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  • Why do I get a NullReferenceException when using a style on a ContentPresenter?

    - by Robert Rossney
    I've created this template, which uses a style applied to the ContentPresenter so that I can bind the data object's Column property to Grid.Column, allowing the items to determine for themselves which column of the Grid they go into: <DataTemplate DataType="{x:Type local:MyObject}"> <ItemsControl ItemsSource="{Binding Items}"> <ItemsControl.Resources> <Style TargetType="{x:Type ContentPresenter}"> <Setter Property="Grid.Column" Value="{Binding Column}" /> </Style> </ItemsControl.Resources> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> <ColumnDefinition Width="*" /> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> </Grid> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> </ItemsControl> </DataTemplate> When I run the program, I get a NullReferenceException. The beginning of the hilariously long stack trace: at System.Windows.StyleHelper.ApplyAutoAliasRules(OptimizedTemplateContent optimizedTemplateContent, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& resourceDependents, HybridDictionary& dataTriggerRecordFromBinding, Boolean& hasInstanceValues) at System.Windows.StyleHelper.ProcessTemplateContent(FrameworkTemplate frameworkTemplate, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& resourceDependents, ItemStructList`1& eventDependents, HybridDictionary& dataTriggerRecordFromBinding, HybridDictionary childIndexFromChildID, Boolean& hasInstanceValues) at System.Windows.StyleHelper.SealTemplate(FrameworkTemplate frameworkTemplate, Boolean& isSealed, FrameworkElementFactory templateRoot, TriggerCollection triggers, ResourceDictionary resources, HybridDictionary childIndexFromChildID, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& containerDependents, FrugalStructList`1& resourceDependents, ItemStructList`1& eventDependents, HybridDictionary& triggerActions, HybridDictionary& dataTriggerRecordFromBinding, Boolean& hasInstanceValues, EventHandlersStore& eventHandlersStore) at System.Windows.FrameworkTemplate.Seal() at System.Windows.StyleHelper.UpdateTemplateCache(FrameworkElement fe, FrameworkTemplate oldTemplate, FrameworkTemplate newTemplate, DependencyProperty templateProperty) at System.Windows.Controls.ContentPresenter.OnTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) ...etc. It's not the binding. I still get the error if I explicitly set the value in the style's setter to 0, say. And the error vanishes if I remove the style, though then all of the items end up in column 0. What's going on here? And how do I debug a problem like this?

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  • Have I taken a wrong path in programming by being excessively worried about code elegance and style?

    - by Ygam
    I am in a major stump right now. I am a BSIT graduate, but I only started actual programming less than a year ago. I observed that I have the following attitude in programming: I tend to be more of a purist, scorning unelegant approaches to solving problems using code I tend to look at anything in a large scale, planning everything before I start coding, either in simple flowcharts or complex UML charts I have a really strong impulse on refactoring my code, even if I miss deadlines or prolong development times I am obsessed with good directory structures, file naming conventions, class, method, and variable naming conventions I tend to always want to study something new, even, as I said, at the cost of missing deadlines I tend to see software development as something to engineer, to architect; that is, seeing how things relate to each other and how blocks of code can interact (I am a huge fan of loose coupling) i.e the OOP thinking I tend to combine OOP and procedural coding whenever I see fit I want my code to execute fast (thus the elegant approaches and refactoring) This bothers me because I see my colleagues doing much better the other way around (aside from the fact that they started programming since our first year in college). By the other way around I mean, they fire up coding, gets the job done much faster because they don't have to really look at how clean their codes are or how elegant their algorithms are, they don't bother with OOP however big their projects are, they mostly use web APIs, piece them together and voila! Working code! CLients are happy, they get paid fast, at the expense of a really unmaintainable or hard-to-read code that lacks structure and conventions, or slow executions of certain actions (which the common reasoning against would be that internet connections are much faster these days, hardware is more powerful). The excuse I often receive is clients don't care about how you write the code, but they do care about how long you deliver it. If it works then all is good. Now, did my "purist" approach to programming may have been the wrong way to start programming? Should I just dump these purist concepts and just code the hell up because I have seen it: clients don't really care how beautifully coded it is?

