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• How do I make Linux recognize a new SATA /dev/sda drive I hot swapped in without rebooting?

  - by Philip Durbin

  Hot swapping out a failed SATA /dev/sda drive worked fine, but when I went to swap in a new drive, it wasn't recognized: [root@fs-2 ~]# tail -18 /var/log/messages May 5 16:54:35 fs-2 kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen May 5 16:54:35 fs-2 kernel: ata1: SError: { PHYRdyChg CommWake } May 5 16:54:40 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:45 fs-2 kernel: ata1: device not ready (errno=-16), forcing hardreset May 5 16:54:45 fs-2 kernel: ata1: soft resetting link May 5 16:54:50 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:55 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:54:55 fs-2 kernel: ata1: soft resetting link May 5 16:55:00 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:05 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:05 fs-2 kernel: ata1: soft resetting link May 5 16:55:10 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:40 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:40 fs-2 kernel: ata1: limiting SATA link speed to 1.5 Gbps May 5 16:55:40 fs-2 kernel: ata1: soft resetting link May 5 16:55:45 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:45 fs-2 kernel: ata1: reset failed, giving up May 5 16:55:45 fs-2 kernel: ata1: EH complete I tried a couple things to make the server find the new /dev/sda, such as rescan-scsi-bus.sh but they didn't work: [root@fs-2 ~]# echo "---" > /sys/class/scsi_host/host0/scan -bash: echo: write error: Invalid argument [root@fs-2 ~]# [root@fs-2 ~]# /root/rescan-scsi-bus.sh -l [snip] 0 new device(s) found. 0 device(s) removed. [root@fs-2 ~]# [root@fs-2 ~]# ls /dev/sda ls: /dev/sda: No such file or directory I ended up rebooting the server. /dev/sda was recognized, I fixed the software RAID, and everything is fine now. But for next time, how can I make Linux recognize a new SATA drive I have hot swapped in without rebooting? The operating system in question is RHEL5.3: [root@fs-2 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.3 (Tikanga) The hard drive is a Seagate Barracuda ES.2 SATA 3.0-Gb/s 500-GB, model ST3500320NS. Here is the lscpi output: [root@fs-2 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0a.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0d.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0e.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) Update: In perhaps a dozen cases, we've been forced to reboot servers because hot swap hasn't "just worked." Thanks for the answers to look more into the SATA controller. I've included the lspci output for the problematic system above (hostname: fs-2). I could still use some help understanding what exactly isn't supported hardware-wise in terms of hot swap for that system. Please let me know what other output besides lspci might be useful. The good news is that hot swap "just worked" today on one of our servers (hostname: www-1), which is very rare for us. Here is the lspci output: [root@www-1 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:19.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 09:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1064ET PCI-Express Fusion-MPT SAS (rev 04)

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• AvalonDock + UserControl + DataGrid + ContextMenu command routing issue

  - by repka

  I have this kind of layout: <Window x:Class="DockAndMenuTest.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ad="clr-namespace:AvalonDock;assembly=AvalonDock" Title="MainWindow" Height="350" Width="525"> <ad:DockingManager> <ad:DocumentPane> <ad:DockableContent Title="Doh!"> <UserControl> <UserControl.CommandBindings> <CommandBinding Command="Zoom" Executed="ExecuteZoom" CanExecute="CanZoom"/> </UserControl.CommandBindings> <DataGrid Name="_evilGrid"> <DataGrid.Resources> <Style TargetType="DataGridRow"> <Setter Property="ContextMenu"> <Setter.Value> <ContextMenu> <MenuItem Command="Zoom"/> </ContextMenu> </Setter.Value> </Setter> </Style> </DataGrid.Resources> </DataGrid> </UserControl> </ad:DockableContent> </ad:DocumentPane> </ad:DockingManager> </Window> Briefly: ContextMenu is set for each DataGridRow of DataGrid inside UserControl, which in its turn is inside DockableContent of AvalonDock. Code-behind is trivial as well: public partial class MainWindow { public MainWindow() { InitializeComponent(); _evilGrid.ItemsSource = new[] { Tuple.Create(1, 2, 3), Tuple.Create(4, 4, 3), Tuple.Create(6, 7, 1), }; } private void ExecuteZoom(object sender, ExecutedRoutedEventArgs e) { MessageBox.Show("zoom !"); } private void CanZoom(object sender, CanExecuteRoutedEventArgs e) { e.CanExecute = true; } } So here's the problem: right-clicking on the selected row (if it it was selected before the right click) my command comes out disabled. The command is "Zoom" in this case, but can be any other, including a custom one. If I get rid of either docking or UserControl around my grid there are no problems. ListBox doesn't have this issue either. So I don't know what's at fault here. SNOOP shows that in cases when this propagation fails, instead of UserControl, CanExecute is handled by PART_ShowContextMenuButton (Button), which is part of docking header. I've had other issues with UI command propagation within UserControls hosted inside AvalonDock, but this one is the easiest to reproduce.

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• What is it about DataTable Column Names with dots that makes them unsuitable for WPF's DataGrid cont

  - by Tom Ritter

  Run this, and be confused: <Window x:Class="Fucking_Data_Grids.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <StackPanel> <DataGrid Name="r1" ItemsSource="{Binding Path=.}"> </DataGrid> <DataGrid Name="r2" ItemsSource="{Binding Path=.}"> </DataGrid> </StackPanel> </Window> Codebehind: using System.Data; using System.Windows; namespace Fucking_Data_Grids { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); DataTable dt1, dt2; dt1 = new DataTable(); dt2 = new DataTable(); dt1.Columns.Add("a-name", typeof(string)); dt1.Columns.Add("b-name", typeof(string)); dt1.Rows.Add(new object[] { 1, "Hi" }); dt1.Rows.Add(new object[] { 2, "Hi" }); dt1.Rows.Add(new object[] { 3, "Hi" }); dt1.Rows.Add(new object[] { 4, "Hi" }); dt1.Rows.Add(new object[] { 5, "Hi" }); dt1.Rows.Add(new object[] { 6, "Hi" }); dt1.Rows.Add(new object[] { 7, "Hi" }); dt2.Columns.Add("a.name", typeof(string)); dt2.Columns.Add("b.name", typeof(string)); dt2.Rows.Add(new object[] { 1, "Hi" }); dt2.Rows.Add(new object[] { 2, "Hi" }); dt2.Rows.Add(new object[] { 3, "Hi" }); dt2.Rows.Add(new object[] { 4, "Hi" }); dt2.Rows.Add(new object[] { 5, "Hi" }); dt2.Rows.Add(new object[] { 6, "Hi" }); dt2.Rows.Add(new object[] { 7, "Hi" }); r1.DataContext = dt1; r2.DataContext = dt2; } } } I'll tell you what happens. The top datagrid is populated with column headers and data. The bottom datagrid has column headers but all the rows are blank.

