  • How to solve rake tasks deprecation on the rails plugin?

    - by Dida
    Because of the concept introduced in here, Rails::Plugin is nothing more than a Rails::Engine, but since it's loaded too late in the boot process, it does not have the same configuration powers as a bare Rails::Engine. Opposite to Rails::Railtie and Rails::Engine, you are not supposed to inherit from Rails::Plugin. Rails::Plugin is automatically configured to be an engine by simply placing inside vendor/plugins. Since this is done automatically, you actually cannot declare a Rails::Engine inside your Plugin, otherwise it would cause the same files to be loaded twice. This means that if you want to ship an Engine as gem it cannot be used as plugin and vice-versa. Besides this conceptual difference, the only difference between Rails::Engine and Rails::Plugin is that plugins automatically load the file "init.rb" at the plugin root during the boot process. rake tasks in the rails plugins are deprecated and it is advised to use lib/tasks instead. How to solve this? Can I just simply move the plugin's tasks to the lib/tasks?

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  • Mixed alignment with Java Swing's GroupLayout

    - by zigdon
    I'm trying to build a GUI window in my application. What I'm trying to do is have a window, with a few buttons at the top, and a large text area. Something like this: +--------------------------------------------------+ | [button1] [button2] [button3] | | +----------------------------------------------+ | | | text area | | | | | | | | | | | | | | | +----------------------------------------------+ | +--------------------------------------------------+ I'm almost there, using GroupLayout: layout.setHorizontalGroup( layout.createParallelGroup() .addGroup(layout.createSequentialGroup() .addComponent(button1) .addComponent(button2)) .addComponent(closeWindow)) .addComponent(textarea1) ); layout.setVerticalGroup( layout.createSequentialGroup() .addGroup(layout.createParallelGroup() .addComponent(button1) .addComponent(button2) .addComponent(button3)) .addComponent(textarea) ); The problem is that this ends up with button3 aligned to the left, with the other two. I can't seem to figure out how I can specify the alignment on just that one button. I can do GroupLayout.Alignment.TRAILING on the entire button bar, but that hits all 3 buttons, which is also not quite right. So what's the correct approach? Since the alignment only applies for Parallel Groups, I don't think having a HorizontalGroup with two Sequential Groups in it will help? What am I missing?

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  • how to insert into database from stored procedure in log4net?

    - by Samreen
    I have to log thread context properties like this: string logFilePath = AppDomain.CurrentDomain.BaseDirectory + "log4netconfig.xml"; FileInfo finfo = new FileInfo(logFilePath); log4net.Config.XmlConfigurator.ConfigureAndWatch(finfo); ILog logger = LogManager.GetLogger("Exception.Logging"); log4net.ThreadContext.Properties["MESSAGE"] = exception.Message; log4net.ThreadContext.Properties["MODULE"] = "module1"; log4net.ThreadContext.Properties["COMPONENT"] = "component1"; logger.Debug("test"); and the configuration file is: <configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/> </configSections> <log4net> <logger name="Exception.Logging" level="Debug"> <appender-ref ref="AdoNetAppender"/> </logger> <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender"> <connectionString value="Data Source=xe;User ID=test;Password=test;" /> <connectionType value="System.Data.OracleClient.OracleConnection, System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> <bufferSize value="10000"/> <commandText value="Log_Exception_Pkg.Insert_Log" /> <commandType value="StoredProcedure" /> <parameter> <parameterName value="@p_Error_Message" /> <dbType value="String" /> <size value="255" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%property{MESSAGE}"/> </layout> </parameter> <parameter> <parameterName value="@p_Module" /> <dbType value="String" /> <size value="225" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%property{MODULE}"/> </layout> </parameter> <parameter> <parameterName value="@p_Component" /> <dbType value="String" /> <size value="225" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%property{COMPONENT}"/> </layout> </parameter> </appender> </log4net> </configuration> But its not inserting them in the database. How can I get that to work?

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  • Multi-tenant ASP.NET MVC - Views