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  • Creating a thematic map

    - by jsharma
    This post describes how to create a simple thematic map, just a state population layer, with no underlying map tile layer. The map shows states color-coded by total population. The map is interactive with info-windows and can be panned and zoomed. The sample code demonstrates the following: Displaying an interactive vector layer with no background map tile layer (i.e. purpose and use of the Universe object) Using a dynamic (i.e. defined via the javascript client API) color bucket style Dynamically changing a layer's rendering style Specifying which attribute value to use in determining the bucket, and hence style, for a feature (FoI) The result is shown in the screenshot below. The states layer was defined, and stored in the user_sdo_themes view of the mvdemo schema, using MapBuilder. The underlying table is defined as SQL> desc states_32775  Name                                      Null?    Type ----------------------------------------- -------- ----------------------------  STATE                                              VARCHAR2(26)  STATE_ABRV                                         VARCHAR2(2) FIPSST                                             VARCHAR2(2) TOTPOP                                             NUMBER PCTSMPLD                                           NUMBER LANDSQMI                                           NUMBER POPPSQMI                                           NUMBER ... MEDHHINC NUMBER AVGHHINC NUMBER GEOM32775 MDSYS.SDO_GEOMETRY We'll use the TOTPOP column value in the advanced (color bucket) style for rendering the states layers. The predefined theme (US_STATES_BI) is defined as follows. SQL> select styling_rules from user_sdo_themes where name='US_STATES_BI'; STYLING_RULES -------------------------------------------------------------------------------- <?xml version="1.0" standalone="yes"?> <styling_rules highlight_style="C.CB_QUAL_8_CLASS_DARK2_1"> <hidden_info> <field column="STATE" name="Name"/> <field column="POPPSQMI" name="POPPSQMI"/> <field column="TOTPOP" name="TOTPOP"/> </hidden_info> <rule column="TOTPOP"> <features style="states_totpop"> </features> <label column="STATE_ABRV" style="T.BLUE_SERIF_10"> 1 </label> </rule> </styling_rules> SQL> The theme definition specifies that the state, poppsqmi, totpop, state_abrv, and geom columns will be queried from the states_32775 table. The state_abrv value will be used to label the state while the totpop value will be used to determine the color-fill from those defined in the states_totpop advanced style. The states_totpop style, which we will not use in our demo, is defined as shown below. SQL> select definition from user_sdo_styles where name='STATES_TOTPOP'; DEFINITION -------------------------------------------------------------------------------- <?xml version="1.0" ?> <AdvancedStyle> <BucketStyle> <Buckets default_style="C.S02_COUNTRY_AREA"> <RangedBucket seq="0" label="10K - 5M" low="10000" high="5000000" style="C.SEQ6_01" /> <RangedBucket seq="1" label="5M - 12M" low="5000001" high="1.2E7" style="C.SEQ6_02" /> <RangedBucket seq="2" label="12M - 20M" low="1.2000001E7" high="2.0E7" style="C.SEQ6_04" /> <RangedBucket seq="3" label="&gt; 20M" low="2.0000001E7" high="5.0E7" style="C.SEQ6_05" /> </Buckets> </BucketStyle> </AdvancedStyle> SQL> The demo defines additional advanced styles via the OM.style object and methods and uses those instead when rendering the states layer.   Now let's look at relevant snippets of code that defines the map extent and zoom levels (i.e. the OM.universe),  loads the states predefined vector layer (OM.layer), and sets up the advanced (color bucket) style. Defining the map extent and zoom levels. function initMap() {   //alert("Initialize map view");     // define the map extent and number of zoom levels.   // The Universe object is similar to the map tile layer configuration   // It defines the map extent, number of zoom levels, and spatial reference system   // well-known ones (like web mercator/google/bing or maps.oracle/elocation are predefined   // The Universe must be defined when there is no underlying map tile layer.   // When there is a map tile layer then that defines the map extent, srid, and zoom levels.      var uni= new OM.universe.Universe(     {         srid : 32775,         bounds : new OM.geometry.Rectangle(                         -3280000, 170000, 2300000, 3200000, 32775),         numberOfZoomLevels: 8     }); The srid specifies the spatial reference system which is Equal-Area Projection (United States). SQL> select cs_name from cs_srs where srid=32775 ; CS_NAME --------------------------------------------------- Equal-Area Projection (United States) The bounds defines the map extent. It is a Rectangle defined using the lower-left and upper-right coordinates and srid. Loading and displaying the states layer This is done in the states() function. The full code is at the end of this post, however here's the snippet which defines the states VectorLayer.     // States is a predefined layer in user_sdo_themes     var  layer2 = new OM.layer.VectorLayer("vLayer2",     {         def:         {             type:OM.layer.VectorLayer.TYPE_PREDEFINED,             dataSource:"mvdemo",             theme:"us_states_bi",             url: baseURL,             loadOnDemand: false         },         boundingTheme:true      }); The first parameter is a layer name, the second is an object literal for a layer config. The config object has two attributes: the first is the layer definition, the second specifies whether the layer is a bounding one (i.e. used to determine the current map zoom and center such that the whole layer is displayed within the map window) or not. The layer config has the following attributes: type - specifies whether is a predefined one, a defined via a SQL query (JDBC), or in a json-format file (DATAPACK) theme - is the predefined theme's name url - is the location of the mapviewer server loadOnDemand - specifies whether to load all the features or just those that lie within the current map window and load additional ones as needed on a pan or zoom The code snippet below dynamically defines an advanced style and then uses it, instead of the 'states_totpop' style, when rendering the states layer. // override predefined rendering style with programmatic one    var theRenderingStyle =      createBucketColorStyle('YlBr5', colorSeries, 'States5', true);   // specify which attribute is used in determining the bucket (i.e. color) to use for the state   // It can be an array because the style could be a chart type (pie/bar)   // which requires multiple attribute columns     // Use the STATE.TOTPOP column (aka attribute) value here    layer2.setRenderingStyle(theRenderingStyle, ["TOTPOP"]); The style itself is defined in the createBucketColorStyle() function. Dynamically defining an advanced style The advanced style used here is a bucket color style, i.e. a color style is associated with each bucket. So first we define the colors and then the buckets.     numClasses = colorSeries[colorName].classes;    // create Color Styles    for (var i=0; i < numClasses; i++)    {         theStyles[i] = new OM.style.Color(                      {fill: colorSeries[colorName].fill[i],                        stroke:colorSeries[colorName].stroke[i],                       strokeOpacity: useGradient? 0.25 : 1                      });    }; numClasses is the number of buckets. The colorSeries array contains the color fill and stroke definitions and is: var colorSeries = { //multi-hue color scheme #10 YlBl. "YlBl3": {   classes:3,                  fill: [0xEDF8B1, 0x7FCDBB, 0x2C7FB8],                  stroke:[0xB5DF9F, 0x72B8A8, 0x2872A6]   }, "YlBl5": {   classes:5,                  fill:[0xFFFFCC, 0xA1DAB4, 0x41B6C4, 0x2C7FB8, 0x253494],                  stroke:[0xE6E6B8, 0x91BCA2, 0x3AA4B0, 0x2872A6, 0x212F85]   }, //multi-hue color scheme #11 YlBr.  "YlBr3": {classes:3,                  fill:[0xFFF7BC, 0xFEC44F, 0xD95F0E],                  stroke:[0xE6DEA9, 0xE5B047, 0xC5360D]   }, "YlBr5": {classes:5,                  fill:[0xFFFFD4, 0xFED98E, 0xFE9929, 0xD95F0E, 0x993404],                  stroke:[0xE6E6BF, 0xE5C380, 0xE58A25, 0xC35663, 0x8A2F04]     }, etc. Next we create the bucket style.    bucketStyleDef = {       numClasses : colorSeries[colorName].classes, //      classification: 'custom',  //since we are supplying all the buckets //      buckets: theBuckets,       classification: 'logarithmic',  // use a logarithmic scale       styles: theStyles,       gradient:  useGradient? 'linear' : 'off' //      gradient:  useGradient? 'radial' : 'off'     };    theBucketStyle = new OM.style.BucketStyle(bucketStyleDef);    return theBucketStyle; A BucketStyle constructor takes a style definition as input. The style definition specifies the number of buckets (numClasses), a classification scheme (which can be equal-ranged, logarithmic scale, or custom), the styles for each bucket, whether to use a gradient effect, and optionally the buckets (required when using a custom classification scheme). The full source for the demo <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Oracle Maps V2 Thematic Map Demo</title> <script src="http://localhost:8080/mapviewer/jslib/v2/oraclemapsv2.js" type="text/javascript"> </script> <script type="text/javascript"> //var $j = jQuery.noConflict(); var baseURL="http://localhost:8080/mapviewer"; // location of mapviewer OM.gv.proxyEnabled =false; // no mvproxy