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• Java ExecutorService java heap space ptoblems

  - by Sergey Aganezov jr

  I have a little bit of a problem in a multitasking java department. I have a class, called public class ThreadWorker implements Runnable { //some code in here public void run(){ // invokes some recursion method in the ThreadWorker itself, // which will stop eventually { } all in all, pretty simple "worker" that can work on it's on. To work with threads I'm using public static int THREAD_NUMBER = 4; public static ExecutorServide es = Executors.newFixedThreadPool(THREAD_NUMBER); adding instances of ThreadWroker class happens here: public void recursiveMethod(Arraylist<Integers> elements, MyClass data){ if (elements.size() == 0 && data.qualifies()){ ThreadWorker tw = new ThreadWorker(data); es.execute(tw); return; } for (int i=0; i< elements.size(); i++){ // some code to prevent my problem MyClass data1 = new MyClass(data); MyClass data2 = new MyClass(data); ArrayList<Integer> newElements = (ArrayList<Integer>)elements.clone(); data1.update(elements.get(i)); data2.update(-1 * elements.get(i)); newElements.remove(i); recursiveMethod(newElements, data1); recursiveMethod(newElements, data2); { } and the problem is that the depth of the recursion tree is quite big, so as it's width, so a lot of ThreadWorkers are added to the ExecutorService, so after some time on the big input a get Exception in thread "pool-1-thread-2" java.lang.OutOfMemoryError: Java heap space which is caused, as I think because of a ginormous number of ThreadWorkers i'm adding to ExecutorSirvice to be executed, so it runs out of memory. Every ThreadWorker takes about 40 Mb of RAM for all it needs. Is there a method to get how many threads (instances of classes implementing runnable interface) have been added to ExecutorService? So I can add it in the shown above code (int the " // some code to prevent my problem"), as while ("number of threads in the ExecutorService" > 10){ Thread.sleep(10000); } so I won't go to deep or to broad with my recursion and prevent those exception-throwing situations. Sincerely, Sergey Aganezov jr.

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• Python bindings for a vala library

  - by celil

  I am trying to create python bindings to a vala library using the following IBM tutorial as a reference. My initial directory has the following two files: test.vala using GLib; namespace Test { public class Test : Object { public int sum(int x, int y) { return x + y; } } } test.override %% headers #include <Python.h> #include "pygobject.h" #include "test.h" %% modulename test %% import gobject.GObject as PyGObject_Type %% ignore-glob *_get_type %% and try to build the python module source test_wrap.c using the following code build.sh #/usr/bin/env bash valac test.vala -CH test.h python /usr/share/pygobject/2.0/codegen/h2def.py test.h > test.defs pygobject-codegen-2.0 -o test.override -p test test.defs > test_wrap.c However, the last command fails with an error $ ./build.sh Traceback (most recent call last): File "/usr/share/pygobject/2.0/codegen/codegen.py", line 1720, in <module> sys.exit(main(sys.argv)) File "/usr/share/pygobject/2.0/codegen/codegen.py", line 1672, in main o = override.Overrides(arg) File "/usr/share/pygobject/2.0/codegen/override.py", line 52, in __init__ self.handle_file(filename) File "/usr/share/pygobject/2.0/codegen/override.py", line 84, in handle_file self.__parse_override(buf, startline, filename) File "/usr/share/pygobject/2.0/codegen/override.py", line 96, in __parse_override command = words[0] IndexError: list index out of range Is this a bug in pygobject, or is something wrong with my setup? What is the best way to call code written in vala from python? EDIT: Removing the extra line fixed the current problem, but now as I proceed to build the python module, I am facing another problem. Adding the following C file to the existing two in the directory: test_module.c #include <Python.h> void test_register_classes (PyObject *d); extern PyMethodDef test_functions[]; DL_EXPORT(void) inittest(void) { PyObject *m, *d; init_pygobject(); m = Py_InitModule("test", test_functions); d = PyModule_GetDict(m); test_register_classes(d); if (PyErr_Occurred ()) { Py_FatalError ("can't initialise module test"); } } and building with the following script build.sh #/usr/bin/env bash valac test.vala -CH test.h python /usr/share/pygobject/2.0/codegen/h2def.py test.h > test.defs pygobject-codegen-2.0 -o test.override -p test test.defs > test_wrap.c CFLAGS="`pkg-config --cflags pygobject-2.0` -I/usr/include/python2.6/ -I." LDFLAGS="`pkg-config --libs pygobject-2.0`" gcc $CFLAGS -fPIC -c test.c gcc $CFLAGS -fPIC -c test_wrap.c gcc $CFLAGS -fPIC -c test_module.c gcc $LDFLAGS -shared test.o test_wrap.o test_module.o -o test.so python -c 'import test; exit()' results in an error: $ ./build.sh ***INFO*** The coverage of global functions is 100.00% (1/1) ***INFO*** The coverage of methods is 100.00% (1/1) ***INFO*** There are no declared virtual proxies. ***INFO*** There are no declared virtual accessors. ***INFO*** There are no declared interface proxies. Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: ./test.so: undefined symbol: init_pygobject Where is the init_pygobject symbol defined? What have I missed linking to?

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• What's the best way to structure this Linq-to-Events Drag & Drop code?

  - by Rob Fonseca-Ensor

  I am trying to handle a drag & drop interaction, which involves mouse down, mouse move, and mouse up. Here is a simplified repro of my solution that: on mouse down, creates an ellipse and adds it to a canvas on mouse move, repositions the ellipse to follow the mouse on mouse up, changes the colour of the canvas so that it's obvious which one you're dragging. var mouseDown = Observable.FromEvent<MouseButtonEventArgs>(canvas, "MouseLeftButtonDown"); var mouseUp = Observable.FromEvent<MouseButtonEventArgs>(canvas, "MouseLeftButtonUp"); var mouseMove = Observable.FromEvent<MouseEventArgs>(canvas, "MouseMove"); Ellipse ellipse = null; var q = from start in mouseDown.Do(x => { // handle mousedown by creating a red ellipse, // adding it to the canvas at the right position ellipse = new Ellipse() { Width = 10, Height = 10, Fill = Brushes.Red }; Point position = x.EventArgs.GetPosition(canvas); Canvas.SetLeft(ellipse, position.X); Canvas.SetTop(ellipse, position.Y); canvas.Children.Add(ellipse); }) from delta in mouseMove.Until(mouseUp.Do(x => { // handle mouse up by making the ellipse green ellipse.Fill = Brushes.Green; })) select delta; q.Subscribe(x => { // handle mouse move by repositioning ellipse Point position = x.EventArgs.GetPosition(canvas); Canvas.SetLeft(ellipse, position.X); Canvas.SetTop(ellipse, position.Y); }); the XAML is simply <Canvas x:Name="canvas"/> There's a few things I don't like about this code, and I need help refactoring it :) First of all: the mousedown and mouseup callbacks are specified as side effects. If two subscriptions are made to q, they will happen twice. Second, the mouseup callback is specified before the mousemove callback. This makes it a bit hard to read. Thirdly, the reference to the ellipse seems to be in a silly place. If there's two subscriptions, that variable reference will get overwritten quite quickly. I'm sure that there should be some way we can leverage the let keyword to introduce a variable to the linq expression that will mean the correct ellipse reference is available to both the mouse move and mouse up handlers How would you write this code?