    - by zowens
    Part I – Introduction Part II – Foundation Part III – Controllers   So far we have covered the basic premise of tenants and how they will be delegated. Now comes a big issue with multi-tenancy, the views. In some applications, you will not have to override views for each tenant. However, one of my requirements is to add extra views (and controller actions) along with overriding views from the core structure. This presents a bit of a problem in locating views for each tenant request. I have chosen quite an opinionated approach at the present but will coming back to the “views” issue in a later post. What’s the deal? The path I’ve chosen is to use precompiled Spark views. I really love Spark View Engine and was planning on using it in my project anyways. However, I ran across a really neat aspect of the source when I was having a look under the hood. There’s an easy way to hook in embedded views from your project. There are solutions that provide this, but they implement a special Virtual Path Provider. While I think this is a great solution, I would rather just have Spark take care of the view resolution. The magic actually happens during the compilation of the views into a bin-deployable DLL. After the views are compiled, the are simply pulled out of the views DLL. Each tenant has its own views DLL that just has “.Views” appended after the assembly name as a convention. The list of reasons for this approach are quite long. The primary motivation is performance. I’ve had quite a few performance issues in the past and I would like to increase my application’s performance in any way that I can. My customized build of Spark removes insignificant whitespace from the HTML output so I can some some bandwidth and load time without having to deal with whitespace removal at runtime.   How to setup Tenants for the Host In the source, I’ve provided a single tenant as a sample (Sample1). This will serve as a template for subsequent tenants in your application. The first step is to add a “PostBuildStep” installer into the project. I’ve defined one in the source that will eventually change as we focus more on the construction of dependency containers. The next step is to tell the project to run the installer and copy the DLL output to a folder in the host that will pick up as a tenant. Here’s the code that will achieve it (this belongs in Post-build event command line field in the Build Events tab of settings) %systemroot%\Microsoft.NET\Framework\v4.0.30319\installutil "$(TargetPath)" copy /Y "$(TargetDir)$(TargetName)*.dll" "$(SolutionDir)Web\Tenants\" copy /Y "$(TargetDir)$(TargetName)*.pdb" "$(SolutionDir)Web\Tenants\" The DLLs with a name starting with the target assembly name will be copied to the “Tenants” folder in the web project. This means something like MultiTenancy.Tenants.Sample1.dll and MultiTenancy.Tenants.Sample1.Views.dll will both be copied along with the debug symbols. This is probably the simplest way to go about this, but it is a tad inflexible. For example, what if you have dependencies? The preferred method would probably be to use IL Merge to merge your dependencies with your target DLL. This would have to be added in the build events. Another way to achieve that would be to simply bypass Visual Studio events and use MSBuild.   I also got a question about how I was setting up the controller factory. Here’s the basics on how I’m setting up tenants inside the host (Global.asax) protected void Application_Start() { RegisterRoutes(RouteTable.Routes); // create a container just to pull in tenants var topContainer = new Container(); topContainer.Configure(config => { config.Scan(scanner => { scanner.AssembliesFromPath(Path.Combine(Server.MapPath("~/"), "Tenants")); scanner.AddAllTypesOf<IApplicationTenant>(); }); }); // create selectors var tenantSelector = new DefaultTenantSelector(topContainer.GetAllInstances<IApplicationTenant>()); var containerSelector = new TenantContainerResolver(tenantSelector); // clear view engines, we don't want anything other than spark ViewEngines.Engines.Clear(); // set view engine ViewEngines.Engines.Add(new TenantViewEngine(tenantSelector)); // set controller factory ControllerBuilder.Current.SetControllerFactory(new ContainerControllerFactory(containerSelector)); } The code to setup the tenants isn’t actually that hard. I’m utilizing assembly scanners in StructureMap as a simple way to pull in DLLs that are not in the AppDomain. Remember that there is a dependency on the host in the tenants and a tenant cannot simply be referenced by a host because of circular dependencies.   Tenant View Engine TenantViewEngine is a simple delegator to the tenant’s specified view engine. You might have noticed that a tenant has to define a view engine. public interface IApplicationTenant { .... IViewEngine ViewEngine { get; } } The trick comes in specifying the view engine on the tenant side. Here’s some of the code that will pull views from the DLL. protected virtual IViewEngine DetermineViewEngine() { var factory = new SparkViewFactory(); var file = GetType().Assembly.CodeBase.Without("file:///").Replace(".dll", ".Views.dll").Replace('/', '\\'); var assembly = Assembly.LoadFile(file); factory.Engine.LoadBatchCompilation(assembly); return factory; } This code resides in an abstract Tenant where the fields are setup in the constructor. This method (inside the abstract class) will load the Views assembly and load the compilation into Spark’s “Descriptors” that will be used to determine views. There is some trickery on determining the file location… but it works just fine.   Up Next There’s just a few big things left such as StructureMap configuring controllers with a convention instead of specifying types directly with container construction and content resolution. I will also try to find a way to use the Web Forms View Engine in a multi-tenant way we achieved with the Spark View Engine without using a virtual path provider. I will probably not use the Web Forms View Engine personally, but I’m sure some people would prefer using WebForms because of the maturity of the engine. As always, I love to take questions by email or on twitter. Suggestions are always welcome as well! (Oh, and here’s another link to the source code).

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  • Silverlight - Access the Layout Grid's DataContext in a DataGrid CellTemplate's DataTemplate?