needed OM.gv.setResourcePath(baseURL+"/jslib/v2/images/"); // location of resources for UI elements like nav panel buttons var map = null; // the client mapviewer object var statesLayer = null, stateCountyLayer = null; // The vector layers for states and counties in a state var layerName="States"; // initial map center and zoom var mapCenterLon = -20000; var mapCenterLat = 1750000; var mapZoom = 2; var mpoint = new OM.geometry.Point(mapCenterLon,mapCenterLat,32775); var currentPalette = null, currentStyle=null; // set an onchange listener for the color palette select list // initialize the map // load and display the states layer $(document).ready( function() { $("#demo-htmlselect").change(function() { var theColorScheme = $(this).val(); useSelectedColorScheme(theColorScheme); }); initMap(); states(); } ); /** * color series from ColorBrewer site (http://colorbrewer2.org/). */ var colorSeries = { //multi-hue color scheme #10 YlBl. "YlBl3": { classes:3, fill: [0xEDF8B1, 0x7FCDBB, 0x2C7FB8], stroke:[0xB5DF9F, 0x72B8A8, 0x2872A6] }, "YlBl5": { classes:5, fill:[0xFFFFCC, 0xA1DAB4, 0x41B6C4, 0x2C7FB8, 0x253494], stroke:[0xE6E6B8, 0x91BCA2, 0x3AA4B0, 0x2872A6, 0x212F85] }, //multi-hue color scheme #11 YlBr. "YlBr3": {classes:3, fill:[0xFFF7BC, 0xFEC44F, 0xD95F0E], stroke:[0xE6DEA9, 0xE5B047, 0xC5360D] }, "YlBr5": {classes:5, fill:[0xFFFFD4, 0xFED98E, 0xFE9929, 0xD95F0E, 0x993404], stroke:[0xE6E6BF, 0xE5C380, 0xE58A25, 0xC35663, 0x8A2F04] }, // single-hue color schemes (blues, greens, greys, oranges, reds, purples) "Purples5": {classes:5, fill:[0xf2f0f7, 0xcbc9e2, 0x9e9ac8, 0x756bb1, 0x54278f], stroke:[0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3] }, "Blues5": {classes:5, fill:[0xEFF3FF, 0xbdd7e7, 0x68aed6, 0x3182bd, 0x18519C], stroke:[0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3] }, "Greens5": {classes:5, fill:[0xedf8e9, 0xbae4b3, 0x74c476, 0x31a354, 0x116d2c], stroke:[0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3] }, "Greys5": {classes:5, fill:[0xf7f7f7, 0xcccccc, 0x969696, 0x636363, 0x454545], stroke:[0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3] }, "Oranges5": {classes:5, fill:[0xfeedde, 0xfdb385, 0xfd8d3c, 0xe6550d, 0xa63603], stroke:[0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3] }, "Reds5": {classes:5, fill:[0xfee5d9, 0xfcae91, 0xfb6a4a, 0xde2d26, 0xa50f15], stroke:[0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3, 0xd3d3d3] } }; function createBucketColorStyle( colorName, colorSeries, rangeName, useGradient) { var theBucketStyle; var bucketStyleDef; var theStyles = []; var theColors = []; var aBucket, aStyle, aColor, aRange; var numClasses ; numClasses = colorSeries[colorName].classes; // create Color Styles for (var i=0; i < numClasses; i++) { theStyles[i] = new OM.style.Color( {fill: colorSeries[colorName].fill[i], stroke:colorSeries[colorName].stroke[i], strokeOpacity: useGradient? 0.25 : 1 }); }; bucketStyleDef = { numClasses : colorSeries[colorName].classes, // classification: 'custom', //since we are supplying all the buckets // buckets: theBuckets, classification: 'logarithmic', // use a logarithmic scale styles: theStyles, gradient: useGradient? 'linear' : 'off' // gradient: useGradient? 'radial' : 'off' }; theBucketStyle = new OM.style.BucketStyle(bucketStyleDef); return theBucketStyle; } function initMap() { //alert("Initialize map view"); // define the map extent and number of zoom levels. // The Universe object is similar to the map tile layer configuration // It defines the map extent, number of zoom levels, and spatial reference system // well-known ones (like web mercator/google/bing or maps.oracle/elocation are predefined // The Universe must be defined when there is no underlying map tile layer. // When there is a map tile layer then that defines the map extent, srid, and zoom levels. var uni= new OM.universe.Universe( { srid : 32775, bounds : new OM.geometry.Rectangle( -3280000, 170000, 2300000, 3200000, 32775), numberOfZoomLevels: 8 }); map = new OM.Map( document.getElementById('map'), { mapviewerURL: baseURL, universe:uni }) ; var navigationPanelBar = new OM.control.NavigationPanelBar(); map.addMapDecoration(navigationPanelBar); } // end initMap function states() { //alert("Load and display states"); layerName = "States"; if(statesLayer) { // states were already visible but the style may have changed // so set the style to the currently selected one var theData = $('#demo-htmlselect').val(); setStyle(theData); } else { // States is a predefined layer in user_sdo_themes var layer2 = new OM.layer.VectorLayer("vLayer2", { def: { type:OM.layer.VectorLayer.TYPE_PREDEFINED, dataSource:"mvdemo", theme:"us_states_bi", url: baseURL, loadOnDemand: false }, boundingTheme:true }); // add drop shadow effect and hover style var shadowFilter = new OM.visualfilter.DropShadow({opacity:0.5, color:"#000000", offset:6, radius:10}); var hoverStyle = new OM.style.Color( {stroke:"#838383", strokeThickness:2}); layer2.setHoverStyle(hoverStyle); layer2.setHoverVisualFilter(shadowFilter); layer2.enableFeatureHover(true); layer2.enableFeatureSelection(false); layer2.setLabelsVisible(true); // override predefined rendering style with programmatic one var theRenderingStyle = createBucketColorStyle('YlBr5', colorSeries, 'States5', true); // specify which attribute is used in determining the bucket (i.e. color) to use for the state // It can be an array because the style could be a chart type (pie/bar) // which requires multiple attribute columns // Use the STATE.TOTPOP column (aka attribute) value here layer2.setRenderingStyle(theRenderingStyle, ["TOTPOP"]); currentPalette = "YlBr5"; var stLayerIdx = map.addLayer(layer2); //alert('State Layer Idx = ' + stLayerIdx); map.setMapCenter(mpoint); map.setMapZoomLevel(mapZoom) ; // display the map map.init() ; statesLayer=layer2; // add rt-click event listener to show counties for the state layer2.addListener(OM.event.MouseEvent.MOUSE_RIGHT_CLICK,stateRtClick); } // end if } // end states function setStyle(styleName) { // alert("Selected Style = " + styleName); // there may be a counties layer also displayed. // that wll have different bucket ranges so create // one style for states and one for counties var newRenderingStyle = null; if (layerName === "States") { if(/3/.test(styleName)) { newRenderingStyle = createBucketColorStyle(styleName, colorSeries, 'States3', false); currentStyle = createBucketColorStyle(styleName, colorSeries, 'Counties3', false); } else { newRenderingStyle = createBucketColorStyle(styleName, colorSeries, 'States5', false); currentStyle = createBucketColorStyle(styleName, colorSeries, 'Counties5', false); } statesLayer.setRenderingStyle(newRenderingStyle, ["TOTPOP"]); if (stateCountyLayer) stateCountyLayer.setRenderingStyle(currentStyle, ["TOTPOP"]); } } // end setStyle function stateRtClick(evt){ var foi = evt.feature; //alert('Rt-Click on State: ' + foi.attributes['_label_'] + // ' with pop ' + foi.attributes['TOTPOP']); // display another layer with counties info // layer may change on each rt-click so create and add each time. var countyByState = null ; // the _label_ attribute of a feature in this case is the state abbreviation // we will use that to query and get the counties for a state var sqlText = "select totpop,geom32775 from counties_32775_moved where state_abrv="+ "'"+foi.getAttributeValue('_label_')+"'"; // alert(sqlText); if (currentStyle === null) currentStyle = createBucketColorStyle('YlBr5', colorSeries, 'Counties5', false); /* try a simple style instead new OM.style.ColorStyle( { stroke: "#B8F4FF", fill: "#18E5F4", fillOpacity:0 } ); */ // remove existing layer if any if(stateCountyLayer) map.removeLayer(stateCountyLayer); countyByState = new OM.layer.VectorLayer("stCountyLayer", {def:{type:OM.layer.VectorLayer.TYPE_JDBC, dataSource:"mvdemo", sql:sqlText, url:baseURL}}); // url:baseURL}, // renderingStyle:currentStyle}); countyByState.setVisible(true); // specify which attribute is used in determining the bucket (i.e. color) to use for the state countyByState.setRenderingStyle(currentStyle, ["TOTPOP"]); var ctLayerIdx = map.addLayer(countyByState); // alert('County Layer Idx = ' + ctLayerIdx); //map.addLayer(countyByState); stateCountyLayer = countyByState; } // end stateRtClick function useSelectedColorScheme(theColorScheme) { if(map) { // code to update renderStyle goes here //alert('will try to change render style'); setStyle(theColorScheme); } else { // do nothing } } </script> </head> <body bgcolor="#b4c5cc" style="height:100%;font-family:Arial,Helvetica,Verdana"> <h3 align="center">State population thematic map </h3> <div id="demo" style="position:absolute; left:68%; top:44px; width:28%; height:100%"> <HR/> <p/> Choose Color Scheme: <select id="demo-htmlselect"> <option value="YlBl3"> YellowBlue3</option> <option value="YlBr3"> YellowBrown3</option> <option value="YlBl5"> YellowBlue5</option> <option value="YlBr5" selected="selected"> YellowBrown5</option> <option value="Blues5"> Blues</option> <option value="Greens5"> Greens</option> <option value="Greys5"> Greys</option> <option value="Oranges5"> Oranges</option> <option value="Purples5"> Purples</option> <option value="Reds5"> Reds</option> </select> <p/> </div> <div id="map" style="position:absolute; left:10px; top:50px; width:65%; height:75%; background-color:#778f99"></div> <div style="position:absolute;top:85%; left:10px;width:98%" class="noprint"> <HR/> <p> Note: This demo uses HTML5 Canvas and requires IE9+, Firefox 10+, or Chrome. No map will show up in IE8 or earlier. </p> </div> </body> </html>