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• Flex/Flash 4 datagrid displays raw xml

  - by Setori

  Problem: Flex/Flash4 client (built with FlashBuilder4) displays the xml sent from the server exactly as is - the datagrid keeps the format of the xml. I need the datagrid to parse the input and place the data in the correct rows and columns of the datagrid. flow: click on a date in the tree and it makes a server request for batch information in xml form. Using a CallResponder I then update the datagrid's dataProvider. [code] <fx:Script> <![CDATA[ import mx.controls.Alert; [Bindable]public var selectedTreeNode:XML; public function taskTreeChanged(event:Event):void { selectedTreeNode=Tree(event.target).selectedItem as XML; var searchHubId:String = selectedTreeNode.@hub; var searchDate:String = selectedTreeNode.@lbl; if((searchHubId == "") || (searchDate == "")){ return; } findShipmentBatches(searchDate,searchHubId); } protected function findShipmentBatches(searchDate:String, searchHubId:String):void{ findShipmentBatchesResult.token = actWs.findShipmentBatches(searchDate, searchHubId); } protected function updateBatchDataGridDP():void{ task_list_dg.dataProvider = findShipmentBatchesResult.lastResult; } ]]> </fx:Script> <fx:Declarations> <actws:ActWs id="actWs" fault="Alert.show(event.fault.faultString + '\n' + event.fault.faultDetail)" showBusyCursor="true"/> <s:CallResponder id="findShipmentBatchesResult" result="updateBatchDataGridDP()"/> </fx:Declarations> <mx:AdvancedDataGrid id="task_list_dg" width="100%" height="95%" paddingLeft="0" paddingTop="0" paddingBottom="0"> <mx:columns> <mx:AdvancedDataGridColumn headerText="Receiving date" dataField="rd"/> <mx:AdvancedDataGridColumn headerText="Msg type" dataField="mt"/> <mx:AdvancedDataGridColumn headerText="SSD" dataField="ssd"/> <mx:AdvancedDataGridColumn headerText="Shipping site" dataField="sss"/> <mx:AdvancedDataGridColumn headerText="File name" dataField="fn"/> <mx:AdvancedDataGridColumn headerText="Batch number" dataField="bn"/> </mx:columns> </mx:AdvancedDataGrid> //xml example from server <batches> <batch> <rd>2010-04-23 16:31:00.0</rd> <mt>SC1REVISION01</mt> <ssd>2010-02-18 00:00:00.0</ssd> <sss>100000009</sss> <fn>Revision 1-DF-Ocean-SC1SUM-Quanta-PACT-EMEA-Scheduled Ship Date 20100218.csv</fn> <bn>10041</bn> </batch> <batches> [/code] and the xml is pretty much displayed exactly as is shown in the example above in the datagrid columns... I would appreciate your assistance.

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• My PNG has transparency, but after saving with PHP GD, transparency is lost [closed]

  - by Harry Stroker

  I found the solution to my problem. See below the original post and completely at the bottom my solution. I made a stupid mistake :) First I crop an image and then save it to a png file. Right after this, I also show the image. However, the saved png does not have transparency and the shown one has. What is going on? $this->resource = imagecreatefrompng($this->url); imagealphablending($this->resource, false); imagesavealpha($this->resource, true); $newResource = imagecreatetruecolor($destWidth, $destHeight); imagealphablending($newResource, false); imagesavealpha($newResource, true); $resample = imagecopyresampled($newResource,$this->resource,0,0,$srcX1,$srcY1,$destWidth,$destHeight,$srcX2-$srcX1, $srcY2-$srcY1); imagedestroy($this->resource); $this->resource = $newResource; // SAVING imagepng($this->resource, $destination, 100); // SHOWING header('Content-type: image/png'); imagepng($this->resource); The reason I also save the image is for caching. If the script is executed on a png, it saves a cached png. Next time the image is requested, the png file will be shown, but it has lost its transparency. Even stranger: When I save that cached png image as (within Firefox), it saves it suddenly as a jpg, even though the extension was png. Downloading the cached png using chrome and opening it in Photoshop gives the error: "file-format module cannot parse the file". I will show you the shown PNG and the generated PNG: http://www.foodmuseum.nl/SaveProblemTransparency.png Once I try to show that saved PNG with the GD library, it gives me an error. EDIT NO NO NO NO THIS IS NOT A DUPLICATE!!!... I ALREADY USED THEIR SOLUTION. The solution in the supposedly duplicate works for showing my image. But I also try to save it with the exact same resource, but then it has no transparency. EDIT 2 - SOLUTION I found out what the problem was. It was a stupid mistake. The script I provided above were cut out of a class and placed as sequential code, while in real this is not what exactly happened. The save image function: function saveImage($destination,$quality = 90) { $this->loadResource(); switch($extension){ default: case 'JPG': case 'jpg': imagejpeg($this->resource, $destination, $quality); break; case 'gif': imagegif($this->resource, $destination); break; case 'png': imagepng($this->resource, $destination); break; case 'gd2': imagegd2($this->resource, $destination); break; } } However... $extension does not exist. I fixed it by adding: $extension = $this->getExtension($destination);

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• arp problems with transparent bridge on linux