    - by Sudeep
    Hi, I am using Silverlight 3 to develop an application. In my app, I have a layout Grid (named "LayoutGrid") in which I have a DataGrid (named "PART_datagrid") with DataGridTemplateColumns. The LayoutGrid is set a DataContext in which there is a Ladders list as a property. This Ladders list is set as the ItemsSource for the PART_datagrid. <Grid x:Name="LayoutRoot"> <DataGrid x:Name="PART_datagrid" ItemsSource="{Binding Ladders}"> ... <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <Button Name="DeleteLadder" Click.Command="{Binding ElementName=LayoutRoot, Path=DataContext.DeleteLadderCommand}" /> Now in one of the DataGridTemplateColumns I have a button which should invoke a Command thats present in the LayoutGrid's DataContext. So I tried Element-To-Element binding on my DataTemplate button as follows <Button Name="DeleteLadder" Click.Command="{Binding ElementName=LayoutRoot, Path=DataContext.DeleteLadderCommand}" /> But this does not seem to work. What I want to achieve is to handle the event of deletion of a DataGrid row at the parent DataContext level using the command. Can someone pls suggest how do I proceed on this? Thanks in advance...

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  • How to get NEW width/height of root layout in onConfigurationChanged?

    - by jboxer
    One of our views has a ScrollView as its root layout. When the device is rotated and onConfigurationChanged() is called, we'd like to be able to get the ScrollView's new width/height. Our code looks like this: @Override public void onConfigurationChanged(Configuration newConfig) { Log.d(TAG, "Width: '" + findViewById(R.id.scrollview).getWidth() + "'"); Log.d(TAG, "Height: '" + findViewById(R.id.scrollview).getHeight() + "'"); super.onConfigurationChanged(newConfig); Log.d(TAG, "Width: '" + findViewById(R.id.scrollview).getWidth() + "'"); Log.d(TAG, "Height: '" + findViewById(R.id.scrollview).getHeight() + "'"); } And the relevant section of our AndroidManifest.xml looks like this: <activity android:name=".SomeActivity" android:configChanges="keyboardHidden|orientation"> <intent-filter> <action android:name="android.intent.action.MAIN" /> </intent-filter> </activity> On our Droid, we expected to see the ScrollView's width go to 854 when switched into landscape, and to 480 when switched back to portrait (and the height do the equivalent switch, minus the menu bar). However, we're seeing the opposite. Here's our LogCat: // Switching to landscape: 03-26 11:26:16.490: DEBUG/ourtag(17245): Width: '480' // Before super 03-26 11:26:16.490: DEBUG/ourtag(17245): Height: '778' // Before super 03-26 11:26:16.529: DEBUG/ourtag(17245): Width: '480' // After super 03-26 11:26:16.536: DEBUG/ourtag(17245): Height: '778' // After super // Switching to portrait: 03-26 11:26:28.724: DEBUG/ourtag(17245): Width: '854' // Before super 03-26 11:26:28.740: DEBUG/ourtag(17245): Height: '404' // Before super 03-26 11:26:28.740: DEBUG/ourtag(17245): Width: '854' // After super 03-26 11:26:28.740: DEBUG/ourtag(17245): Height: '404' // After super Clearly, we're getting the portrait dimensions when we switch to landscape, and the landscape dimensions when we switch to portrait. Is there something we're doing wrong? We could get hacky and solve this, but I feel like there's a simple solution that we're missing.

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  • How to make a small engine like Wolfram|Alpha?

    - by Koning WWWWWWWWWWWWWWWWWWWWWWW
    Lets say I have three models/tables: operating_systems, words, and programming_languages: # operating_systems name:string created_by:string family:string Windows Microsoft MS-DOS Mac OS X Apple UNIX Linux Linus Torvalds UNIX UNIX AT&T UNIX # words word:string defenitions:string window (serialized hash of defenitions) hello (serialized hash of defenitions) UNIX (serialized hash of defenitions) # programming_languages name:string created_by:string example_code:text C++ Bjarne Stroustrup #include <iostream> etc... HelloWorld Jeff Skeet h AnotherOne Jon Atwood imports 'SORULEZ.cs' etc... When a user searches hello, the system shows the defenitions of 'hello'. This is relatively easy to implement. However, when a user searches UNIX, the engine must choose: word or operating_system. Also, when a user searches windows (small letter 'w'), the engine chooses word, but should also show Assuming 'windows' is a word. Use as an <a href="etc..">operating system</a> instead. Can anyone point me in the right direction with parsing and choosing the topic of the search query? Thanks. Note: it doesn't need to be able to perform calculations as WA can do.

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  • How to display only one letter in Flex Text Layout Framework ContainerController?

    - by rattkin
    I'm trying to implement dropped initials feature into my Flex application. Since Text Layout Framework does not support floating, the only known solution is to create additional containers that will be linked together, displaying the same textflow. Width and positioning of these containers has to be set in such a way that it will pretend that it's float. I'm using the same solution for dropped initials. Basically, I'm creating three containers, one for the initial letter (first letter in text flow), the other for text floating around, and the 3rd one to display text below these two. All these containers share one textflow. I have big issues with forcing controller to display only one letter from the text flow, and size it accordingly, so that it wont take any unnecessary aditional space and won't get any more text into it. Using ContainerController.getContentBounds() returns me size of whole sprite of the letter (with ascent/descent empty parts), not the height/width of the actual rendered letter. I'm using textFlow.flowComposer.getLineAt(0).getTextLine().getAtomBounds(0), but i think it's still not right. Also, even if I set container for this dimensions, it sometimes display additional text in it, especially for bigger fonts. See screen : Also, if I set width to just 1px less that contentBounds, things are going crazy, containers are moved around, positioned with big margins, etc. How should I solve this? Is it a bug in TLF / Player? Can I fix it somehow? Can I detect the size of the letter, or make containercontroller autosize to fit just one letter only?