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  • Style, set to Qt application, vanishes, when QDockWindow or QToolBar is being unattached.

    - by Max
    Style, set to Qt application, vanishes, when QDockWindow or QToolBar is being unattached. Application is designed to work in Windows XP environment, most of users use it's 'classic' scheme, and application's style is Cleanlooks. It looks fine, until one want to undock dockable window or move toolbar. CLeanlooks vanishes, and it is rather ugly. Is there any workaround to handle this?

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  • Warehouse Management per Endeca: disponibili i video su Youtube

    - by Claudia Caramelli-Oracle
    12.00 Il team di gestione del prodotto WMS ha registrato quattro video sulle estensioni Warehouse Management per Endeca – il programma che gestisce in tempo reale le operazioni di magazzino. Quasi un'ora di contenuti che copre: Introduzione alle estensioni WMS per Endeca Plan and Track Fulfillment Space Utilization Labor Utilization Tutti e quattro i video possono essere trovati cliccando qui. v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} 12.00 Normal 0 14 false false false IT X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} 12.00 Normal 0 14 false false false IT X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} 12.00 Normal 0 14 false false false IT X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";} Normal 0 14 false false false IT X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:"Calibri","sans-serif"; mso-bidi-font-family:"Times New Roman";}

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  • How do I track down the source of a KVC exception: this class is not key value coding-compliant for

    - by sam
    I get this error when I try to run my app: 2010-04-29 13:49:01.355 MyApp[56123:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<MyViewController 0x5112b10> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key toolbar.' MyViewController used to have an IBOutlet called 'toolbar' that connected to a UIToolbar object in a nib. I decided I no longer needed the toolbar or the nib so I removed them from the project. But Xcode seems to still want to refer to 'toolbar'. Where might the reference to toolbar be if I no longer use a nib? I can synthesize a dummy 'toolbar' property to appease Xcode, but I want to avoid this kind of ugly hack.