  - by Mink

  I've been trying to secure my virtual machines on my esx server by putting them behind a transparent bridge with 2 interfaces, one in front, one at the back. My intention is to put all the firewall rules in one place (instead of on each virtual server). I've been using as bridge a blank new virtual machine based on arch linux (but I suspect it doesn't matter which brand of linux it is). What I have is 2 virtual switchs (thus two Virtual Network, VN_front and VN_back), each with 2 types of ports (switched/separated or promiscious/where the machine can see all packets). On my bridge machine, I've set up 2 virtual NIC, one on VN_front, one on VN_back, both in promisc mode. I've created a bridge br0 with both NIC in it: brctl addbr br0 brctl stp br0 off brctl addif br0 front_if brctl addif br0 back_if Then brought them up: ifconfig front_if 0.0.0.0 promisc ifconfig back_if 0.0.0.0 promisc ifconfig br0 0.0.0.0 (I use promisc mode, because I'm not sure I can do without, thinking that maybe the packets don't reach the NICs) Then I took one of my virtual server sitting on VN_front, and plugged it to VN_back instead (that's the nifty use case I'm thinking about, being able to move my servers around just by changing the VN they are plugged into, without changing anything in the configuration). Then I looked into the macs "seen" by my addressless bridge using brctl showmacs br0 and it did show my server from both sides: I get something that looks like this : port no mac addr is local? ageing timer 2 00:0c:29:e1:54:75 no 9.27 1 00:0c:29:fd:86:0c no 9.27 2 00:50:56:90:05:86 no 73.38 1 00:50:56:90:05:88 no 0.10 2 00:50:56:90:05:8b yes 0.00 << FRONT VN 1 00:50:56:90:05:8c yes 0.00 << BACK VN 2 00:50:56:90:19:18 no 13.55 2 00:50:56:90:3c:cf no 13.57 the thing is that the server that are plugged in front/back are not shown on the correct port. I suspect some horrible thing happening in the ARP-world... :-/ If I ping from a front virtual server to a back virtual server, I can only see the back machine if that back machine pings something in the front. As soon as I stop the ping from the back machine, the ping from the front machine stops getting through... I've noticed that if the back machine pings, then its port on the bridge is the correct one... I've tried to play with the arp_ switch of /proc/sys, but with no clear effect on the end result... /proc/sys/net/ipv4/ip_forward doesn't seem to be of any use when using a bridge (seems it's all taken care of by brctl) /proc/sys/net/ipv4/conf//arp_ don't seem to change much either... (tried arp_announce to 2 or 8 - like suggested elsewhere - and arp_ignore to 0 or 1 ) All the examples I've seen have a different subnet on either side like 10.0.1.0/24 and 10.0.2.0/24... In my case I want 10.0.1.0/24 on both side (just like a transparent switch - except it's a hidden fw ). Turning stp on/off doesn't seem to have any impact on my issue. It's as if the arp packets where getting through the bridge, corrupting the other side with false data... I've tried to use the -arp on each interface, br0, front, back... it breaks the thing altogether... I suspect it has something to do with both side being on the same subnet... I've thought about putting all my machine behind the fw, so as to have all the same subnet at the back... but I'm stuck with my provider's gateway standing at the front with part of my subnet (in fact 3 appliance to route the whole subnet), so I'll always have ips from the same subnet on both side, whatever I do... (I'm using fixed front IPs on my delegated subnet). I'm at a loss... -_-'' Thx for your help. (As anyone tried something like this? from within ESXi?) (It's not just a stunt, the idea is to have something like fail2ban running on some servers, sending their banned IP to the bridge/fw so that it too could ban them - saving all the other servers from that same attacker in one go, allowing for some honeypot that would trigger the fw from any kind of suitable response, and stuffs of the sort... I am aware I could use something like snort, but it addresses some completely different kind of problems, in a completely different way... )

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• CSS class not having an effect on a div

  - by ETFairfax

  Hi Peeps, The following is an section of my css file plus some HTML. Can anyone tell me when I put class="containerHeader selected" (as is on Test Header A) the background colour is not being set to Red??? Cheers, ET Fairfax. div#builderContainer { margin-top: 15px; width: 390px; height: 700px; border: solid 0px #CCCCCC; background-repeat: no-repeat; } div#builderContainer .container { display: none; -moz-border-radius: 4px; -webkit-border-radius: 4px; border-radius: 4px; /* Corner radius */ border: solid 1px #999999; } div#builderContainer .container div:hover { background-color: #EEEEEE; } div#builderContainer .containerHeader { -moz-border-radius: 4px; -webkit-border-radius: 4px; border-radius: 4px; background: #93c3cd url(images/ui-bg_diagonals-small_50_93c3cd_40x40.png) 50% 50% repeat; border-bottom: solid 0px #999999; margin: 0px; margin-top: 25px; padding: 10px; /* display: none; */ border: solid 1px #999999; font-weight: bold; font-family: Verdana; background-color: #FFF; cursor: pointer; vertical-align: middle; } div#builderContainer .containerHeader:hover { background: #ccd232 url(images/ui-bg_diagonals-small_75_ccd232_40x40.png) 50% 50% repeat; } div#builderContainer .containerHeader:active { background: #db4865 url(images/ui-bg_diagonals-small_40_db4865_40x40.png) 50% 50% repeat; } div#builderContainer .containerHeader .selected { background-color: Red; } <div id="builderContainer"> <div class="containerHeader selected" id="CHA">Test Header A</div> <div class="container" id="CA"></div> <div class="containerHeader" id="CHB">Test Header B</div> <div class="container" id="CB"></div> </div>

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• Rich Text Editor (YUI Simple Text Editor used) not sending data to next page

  - by Aman Chhabra

  I am using a simple text editor from YUI, but when I click submit the code in the textarea/editor is not sent to the next page. I want to be able to receive it on the subsequent page and then store it in a DB(MySql). I have wasted lot of time already. Please help. HTML FILE: <html> <head> <script type="text/javascript" src="http://yui.yahooapis.com/combo?2.9.0/build/yahoo-dom-event/yahoo-dom-event.js&2.9.0/build/container/container_core-min.js&2.9.0/build/element/element-min.js&2.9.0/build/editor/simpleeditor-min.js"></script> <link rel="stylesheet" type="text/css" href="http://yui.yahooapis.com/2.9.0/build/editor/assets/skins/sam/simpleeditor.css" /> <link rel="stylesheet" type="text/css" href="http://yui.yahooapis.com/2.8.2r1/build/assets/skins/sam/skin.css"> <!-- Utility Dependencies --> <script src="http://yui.yahooapis.com/2.8.2r1/build/yahoo-dom-event/yahoo-dom-event.js"></script> <script src="http://yui.yahooapis.com/2.8.2r1/build/element/element-min.js"></script> <!-- Needed for Menus, Buttons and Overlays used in the Toolbar --> <script src="http://yui.yahooapis.com/2.8.2r1/build/container/container_core-min.js"></script> <script src="http://yui.yahooapis.com/2.8.2r1/build/menu/menu-min.js"></script> <script src="http://yui.yahooapis.com/2.8.2r1/build/button/button-min.js"></script> <!-- Source file for Rich Text Editor--> <script src="http://yui.yahooapis.com/2.8.2r1/build/editor/editor-min.js"></script> <script> YAHOO.util.Event.on('submit', 'click', function() { myEditor.saveHTML(); var html = myEditor.get('element').value; }); (function() { var Dom = YAHOO.util.Dom, Event = YAHOO.util.Event; var myConfig = { height: '200px', width: '900px', dompath: true, }; myEditor = new YAHOO.widget.SimpleEditor('msgpost', myConfig); myEditor.render(); })(); </script> </head> <body class="yui-skin-sam"> <form action="submit.php" method="post"> <textarea name="msgpost" id="msgpost" cols="50" rows="10"></textarea> <input type="submit" value="Submit" onsubmit="return myDoSubmit()"/> </form> </body> </html>

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• SilverLight 3 Beginner question: Scroll with mousewheel and zoom image with panning