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  • What Do You Need To Write Your Own Blog Engine?

    - by deworde
    I've been messing around with basic websites for a few years, using companies like www.Fasthosts.co.uk to do my web hosting. But I'd like to expand my skills from C++ and Java app programming into Web-based programming, and I think the best way to do that is with a project. I've chosen to go with a blog engine because it's a relative comprehensive yet non-complex project. I'm aware that you can just go to Blogger and bam! One blog. I've done that, so that I can at least have some content, and work out what I want to do with this blog. At the moment, I'm thinking I'll use it to chart my progress creating the blogging engine. But I have some questions. Do you need to be running your own server? Or is it more sensible in the short-term to use a hosting company? What types of language are worth considering? What's important to focus on from a design perspective? What unexpected problems might I encounter?

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  • How to customize Bootstrap typeahead layout/function for more than just text?

    - by Loolooii
    I'm working on a search functionality for my website and I'm using Bootstrap's typeahead to show the results. So far so good. But what I want is to extend the function so that I could add an image and some other item, say description, etc. According to this post, that is possible: custom typeahead. Basically I need something like this as each result item: <div class="resultContainer"> <div class="resultImage"><img /></div> <div class="resultDesc"></div> <div class="resultLabel"></div> </div> Now it's: <li><a href="#"></a></li> And this doesn't even work with a longer text than the width of the typeahead. So the text doesn't go to the next line and hence doesn't fit the <li>. How can I use the the custom layout I want? (btw I have an array of arrays of results. Each sub-array contains img, desc, etc.). This is what I have right now: Thanks in advance.

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  • Whats the best semantic default/starting layout for html5?

    - by John Isaacks
    I am a little confused on how the new tags should go. Is this correct: <!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title></title> </head> <body> <section> <header> <nav></nav> </header> <section> </section> <footer> </footer> <section> </body> </html> Or should one of the sections be an <article>? What should be the starting layout?

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  • What's the best way to handle layout issues with multi-language support in WPF/XAML?

    - by Tim
    I'm creating a standalone WPF app with multi-language support. I've found some great resources (mostly on SO) on how to store and access the strings as needed. This part is pretty straightforward and doable, but I'm fuzzy on how to take care of screen layout issues. I'm using some custom images to skin up my app for buttons, etc. For instance, here's a button with some text within: <Button Canvas.Left="33" Canvas.Top="484" Style="{StaticResource SmallButtonBase}"> <TextBlock FontSize="20" FontWeight="Bold" TextAlignment="Center" FontFamily="Helvetica"> Enter </TextBlock> </Button> Now here is the same button with text from another language: <Button Canvas.Left="33" Canvas.Top="484" Style="{StaticResource SmallButtonBase}"> <TextBlock FontSize="20" FontWeight="Bold" TextAlignment="Center" FontFamily="Helvetica"> Enterenschtein </TextBlock> </Button> So my question is: What is a good method to prevent this "overflow" situation. I'd like to have XAML take care of any font resizing or indenting that is needed automatically so that I don't have to tweak the UI for each language I'm supporting. Any insight is appreciated!

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  • Browser/addon which shows what's been downloaded so far regardless of formatting and layout ?

    - by Mick
    Every now and then a website becomes super-slow (but not broken) because there are too many people looking at it at the same time. When I try and view such a site, say with Firefox, I can see that it is downloading all sorts of components of the site because of the progress information printed at the bottom of the window and I'm sitting there thinking "If only the browser would show me what it's got so far. I don't care if its a jumbled mess, I just want to see what you've got". Does any browser offer such an option?

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  • Browser which shows what's been downloaded so far regardless of formatting and layout ?

    - by Mick
    Every now and then a website becomes super-slow (but not broken) because there are too many people looking at it at the same time. When I try and view such a site, say with Firefox, I can see that it is downloading all sorts of components of the site because of the progress information printed at the bottom of the window and I'm sitting there thinking "If only the browser would show me what it's got so far. I don't care if its a jumbled mess, I just want to see what you've got". Does any browser offer such an option?

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  • Windows shell damaged? Basic tabs and buttons layout with Aero enabled

    - by Dragiša
    I would need little help from you. This is first time I see something like this happen to shell in Windows 7, as you can see, tabs and buttons in some programs, or control panel (see screenshot) are like those in basic Windows theme. Of course, there is selected 'Adjust for best appearance' in System Properties, so it's not making a problem, also Aero theme is enabled, which is obvious. What could be solution for this?