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  • Any great books of algorithm puzzles to practice whiteboard coding with?

    - by jboxer
    I'm looking to get some practice coding solutions to algorithm puzzles on a whiteboard. A friend is going to read puzzles to me (as if he were interviewing me), and I'll solve them on a whiteboard. Does anyone know any great books with algorithm puzzles that would be useful for this? I found a book called Puzzles for Programmers and Pros, but it only has six reviews on Amazon, so I'm not sure how good it really is. If anyone has any recommendations, I'd really appreciate it. Thanks a bunch.

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  • Coding exercise for Linux Systems Admin?

    - by Prashanth Sundaram
    Hello All, I am preparing for a Systems Admin(linux) role for a big company(top 10 companies) and one of the requisite is knowledge of a language like perl, python or Ruby. I have a phone interview which involves sharing a editor with the interviewer, now what kind of coding exercise can I expect on a phone interview or a regular interview? I have used shell for most of my day-to-day tasks and occasionally Perl and python for bigger tasks. Now I don't expect them to ask Write a script that sync's AD users to LDAP? I don't think data structures, algorithms or sorting questions apply to me role? Can you give me any examples of SysAdmin related coding questions?

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  • X-ming, Ubuntu apps - getting the Ubuntu style/theme to load

    - by user5402
    I am running X-ming on Windows 7 and using putty to ssh into an Ubuntu system. On the Ubuntu system I use the command: $ gnome-terminal & to display a terminal back on the Windows box. When I do this I don't get the standard Ubuntu style, i.e. dark purple background, Mono font, solid cursor (which I've configured in the Gnome Control Center.) Instead I get a very plain style - white background, blinking cursor, very small font. However, if I run gnome-control-center and then click on, say, the Keyboard icon, the terminal window will be reconfigured with the Ubuntu style with my customizations (e.g. block cursor vs. blinking cursor.) Just starting one of the control applets seems to trigger this style change. My question is: How can I trigger this style change more directly - without having to launch the Gnome Control center and launching one of the configuration applets?

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  • Word 2010 Style Sets and Multilevel Lists

    - by Stevia
    In Word 2010, how can you create quick style sets that include multilevel lists (include being the operative word)? As background, I have created a set of styles for a long agreement form and assigned them to levels in a certain custom multilevel list. I then also saved those styles as a quick style set called Long Agreement. I have saved those styles in my normal template. That all works fine for assigning styles to a Long Agreement. What I'd like to do next is create a second style set called Short Agreement. I will assign certain styles to that style set. The issue is that I don't see how to tie a different custom multilevel list to those Short Agreement styles. When I click on Change Styles, Short Agreement [style set], and I apply those styles, how can I get it to automatically use the multilevel list that I assign to short agreements?

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  • Word 2010 Style Sets and Multilevel Lists

    - by Stevia
    In Word 2010, how can you create quick style sets that include multilevel lists (include being the operative word)? As background, I have created a set of styles for a long agreement form and assigned them to levels in a certain custom multilevel list. I then also saved those styles as a quick style set called Long Agreement. I have saved those styles in my normal template. That all works fine for assigning styles to a Long Agreement. What I'd like to do next is create a second style set called Short Agreement. I will assign certain styles to that style set. The issue is that I don't see how to tie a different custom multilevel list to those Short Agreement styles. When I click on Change Styles, Short Agreement [style set], and I apply those styles, how can I get it to automatically use the multilevel list that I assign to short agreements?

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  • The Legend of Zelda – 1980s High School Style [Video]

    - by Asian Angel
    What happens when you mix the Legend of Zelda with the 80s high school scene? Something fun and cheesy that makes you wish there really was a movie based on this! From YouTube: In this charming critically-acclaimed tale of first love, Link, an eternal optimist and adventurer, seeks to capture the heart of Zelda, an unattainable high school beauty and straight-A student. He surprises just about everyone-including himself-when she returns the sentiment. But the high school’s over-possessive, megalomaniacal Principal Ganondorf doesn’t approve and it’s going to take more than just the power of love to conquer all. The Legend of Zelda (1987) Trailer [via Geeks are Sexy] Latest Features How-To Geek ETC How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The Legend of Zelda – 1980s High School Style [Video] Suspended Sentence is a Free Cross-Platform Point and Click Game Build a Batman-Style Hidden Bust Switch Make Your Clock Creates a Custom Clock for your Android Homescreen Download the Anime Angels Theme for Windows 7 CyanogenMod Updates; Rolls out Android 2.3 to the Less Fortunate