  - by JP Hellemons

  Hello, I would like to make a small silverlight app which displays one fairly large image which can be zoomed in by scrolling the mouse and then panned with the mouse. it's similar to the function in google maps and i do not want to use deepzoom. here is what i have at the moment. please keep in mind that this is my first silverlight app: this app is just for me to see it's a good way to build in a website. so it's a demo app and therefor has bad variable names. the initial image is 1800px width. private void sc_MouseWheel(object sender, MouseWheelEventArgs e) { var st = (ScaleTransform)plaatje.RenderTransform; double zoom = e.Delta > 0 ? .1 : -.1; st.ScaleX += zoom; st.ScaleY += zoom; } this works, but could use some smoothing and it's positioned top left and not centered. the panning is like this: found it @ http://stackoverflow.com/questions/741956/wpf-pan-zoom-image and converted it to this below to work in silverlight Point start; Point origin; bool captured = false; private void plaatje_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { plaatje.CaptureMouse(); captured = true; var tt = (TranslateTransform)((TransformGroup)plaatje.RenderTransform) .Children.First(tr => tr is TranslateTransform); start = e.GetPosition(canvasje); origin = new Point(tt.X, tt.Y); } private void plaatje_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { plaatje.ReleaseMouseCapture(); captured = false; } private void plaatje_MouseMove(object sender, MouseEventArgs e) { if (!captured) return; var tt = (TranslateTransform)((TransformGroup)plaatje.RenderTransform).Children.First(tr => tr is TranslateTransform); double xVerschuiving = start.X - e.GetPosition(canvasje).X; double yVerschuiving = start.Y - e.GetPosition(canvasje).Y; tt.X = origin.X - xVerschuiving; tt.Y = origin.Y - yVerschuiving; } so the scaling isn't smooth and the panning isn't working, because when i click it, the image disappears. thanks in advanced!

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• UIScrollView works as expected but scrollRectToVisible: does nothing

  - by mahboudz

  HI. I have used UIScrollView before, and am using it now, and never had a problem. I'm now adding it to an old app, and while it works as expected (I can look at the contents, scroll around with my finger, all the bounds and sizes are setup right so there is no empty space in the content, etc.), I just can't get scrollToRectVisible to work. I have even simplified the call so that it merely moves to the 0,0 position: [scrollView scrollRectToVisible:CGRectMake(0, 0, 10, 10) animated:YES]; or move it to 0,200: [scrollView scrollRectToVisible:CGRectMake(0, 200, 10, 10) animated:YES]; I even made a quick app to test this and I can get scrollRectToVisible to work there as I expect. But in my old app, I can't seem to make it do anything. I can make the scrollView scroll with setContentOffset:, but that's not what I want. This scrollView and its contents are defined in the nib by IB and used with an IBOutlet. The only code I am using in my app to handle the scrollView is [scrollView setContentSize:CGSizeMake(scrollView.contentSize.width, imageView.frame.size.height)]; (I'm only interested in vertical scrolling not horizontal). Has anyone run into a problem like this? I have compared the scrollView attributes in both apps and they are identical. ADDENDUM: My scrollViews frame is: 0.000000 0.000000 480.000000 179.000000 My scrollViews contentSize is: 0.000000 324.000000 It still acts like the rect I want to scroll to is already visible and no scrolling is needed. Not sure if that is what is happening. This is just the darnest thing. Seems like such an easy thing to resolve... ADDENDUM #2: This is how I am making do without scrollRectToVisible: CGPoint point = myRect.origin; if (![clefScrollView pointInside:point withEvent:nil]) { point.x = 0; if (point.y > clefScrollView.contentSize.height - clefScrollView.bounds.size.height) point.y = clefScrollView.contentSize.height - clefScrollView.bounds.size.height; [clefScrollView setContentOffset:point animated: YES]; } Everything else about this scrollView works as expected, but scrollRectToVisible. WHY?!? Any wild guesses?

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• How do I use connect to DB2 with DBI and mod_perl?

  - by Matthew

  I'm having issues with getting DBI's IBM DB2 driver to work with mod_perl. My test script is: #!/usr/bin/perl use strict; use CGI; use Data::Dumper; use DBI; { my $q; my $dsn; my $username; my $password; my $sth; my $dbc; my $row; $q = CGI->new; print $q->header; print $q->start_html(); $dsn = "DBI:DB2:SAMPLE"; $username = "username"; $password = "password"; print "<pre>".$q->escapeHTML(Dumper(\%ENV))."</pre>"; $dbc = DBI->connect($dsn, $username, $password); $sth = $dbc->prepare("SELECT * FROM SOME_TABLE WHERE FIELD='SOMETHING'"); $sth->execute(); $row = $sth->fetchrow_hashref(); print "<pre>".$q->escapeHTML(Dumper($row))."</pre>"; print $q->end_html; } This script works as CGI but not under mod_perl. I get this error in apache's error log: DBD::DB2::dr connect warning: [unixODBC][Driver Manager]Data source name not found, and no default driver specified at /usr/lib/perl5/site_perl/5.8.8/Apache/DBI.pm line 190. DBI connect('SAMPLE','username',...) failed: [unixODBC][Driver Manager]Data source name not found, and no default driver specified at /data/www/perl/test.pl line 15 First of all, why is it using ODBC? The native DB2 driver is installed (hence it works as CGI). Running Apache 2.2.3, mod_perl 2.0.4 under RHEL5. This guy had the same problem as me: http://www.mail-archive.com/[email protected]/msg22909.html But I have no idea how he fixed it. What does mod_php4 have to do with mod_perl? Any help would be greatly appreciated, I'm having no luck with google. Update: As james2vegas pointed out, the problem has something to do with PHP: I disable PHP all together I get the a different error: Total Environment allocation failure! Did you set up your DB2 client environment? I believe this error is to do with environment variables not being set up correctly, namely DB2INSTANCE. However, I'm not able to turn off PHP to resolve this problem (I need it for some legacy applications). So I now have 2 questions: How can I fix the original issue without disabling PHP all together? How can I fix the environment issue? I've set DB2INSTANCE, DB2_PATH and SQLLIB variables correctly using SetEnv and PerlSetEnv in httpd.conf, but with no luck. Note: I've edited the code to determine if the problem was to do with Global Variable Persistence.