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  • Ada and 'The Book'

    - by Phil Factor
    The long friendship between Charles Babbage and Ada Lovelace created one of the most exciting and mysterious of collaborations ever to have resulted in a technological breakthrough. The fireworks that created by the collision of two prodigious mathematical and creative talents resulted in an invention, the Analytical Engine, which went on to change society fundamentally. However, beyond that, we just don't know what the bulk of their collaborative work was about:;  it was done in strictest secrecy. Even the known outcome of their friendship, the first programmable computer, was shrouded in mystery. At the time, nobody, except close friends and family, had any idea of Ada Byron's contribution to the invention of the ‘Engine’, and how to program it. Her great insight was published in August 1843, under the initials AAL, standing for Ada Augusta Lovelace, her title then being the Countess of Lovelace. It was contained in a lengthy ‘note’ to her translation of a publication that remains the best description of Babbage's amazing Analytical Engine. The secret identity of the person behind those enigmatic initials was finally revealed by Prince de Polignac who, seventy years later, wrote to Ada's daughter to seek confirmation that her mother had, indeed, been the author of the brilliant sentences that described so accurately how Babbage's mechanical computer could be programmed with punch-cards. L.F. Menabrea's paper on the Analytical Engine first appeared in the 'Bibliotheque Universelle de Geneve' in October 1842, and Ada translated it anonymously for Taylor's 'Scientific Memoirs'. Charles Babbage was surprised that she had not written an original paper as she already knew a surprising amount about the way the machine worked. He persuaded her to at least write some explanatory notes. These notes ended up extending to four times the length of the original article and represented the first published account of how a machine could be programmed to perform any calculation. Her example of programming the Bernoulli sequence would have worked on the Analytical engine had the device’s construction been completed, and gave Ada an unassailable claim to have invented the art of programming. What was the reason for Ada's secrecy? She was the only legitimate child of Lord Byron, who was probably the best known celebrity of the age, so she was already famous. She was a senior aristocrat, with titles, a fortune in money and vast estates in the Midlands. She had political influence, and was the cousin of Lord Melbourne, who was the Prime Minister at that time. She was friendly with the young Queen Victoria. Her mathematical activities were a pastime, and not one that would be considered by others to be in keeping with her roles and responsibilities. You wouldn't dare to dream up a fictional heroine like Ada. She was dazzlingly beautiful and talented. She could speak several languages fluently, and play some musical instruments with professional skill. Contemporary accounts refer to her being 'accomplished in science, art and literature'. On top of that, she was a brilliant mathematician, a talent inherited from her mother, Annabella Milbanke. In her mother's circle of literary and scientific friends was Charles Babbage, and Ada's friendship with him dates from her teenage zest for Mathematics. She was one of the first people he'd ever met who understood what he had attempted to achieve with the 'Difference Engine', and with whom he could converse as intellectual equals. He arranged for her to have an education from the most talented academics in the country. Ada melted the heart of the cantankerous genius to the point that he became a faithful and loyal father-figure to her. She was one of the very few who could grasp the principles of the later, and very different, ‘Analytical Engine’ which was designed from the start to tackle a variety of tasks. Sadly, Ada Byron's life ended less than a decade after completing the work that assured her long-term fame, in November 1852. She was dying of cancer, her gambling habits had caused her to run up huge debts, she'd had more than one affairs, and she was being blackmailed. Her brilliant but unempathic mother was nursing her in her final illness, destroying her personal letters and records, and repaying her debts. Her husband was distraught but helpless. Charles Babbage, however, maintained his steadfast paternalistic friendship to the end. She appointed her loyal friend to be her executor. For years, she and Babbage had been working together on a secret project, known only as 'The Book'. We have a clue to what it was in a letter written by her nine years earlier, on 11th August 1843. It was a joint project by herself and Lord Lovelace, her husband, and was intended to involve Babbage's 'undivided energies'. It involved 'consulting your Engine' (it required Babbage’s computer). The letter gives no hint about the project except for the high-minded nature of its purpose, and its highly mathematical nature.  From then on, the surviving correspondence between the two gives only veiled references to 'The Book'. There isn't much, since Babbage later destroyed any letters that could have damaged her reputation within the Establishment. 'I cannot spare the book today, which I am very sorry for. At the moment I want it for constant reference, but I think you can have it tomorrow' (Oct 1844)  And 'I will send you the book directly, and you can say, when you receive it, how long you will want to keep it'. (Nov 1844)  The two of them were obviously intent on the work: She writes, four years later, 'I have an engagement for Wednesday which will prevent me from attending to your wishes about the book' (Dec 1848). This was something that they both needed to work on, but could not do in parallel: 'I will send the book on Tuesday, and it can be left with you till Friday' (11 Feb 1849). After six years work, it had been so well-handled that it was beginning to fall apart: 'Don't forget the new cover you promised for the book. The poor book is very shabby and wants one' (20 Sept 1849). So what was going on? The word 'book' was not a code-word: it was a real book, probably a 'printer's blank', plain paper, but properly bound so printers and publishers could show off how the published work might look. The hints from the correspondence are of advanced mathematics. It is obvious that the book was travelling between them, back and forth, each one working on it for less than a week before passing it back. Ada and her husband were certainly involved in gambling large sums of money on the horses, and so most biographers have concluded that the three of them were trying to calculate the mathematical odds on the horses. This theory has three large problems. Firstly, Ada's original letter proposing the project refers to its high-minded nature. Babbage was temperamentally opposed to gambling and would scarcely have given so much time to the project, even though he was devoted to Ada. Secondly, Babbage would have very soon have realized the hopelessness of trying to beat the bookies. This sort of betting never attracts his type of intellectual background. The third problem is that any work on calculating the odds on horses would not need a well-thumbed book to pass back and forth between them; they would have not had to work in series. The original project was instigated by Ada, along with her husband, William King-Noel, 1st Earl of Lovelace. Charles Babbage was invited to join the project after the couple had come up with the idea. What could William have contributed? One might assume that William was a Bertie Wooster character, addicted only to the joys of the turf, but this was far from the truth. He was a scientist, a Cambridge graduate who was later elected to be a Fellow of the Royal Society. After Eton, he went to Trinity College, Cambridge. On graduation, he entered the diplomatic service and acted as secretary under Lord Nugent, who was Lord Commissioner of the Ionian Islands. William was very friendly with Babbage too, able to discuss scientific matters on equal terms. He was a capable engineer who invented a process for bending large timbers by the application of steam heat. He delivered a paper to the Institution of Civil Engineers in 1849, and received praise from the great engineer, Isambard Kingdom Brunel. As well as being Lord Lieutenant of the County of Surrey for most of Victoria's reign, he had time for a string of scientific and engineering achievements. Whatever the project was, it is unlikely that William was a junior partner. After Ada's death, the project disappeared. Then, two years later, Babbage, through one of his occasional outbursts of temper, demonstrated that he was able to decrypt one of the most powerful of secret codes, Vigenère's autokey cipher.  All contemporary diplomatic and military messages used a variant of this cipher. Babbage had made three important discoveries, namely, the mathematical law of this cipher, the principle of the key periodicity, and the technique of the symmetry of position. The technique is now known as the Kasiski examination, also called the Kasiski test, but Babbage got there first. At one time, he listed amongst his future projects, the writing of a book 'The Philosophy of Decyphering', but it never came to anything. This discovery was going to change the course of history, since it was used to decipher the Russians’ military dispatches in the Crimean war. Babbage himself played a role during the Crimean War as a cryptographical adviser to his friend, Rear-Admiral Sir Francis Beaufort of the Admiralty. This is as much as we can be certain about in trying to make sense of the bulk of the time that Charles Babbage and Ada Lovelace worked together. Nine years of intensive work, involving the 'Engine' and a great deal of mathematics and research seems to have been lost: or has it? I've argued in the past http://www.simple-talk.com/community/blogs/philfactor/archive/2008/06/13/59614.aspx that the cracking of the Vigenère autokey cipher, was a fundamental motive behind the British Government's support and funding of the 'Difference Engine'. The Duke of Wellington, whose understanding of the military significance of being able to read enemy dispatches, was the most steadfast advocate of the project. If the three friends were actually doing the work of cracking codes by mathematical techniques that used the techniques of key periodicity, and symmetry of position (the use of a book being passed quickly to and fro is very suggestive), intending to then use the 'Engine' to do the routine cracking of each dispatch, then this is a rather different story. The project was Ada and William's idea. (William had served in the diplomatic service and would be familiar with the use of codes). This makes Ada Lovelace the initiator of a project which, by giving both Britain, and probably the USA, a diplomatic and military advantage in the second part of the Nineteenth century, changed world history. Ada would never have wanted any credit for cracking the cipher, and developing the method that rendered all contemporary military and diplomatic ciphering techniques nugatory; quite the reverse. And it is clear from the gaps in the record of the letters between the collaborators that the evidence was destroyed, probably on her request by her irascible but intensely honorable executor, Charles Babbage. Charles Babbage toyed with the idea of going public, but the Crimean war put an end to that. The British Government had a valuable secret, and intended to keep it that way. Ada and Charles had quite often discussed possible moneymaking projects that would fund the development of the Analytic Engine, the first programmable computer, but their secret work was never in the running as a potential cash cow. I suspect that the British Government was, even then, working on the concealment of a discovery whose value to the nation depended on it remaining so. The success of code-breaking in the Crimean war, and the American Civil war, led to the British and Americans  subsequently giving much more weight and funding to the science of decryption. Paradoxically, this makes Ada's contribution even closer to the creation of Colossus, the first digital computer, at Bletchley Park, specifically to crack the Nazi’s secret codes.