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• i had problem in adding the additional content in my pdf

  - by Ayyappan.Anbalagan

  I am converting my data set into a pdf document.My data set contains the product bill details.So,at the top of the pdf i need to added some more content like "my company name & address customer name, date of bill,bill no" Below code i am using to convert into pdf. public static void Exportdata(DataTable dataTable, HttpResponse Response, int val) { //String filename = String.Concat(name, "-", DateTime.Today.Day.ToString(), "/", DateTime.Today.Month.ToString(), "/", DateTime.Today.Year.ToString(), ".pdf"); Document pdfDoc = new Document(PageSize.A4, 30, 30, 40, 25); System.IO.MemoryStream mStream = new System.IO.MemoryStream(); PdfWriter writer = PdfWriter.GetInstance(pdfDoc, mStream); //int cols = 0; //int rows = 0; int cols = dataTable.Columns.Count; int rows = dataTable.Rows.Count; pdfDoc.Open(); iTextSharp.text.Table pdfTable = new iTextSharp.text.Table(cols, rows); pdfTable.BorderWidth = 1; pdfTable.Width = 100; pdfTable.Padding = 1; pdfTable.Spacing = 1; //creating table headers for (int i = 0; i < cols; i++) { Cell cellCols = new Cell(); Font ColFont = FontFactory.GetFont(FontFactory.HELVETICA, 8, Font.BOLD); Chunk chunkCols = new Chunk(dataTable.Columns[i].ColumnName, ColFont); cellCols.Add(chunkCols); pdfTable.AddCell(cellCols); } //creating table data (actual result) for (int k = 0; k < rows; k++) { for (int j = 0; j < cols; j++) { Cell cellRows = new Cell(); Font RowFont = FontFactory.GetFont(FontFactory.HELVETICA, 6); Chunk chunkRows = new Chunk(dataTable.Rows[k][j].ToString(), RowFont); cellRows.Add(chunkRows); pdfTable.AddCell(cellRows); } } pdfDoc.Add(pdfTable); pdfDoc.Close(); Response.ContentType = "application/octet-stream"; if (val == 1) { Response.AddHeader("Content-Disposition", "attachment; filename=Users.pdf"); } else if (val == 2) { Response.AddHeader("Content-Disposition", "attachment; filename=Customers.pdf"); } else if (val == 3) { Response.AddHeader("Content-Disposition", "attachment; filename=Materials.pdf"); } else { Response.AddHeader("Content-Disposition", "attachment; filename=Reports.pdf"); } Response.Clear(); Response.BinaryWrite(mStream.ToArray()); //Response.Write(mStream.ToString()); HttpContext.Current.ApplicationInstance.CompleteRequest(); Response.End(); }

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• EXT-GWT Portal: How to get all Portlets?

  - by Lars

  Hi all this is my first Question here! Im just making my first steps with (Ext-) GWT. I´m testing the Ext-GWT libraries and really: These are absolute great! Now my question: Is it possible to make a kind of "clear-Portal" or "hide all portles" for a defined Portal? Or have i always manually clear the portal like in my example code above? My sample code looks like this: //define the Portal, 2 columns, each 50% auf width, with borders and Backgroundcolor portal = new Portal(2); portal.setBorders(true); portal.setStyleAttribute("backgroundColor", "white"); portal.setColumnWidth(0, .50); portal.setColumnWidth(1, .50); //define a Portlet for showing all Users portletUser = new Portlet(); portletUser.setHeading("Benutzer"); configPanel(portletUser); portletUser.setLayout(new FitLayout()); CompUserList compUserList = new CompUserList(); portletUser.add(compUserList); portletUser.setHeight(250); //define a Portlet for showing all Vehicles portletVehicles = new Portlet(); portletVehicles.setHeading("Fahrzeuge"); configPanel(portletVehicles); portletVehicles.setLayout(new FitLayout()); CompVehicleList compVehicleList = new CompVehicleList(); portletVehicles.add(compVehicleList); portletVehicles.setHeight(250); //define a portlet for showing all countries portletCountries = new Portlet(); portletCountries.setHeading("Länder"); configPanel(portletCountries); portletCountries.setLayout(new FitLayout()); CompCountryList compCountryList = new CompCountryList(); portletCountries.add(compCountryList); portletCountries.setHeight(250); //add both Portlets to Portal portal.add(portletUser, 0); portal.add(portletVehicles, 1); So first of all this works fine and looks great :-) Now i have a a button in a accordeon menu. The Listener on this button should hide all portlets in the portal (at this time its the portletUser and portletVehicles) and then add another portlet (for example the portletCountries): portletUser.hide(); portletVehicles.hide(); portal.add(portletCountries, 0) Question from above again ;-) Is it possible to make a kind of "clear-Portal" or "hide all portles" for a defined Portal? Or have i always manually clear the portal like in my example code above? What is the best practice for this functionallity? Thanks all for your tips! Lars.

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• How do you make a CSS-defined table-cell scroll?

  - by Giffyguy

  I want to be able to set the height of the table, and force the cells to scroll individually if they are larger than the table. Consider the following code: (see it in action here) <div style="display: table; position: absolute; width: 25%; height: 80%; min-height: 80%; max-height: 80%; left: 0%; top: 10%; right: 75%; bottom: 10%; border: solid 1px black;"> <div style="display: table-row;"> <div style="display: table-cell; border: solid 1px blue;"> {Some dynamic text content}<br/> This cell should shrink to fit it's contents. </div> </div> <div style="display: table-row;"> <div style="display: table-cell; border: solid 1px red; overflow: scroll;"> This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. </div> </div> </div> If you open this code (in IE8, in my case) you'll notice that the second cell fits in the table nicely when the browser is maximized. In theory, when you shrink the browser (forcing the table to shrink as well), a vertical scrollbar should appear INSIDE the second cell when the table becomes too small to fit all of the content. But in reality, the table just grows vertically, beyond the bounds set by the CSS height attribute(s). Hopefully I've explained this scenario adequately... Does anyone know how I can get this to work?

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• How do you make a CSS-defined table-cell scroll?

  - by Giffyguy

  I want to be able to set the height of the table, and force the cells to scroll individually if they are larger than the table. Consider the following code: (see it in action here) <div style="display: table; position: absolute; width: 25%; height: 80%; min-height: 80%; max-height: 80%; left: 0%; top: 10%; right: 75%; bottom: 10%; border: solid 1px black;"> <div style="display: table-row;"> <div style="display: table-cell; border: solid 1px blue;"> {Some dynamic text content}<br/> This cell should shrink to fit it's contents. </div> </div> <div style="display: table-row;"> <div style="display: table-cell; border: solid 1px red; overflow: scroll;"> This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. This should only take up the remainder of the table's vertical space. </div> </div> </div> If you open this code (in IE8, in my case) you'll notice that the second cell fits in the table nicely when the browser is maximized. In theory, when you shrink the browser (forcing the table to shrink as well), a vertical scrollbar should appear INSIDE the second cell when the table becomes too small to fit all of the content. But in reality, the table just grows vertically, beyond the bounds set by the CSS height attribute(s). Hopefully I've explained this scenario adequately... Does anyone know how I can get this to work?

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• How to limit JTextArea max Rows and Coloums?

  - by Billbo bug

  I am using JTextArea in JScrollPane I want to limit the maximum number of lines possible and the maximum chars in each line. I need that the string will be exactly like on the screen, each line will end with '\n' (if there another line after it) and the user will be able to insert only X lines and Y chars in each line. I tried to limit the lines but i don't know exactly how many lines do i have because of the line wrapping, The line wrapping is starting new line visualy on the screen(because of the width of the JTextArea) but in the string of the component it is really the same line with no '\n' to indicate new line. I do not have an idea how to limit the max chars in each line while typing. There are 2 stages: The typing of the string- keep that the user will not be able to type more then X lines and Y chars in each line. (even if the line wrap only visualy or the user typed '/n') Insert the string to the DB- after cliking 'OK' convert the string that every line will end with "/n" even if the user did not typed it and the line was wrapped only visualy. There are few problems if i will count the chars in the line and insert '/n' in the end of the line, thats why i decided to do it in two stages. In the first stage ehile the user is typing i would rather only limit it visualy and force line wrpping or something similar. Only in the second stage when i save string i will add the '/n' even if the user did not typed it in the end of the lines! Does anyone have an idea? I know that i will have to use DocumentFilter OR StyledDocument. Here is sample code that limit only the lines to 3:(but not the chars in row to 19) private JTextArea textArea ; textArea = new JTextArea(3,19); textArea .setLineWrap(true); textArea .setDocument(new LimitedStyledDocument(3)); JScrollPane scrollPane = new JScrollPane(textArea public class LimitedStyledDocument extends DefaultStyledDocument /** Field maxCharacters */ int maxLines; public LimitedStyledDocument(int maxLines) { maxCharacters = maxLines; } public void insertString(int offs, String str, AttributeSet attribute) throws BadLocationException { Element root = this.getDefaultRootElement(); int lineCount = getLineCount(str); if (lineCount + root.getElementCount() <= maxLines){ super.insertString(offs, str, attribute); } else { Toolkit.getDefaultToolkit().beep(); } } /** * get Line Count * * @param str * @return the count of '\n' in the String */ private int getLineCount(String str){ String tempStr = new String(str); int index; int lineCount = 0; while (tempStr.length() > 0){ index = tempStr.indexOf("\n"); if(index != -1){ lineCount++; tempStr = tempStr.substring(index+1); } else{ break; } } return lineCount; } }

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• How to detect page zoom level in all modern browsers?

  - by understack

  How can I detect page zoom level in all modern browsers? While this thread tells how to do it in IE7 and IE8, I can't find good solution for FF, Safari and Chrome. For FF one of the suggested solution FF stores page zoom level for future. So on first page load would I be able to get zoom level? Somewhere I read it works if you're changing zoom level on that page after its loaded. Is there a way to trap 'zoom' event? I need this because some of my calculations are based on no of pixels and they get changed on Zoom. Thanks. Modified sample given by tfl. This would alert different height based on zoom level. <html> <head> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.1/jquery.min.js" type="text/javascript"/></script> <title></title> </head> <body> <div id="xy" style="border:1px solid #f00; width:100px;"> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque sollicitudin tortor in lacus tincidunt volutpat. Integer dignissim imperdiet mollis. Suspendisse quis tortor velit, placerat tempor neque. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Praesent bibendum auctor lorem vitae tempor. Nullam condimentum aliquam elementum. Nullam egestas gravida elementum. Maecenas mattis molestie nisl sit amet vehicula. Donec semper tristique blandit. Vestibulum adipiscing placerat mollis. </div> <div> <button onclick="alert($('#xy').height());">Show</button> </div> </body> </html>

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• load google annotated chart within jquery ui tab content via ajax method

  - by twmulloy

  Hi, I am encountering an issue with trying to load a google annotated chart (http://code.google.com/apis/visualization/documentation/gallery/annotatedtimeline.html) within a jquery ui tab using content via ajax method (http://jqueryui.com/demos/tabs/#ajax). If instead I use the default tabs functionality, writing out the code things work fine: <div id="tabs"> <ul> <li><a href="#tabs-1">Chart</a></li> </ul> <div id="tabs-1"> <script type="text/javascript"> google.load('visualization', '1', {'packages':['annotatedtimeline']}); google.setOnLoadCallback(drawChart); function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('date', 'Date'); data.addColumn('number', 'cloudofinc.com'); data.addColumn('string', 'header'); data.addColumn('string', 'text') data.addColumn('number', 'All Clients'); data.addRows([ [new Date('May 12, 2010'), 2, '2 New Users', '', 3], [new Date('May 13, 2010'), 0, undefined, undefined, 0], [new Date('May 14, 2010'), 0, undefined, undefined, 0], ]); var chart = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_users')); chart.draw(data, { displayAnnotations: false, fill: 10, thickness: 1 }); } </script> <div id='chart_users' style='width: 100%; height: 400px;'></div> </div> </div> But if I use the ajax method for jquery ui tab and point to the partial for the tab, it doesn't work completely. The page renders and once the chart loads, the browser window goes white. However, you can see the tab partial flash just before the chart appears to finish rendering (the chart never actually displays). I have verified that the partial is indeed loading properly without the chart. <div id="tabs"> <ul> <li><a href="ajax/tabs-1">Chart</a></li> </ul> </div>

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• PyGTK: dynamic label wrapping

  - by detly

  It's a known bug/issue that a label in GTK will not dynamically resize when the parent changes. It's one of those really annoying small details, and I want to hack around it if possible. I followed the approach at 16 software, but as per the disclaimer you cannot then resize it smaller. So I attempted a trick mentioned in one of the comments (the set_size_request call in the signal callback), but this results in some sort of infinite loop (try it and see). Does anyone have any other ideas? (You can't block the signal just for the duration of the call, since as the print statements seem to indicate, the problem starts after the function is left.) The code is below. You can see what I mean if you run it and try to resize the window larger and then smaller. (If you want to see the original problem, comment out the line after "Connect to the size-allocate signal", run it, and resize the window bigger.) The Glade file ("example.glade"): <?xml version="1.0"?> <glade-interface> <!-- interface-requires gtk+ 2.16 --> <!-- interface-naming-policy project-wide --> <widget class="GtkWindow" id="window1"> <property name="visible">True</property> <signal name="destroy" handler="on_destroy"/> <child> <widget class="GtkLabel" id="label1"> <property name="visible">True</property> <property name="label" translatable="yes">In publishing and graphic design, lorem ipsum[p][1][2] is the name given to commonly used placeholder text (filler text) to demonstrate the graphic elements of a document or visual presentation, such as font, typography, and layout. The lorem ipsum text, which is typically a nonsensical list of semi-Latin words, is a hacked version of a Latin text by Cicero, with words/letters omitted and others inserted, but not proper Latin[1][2] (see below: History and discovery). The closest English translation would be "pain itself" (dolorem = pain, grief, misery, suffering; ipsum = itself).</property> <property name="wrap">True</property> </widget> </child> </widget> </glade-interface> The Python code: #!/usr/bin/python import pygtk import gobject import gtk.glade def wrapped_label_hack(gtklabel, allocation): print "In wrapped_label_hack" gtklabel.set_size_request(allocation.width, -1) # If you uncomment this, we get INFINITE LOOPING! # gtklabel.set_size_request(-1, -1) print "Leaving wrapped_label_hack" class ExampleGTK: def __init__(self, filename): self.tree = gtk.glade.XML(filename, "window1", "Example") self.id = "window1" self.tree.signal_autoconnect(self) # Connect to the size-allocate signal self.get_widget("label1").connect("size-allocate", wrapped_label_hack) def on_destroy(self, widget): self.close() def get_widget(self, id): return self.tree.get_widget(id) def close(self): window = self.get_widget(self.id) if window is not None: window.destroy() gtk.main_quit() if __name__ == "__main__": window = ExampleGTK("example.glade") gtk.main()

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• Dotted Border turns to solid if object is animated with jQuery.