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  • SEHException throw using Microsoft XACT Audio Framework (XACT3)

    - by Sweta Dwivedi
    I have been developing a game using Kinect + XNA and using Microsoft Audio Creation tool (XACT3) for managing my sound files and music, however in the code an SEHException is thrown whenever it tries to get the wave file from the wave Bank . . Sometimes the code works magically and all of a sudden it will start throwing this exception randomly ..I need a help on solving this exception /*Declaring Audio Engine for music*/ AudioEngine engine; SoundBank soundBank; WaveBank waveBank; Cue cue; /*Declaring Audio engine for sound effects*/ AudioEngine engine1; SoundBank soundbank; WaveBank wavebank; Cue effect; engine = new AudioEngine(@"Content\therapy.xgs"); soundBank = new SoundBank(engine, @"Content\Sound Bank.xsb"); **waveBank = new WaveBank(engine, @"Content\Wave Bank.xwb");** cue = null; engine1 = new AudioEngine(@"Content\Music_Manager\Sound_effects.xgs"); soundbank = new SoundBank(engine1, @"Content\Music_Manager\Sound1.xsb"); **wavebank = new WaveBank(engine1, @"Content\Music_Manager\Wave1.xwb");** effect = null; cue = soundBank.GetCue("hypnotizing"); cue.Play();

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  • How to designing a generic databse whos layout may change over time?

    - by mawg
    Here's a tricky one - how do I programatically create and interrogate a database who's contents I can't really foresee? I am implementing a generic input form system. The user can create PHP forms with a WYSIWYG layout and use them for any purpose he wishes. He can also query the input. So, we have three stages: a form is designed and generated. This is a one-off procedure, although the form can be edited later. This designs the database. someone or several people make use of the form - say for daily sales reports, stock keeping, payroll, etc. Their input to the forms is written to the database. others, maybe management, can query the database and generate reports. Since these forms are generic, I can't predict the database structure - other than to say that it will reflect HTML form fields and consist of a the data input from collection of edit boxes, memos, radio buttons and the like. Questions and remarks: A) how can I best structure the database, in terms of tables and columns? What about primary keys? My first thought was to use the control name to identify each column, then I realized that the user can edit the form and rename, so that maybe "name" becomes "employee" or "wages" becomes ":salary". I am leaning towards a unique number for each. B) how best to key the rows? I was thinking of a timestamp to allow me to query and a column for the row Id from A) C) I have to handle column rename/insert/delete. Foe deletion, I am unsure whether to delete the data from the database. Even if the user is not inputting it from the form any more he may wish to query what was previously entered. Or there may be some legal requirements to retain the data. Any gotchas in column rename/insert/delete? D) For the querying, I can have my PHP interrogate the database to get column names and generate a form with a list where each entry has a database column name, a checkbox to say if it should be used in the query and, based on column type, some selection criteria. That ought to be enough to build searches like "position = 'senior salesman' and salary 50k". E) I probably have to generate some fancy charts - graphs, histograms, pie charts, etc for query results of numerical data over time. I need to find some good FOSS PHP for this. F) What else have I forgotten? This all seems very tricky to me, but I am database n00b - maybe it is simple to you gurus?

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  • Android strange behavior with listview and custom cursor adapter