  - by Serg Chernata

  I have a simple setup: an image and then a paragraph with a bit of info that is hidden and then slides up over the image on mouse hover. If I try to apply a border-top that is dashed or dotted onto the paragraph it simply turns into a solid line. Is this a known issue with a fix? I even tried adding the dotted border through jQuery and it still comes out as a solid line. <div class="wrap"> <img src="images/fillertxt.jpg" alt="image" /> <img src="images/filler.jpg" class="front" alt="image" /> <p class="info"> This is a short description with a bit of text. </p> </div> .wrap .info { width:204px; height:50px; background:url(images/infobg.jpg) repeat-x #8d9c0c; color:#f7f5ef; padding:3px; position:absolute; top:142px; left:0; border-top:3px dotted #8d9c0c; } $(document).ready(function(){ $("p.info").css("border-top","3px dotted #8d9c0c"); $(function(){ bindTypeOne(); $("input[type=radio]").click(function(){ if ($(this).attr("rel") == "type1"){ bindTypeOne(); } else if ($(this).attr("rel") == "type2"){ bindTypeTwo(); } }); }); function bindTypeOne() { $("div.wrap").hover(function(){ $(this).children("p.info").stop(); $(this).children(".front").stop().animate({"top":"141px"}, 400); },function(){ $(this).children("p.info").stop(); $(this).children(".front").stop().animate({"top":"0"}, 700); }); }; function bindTypeTwo() { $("div.wrap").hover(function(){ $(this).children(".front").stop(); $(this).children("p.info").stop().animate({"top":"80px","border-top":"3px dotted #8d9c0c"}, 400); },function(){ $(this).children(".front").stop(); $(this).children("p.info").stop().animate({"top":"142px"}, 700); }); }; });

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• IErrorHandler doesn't seem to be handling my errors in WCF .. any ideas?

  - by John Nicholas

  Have been readign around on IErrorHandler and want to go the config route. so, I have read the following in an attempt to implement it. MSDN Keyvan Nayyeri blog about the type defintion Rory Primrose Blog I have got it to compile and from the various errors i have fixed it seems like WCF is actually loading the error handler. My problem is that the exception that i am throwing to handle in the error handler doesn;t get the exception passed to it. My service implementation simply calls a method on another class that throws ArgumentOutOfRangeException - however this exception never gets handled by the handler. My web.config <system.serviceModel> <bindings> <basicHttpBinding> <binding name="basic"> <security mode="None" /> </binding> </basicHttpBinding> </bindings> <extensions> <behaviorExtensions> <add name="customHttpBehavior" type="ErrorHandlerTest.ErrorHandlerElement, ErrorHandlerTest, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" /> </behaviorExtensions> </extensions> <behaviors> <serviceBehaviors> <behavior name="exceptionHandlerBehaviour"> <serviceMetadata httpGetEnabled="true"/> <!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information --> <serviceDebug includeExceptionDetailInFaults="true"/> <customHttpBehavior /> </behavior> </serviceBehaviors> </behaviors> <services> <service behaviorConfiguration="exceptionHandlerBehaviour" name="ErrorHandlerTest.Service1"> <endpoint binding="basicHttpBinding" bindingConfiguration="basic" contract="ErrorHandlerTest.IService1" /> </service> </services> Service Contract [ServiceContract] public interface IService1 { [OperationContract] [FaultContract(typeof(GeneralInternalFault))] string GetData(int value); } The ErrorHandler class public class ErrorHandler : IErrorHandler , IServiceBehavior { public bool HandleError(Exception error) { Console.WriteLine("caught exception {0}:",error.Message ); return true; } public void ProvideFault(Exception error, MessageVersion version, ref Message fault) { if (fault!=null ) { if (error is ArgumentOutOfRangeException ) { var fe = new FaultException<GeneralInternalFault>(new GeneralInternalFault("general internal fault.")); MessageFault mf = fe.CreateMessageFault(); fault = Message.CreateMessage(version, mf, fe.Action); } else { var fe = new FaultException<GeneralInternalFault>(new GeneralInternalFault(" the other general internal fault.")); MessageFault mf = fe.CreateMessageFault(); fault = Message.CreateMessage(version, mf, fe.Action); } } } public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters) { } public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase) { IErrorHandler errorHandler = new ErrorHandler(); foreach (ChannelDispatcherBase channelDispatcherBase in serviceHostBase.ChannelDispatchers) { ChannelDispatcher channelDispatcher = channelDispatcherBase as ChannelDispatcher; if (channelDispatcher != null) { channelDispatcher.ErrorHandlers.Add(errorHandler); } } } public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase) { } } And the Behaviour Extension Element public class ErrorHandlerElement : BehaviorExtensionElement { protected override object CreateBehavior() { return new ErrorHandler(); } public override Type BehaviorType { get { return typeof(ErrorHandler); } } }

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• jquery css menu not selecting the active link

  - by Ronedog

  What is wrong with this and how could I fix it. I have css menu (horizontal) that I want the background and font to be changed when one of the items is selected. I found another post that gave me some jquery code to help make it work, and I thought I had it coded right, but when I click on an item to change its class it adds the class, but the background and font stay the same? Any ideas here? Heres the HTML <ul id="menu_nav" class="buttons"> <li> <a href="#" onclick="' . $menu_path . '">Item 1</a> </li> <li> <a href="#" onclick="' . $menu_path . '">Item 2</a> </li> <li> <a href="#" onclick="' . $menu_path . '">Item 3</a> </li> </ul> Heres the CSS: ul#menu_nav { float:left; width:790px; padding:0; margin:0; list-style-type:none; background-color:#000099; } ul#menu_nav a { float:left; text-decoration:none; color:white; background-color:#000099; padding:0.2em 0.6em; border-right:1px solid #CCCCCC; font-family: Tahoma; font-size: 11px; font-style: normal; font-weight: bold; position: relative; height: 21px; line-height:1.85em; } ul#menu_nav a:hover { background-color:#F1F4FE; color:#000099; border-top:1px solid #CCCCCC; } ul#menu_nav li {display:inline;} .selected { background-color:#F1F4FE; color:#000099; border-top:1px solid #CCCCCC; } Here's the Jquery: $(function(){ $(".buttons li>a").click(function(){ $(this).parent().addClass('selected'). // <li> siblings().removeClass('selected'); }); });

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