    - by Michael Little
    I have a problem with a list view and a custom cursor adapter and I just can't seem to figure out what is wrong with my code. Basically, in my activity I call initalize() that does a bunch of stuff to handle getting the proper data and initializing the listview. On first run of the activity you can see from the images that one of the items is missing from the list. If I go to another activity and go back to this activity the item that was missing shows up. I believe it has something to do with setContentView(R.layout.parent). If I move that to my initialize() then the item never shows up even when returning from another activity. So, for some reason, returning from another activity bypasses setContentView(R.layout.parent) and everything works fine. I know it's impossible for me to bypass setContentView(R.layout.parent) so I need to figure out what the problem is. Also, I did not include the layout because it is nothing more then two textviews. Also, the images I have attached do not show that the missing item is the last one on the list. Custom Cursor Adapter: public class CustomCursorAdapter extends SimpleCursorAdapter { private Context context; private int layout; public CustomCursorAdapter (Context context, int layout, Cursor c, String[] from, int[] to) { super(context, layout, c, from, to); this.context = context; this.layout = layout; } public View newView(Context context, Cursor cursor, ViewGroup parent) { LayoutInflater inflater = LayoutInflater.from(context); final View view = inflater.inflate(layout, parent, false); return view; } @Override public void bindView(View v, Context context, Cursor c) { if (c.getColumnName(0).matches("section")){ int nameCol = c.getColumnIndex("section"); String section = c.getString(nameCol); TextView section_text = (TextView) v.findViewById(R.id.text1); if ((section.length() > 0)) { section_text.setText(section); } else { //so we don't have an empty spot section_text.setText(""); section_text.setVisibility(2); section_text.setHeight(1); } } else if (c.getColumnName(0).matches("code")) { int nameCol = c.getColumnIndex("code"); String mCode = c.getString(nameCol); TextView code_text = (TextView) v.findViewById(R.id.text1); if (code_text != null) { int i = 167; byte[] data = {(byte) i}; String strSymbol = EncodingUtils.getString(data, "windows-1252"); mCode = strSymbol + " " + mCode; code_text.setText(mCode); code_text.setSingleLine(); } } if (c.getColumnName(1).matches("title")){ int nameCol = c.getColumnIndex("title"); String mTitle = c.getString(nameCol); TextView title_text = (TextView) v.findViewById(R.id.text2); if (title_text != null) { title_text.setText(mTitle); } } else if (c.getColumnName(1).matches("excerpt")) { int nameCol = c.getColumnIndex("excerpt"); String mExcerpt = c.getString(nameCol); TextView excerpt_text = (TextView) v.findViewById(R.id.text2); if (excerpt_text != null) { excerpt_text.setText(mExcerpt); excerpt_text.setSingleLine(); } } } The Activity: public class parent extends ListActivity { private static String[] TITLE_FROM = { SECTION, TITLE, _ID, }; private static String[] CODE_FROM = { CODE, EXCERPT, _ID, }; private static String ORDER_BY = _ID + " ASC"; private static int[] TO = { R.id.text1, R.id.text2, }; String breadcrumb = null; private MyData data; private SQLiteDatabase db; CharSequence parent_id = ""; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); data = new MyData(this); db = data.getReadableDatabase(); setContentView(R.layout.parent); initialize(); } public void initialize() { breadcrumb = null; Bundle bun = getIntent().getExtras(); TextView tvBreadCrumb; tvBreadCrumb = (TextView)findViewById(R.id.breadcrumb); if (bun == null) { //this is the first run tvBreadCrumb.setText(null); tvBreadCrumb.setHeight(0); parent_id = "0"; try { Cursor cursor = getData(parent_id); showSectionData(cursor); } finally { data.close(); } } else { CharSequence state = bun.getString("state"); breadcrumb = bun.getString("breadcrumb"); tvBreadCrumb.setText(breadcrumb); CharSequence code = bun.getString("code"); parent_id = code; if (state.equals("chapter")) { try { Cursor cursor = getData(parent_id); showSectionData(cursor); } finally { data.close(); } } else if (state.equals("code")) { try { Cursor cursor = getCodeData(parent_id); showCodeData(cursor); } finally { data.close(); } } } } @Override public void onStart() { //initialize(); super.onResume(); } @Override public void onResume() { initialize(); super.onResume(); } private Cursor getData(CharSequence parent_id) { Cursor cTitles = db.query(TITLES_TABLE_NAME, TITLE_FROM, "parent_id = " + parent_id, null, null, null, ORDER_BY); Cursor cCodes = db.query(CODES_TABLE_NAME, CODE_FROM, "parent_id = " + parent_id, null, null, null, ORDER_BY); Cursor[] c = {cTitles, cCodes}; Cursor cursor = new MergeCursor(c); startManagingCursor(cursor); return cursor; } private Cursor getCodeData(CharSequence parent_id2) { Bundle bun = getIntent().getExtras(); CharSequence intent = bun.getString("intent"); CharSequence searchtype = bun.getString("searchtype"); //SQLiteDatabase db = data.getReadableDatabase(); if (intent != null) { String sWhere = null; if(searchtype.equals("code")) { sWhere = "code LIKE '%"+parent_id2+"%'"; } else if(searchtype.equals("within")){ sWhere = "definition LIKE '%"+parent_id2+"%'"; } //This is a search request Cursor cursor = db.query(CODES_TABLE_NAME, CODE_FROM, sWhere, null, null, null, ORDER_BY); startManagingCursor(cursor); return cursor; } else { Cursor cursor = db.query(CODES_TABLE_NAME, CODE_FROM, "parent_id = "+ parent_id2, null, null, null, ORDER_BY); startManagingCursor(cursor); return cursor; } } private void showSectionData(Cursor cursor) { CustomCursorAdapter adapter= new CustomCursorAdapter(this, R.layout.item, cursor, TITLE_FROM, TO); setListAdapter(adapter); } private void showCodeData(Cursor cursor) { CustomCursorAdapter adapter = new CustomCursorAdapter(this, R.layout.item, cursor, CODE_FROM, TO); setListAdapter(adapter); Bundle bun = getIntent().getExtras(); CharSequence intent = bun.getString("intent"); if (intent != null) { Cursor cursor1 = ((CursorAdapter)getListAdapter()).getCursor(); startManagingCursor(cursor1); TextView tvBreadCrumb; tvBreadCrumb = (TextView)findViewById(R.id.breadcrumb); tvBreadCrumb.setText(cursor1.getCount() + " Records Found"); //cursor1.close(); //mdl } }

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