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  • iOS 5: Enable Android Style Auto Correction Feature With A Simple Trick

    - by Gopinath
    Apple generally don’t let its users to play with their devices, but seems to be these days there are few things slipping through the nets. Smart users are able find some hacks and enable new features on iOS devices! Few days ago we heard about the hidden panorama feature built into iOS 5 and it could be enabled on a jail broken device. Here come another hidden feature unearthed by a smart geek in iOS 5 : enable Android style auto-correction on on-screen keyboard. Luckily to enable this feature you don’t need to jailbreak, all you need to do is to take backup of your device, edit a file and restore it back. Boom!  That’s it. To enable auto corrections feature on the on-screen keyboard of iOS 5 follow these steps Download iBackupBot and install it on your machine. It’s works on both Windows and Mac OS X. Backup your iPhone, iPod, or iPad with iTunes – plug in your iOS device and sync it. Open iBackupBot, locate your most recent backup and click on it Scroll down to Library/Preferences/com.apple.keyboard.plist and double-click on it.   Replace everything between the two <dict> with the following <key>KeyboardAutocorrectionLists</key> <string>YES</string> Save the plist file, then hit the "Restore From Backup" button in iBackupbot. Reboot your device to see the auto correction feature in action on your device’s on-screen keyboard. via lifehacker This article titled,iOS 5: Enable Android Style Auto Correction Feature With A Simple Trick, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • ALMing in Hinglish 2&ndash;Windows 8-Manual Testing Metro Style Apps using MTM11

    - by Tarun Arora
    What is ALMing in Hinglish => Introduction     ????? ?????? ??? ?????? ????, ?????? ??????? ?? ?????? ?????? ?? ????? ?????? ?????? 8 ?????? ?????? ??????????? ?? ?????? ???????? ?? ???? ???. ??? ???? ???????????? ????? ??????? 2011 ?? ?????? ?? ?? ???? ????? ?????? 8 ?????? ?????? ??????????? ?? ?????? ???????? ??. ALMing in Hinglish–Windows 8 Metro Style App manual testing using MTM11   In this second in the series of videos I bring to you Shubhra Maji who is a Program Manager on the Visual Studio dev tools team in Hyderabad along with the very seasoned Aditya Agarwal & Srishti Sridhar who have been working in the Visual Studio team from past several releases. The team wonderfully walks us through manually testing Metro Style Apps in Windows 8 using Microsoft Test Manager 2011. A great thank you for watching, if you have any questions/feedback/suggestions please contact us. Stay Tuned for more… Namaste!   You might also like - ALMing in Hinglish 1-Exploratory Testing in VS11 with Nivedita Bawa

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  • Designing rules to fight smallpox in Civ-style TBS games

    - by Williham Totland
    TL;DR: How do you design a ruleset for a Civ-style TBS game that prevents city smallpox from being a profitable or viable strategy? Long version: Civ-style games are pretty great. Bringing a civilization from cradle to grave is a great endeavor, and practicing diplomacy with hard-line human players is fun and challenging. In theory. In practice, however, many of these games has, especially in multiplayer, exactly one viable strategy: City smallpox, a.k.a. infinite city spread, a.k.a. covering all available space with 1-citizen cities, packed as tight as they will go. I suppose this could count as emergent gameplay, but still; it could hardly be considered to be in the spirit of the class of game. The Civilization series, of course, is stuck in their more or less fixed rule sets, established with Civilization. Yes, there have been major changes in some respects, but the rules pertaining to city building and maintenance have stayed pretty similar. So the question, then: If you build a ruleset for a TBS from the ground up; what rules should be in place to prevent Infinite City Sprawl from being a viable strategy? Or should ICS be a viable strategy?

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  • Go/Obj-C style interfaces with ability to extend compiled objects after initial release

    - by Skrylar
    I have a conceptual model for an object system which involves combining Go/Obj-C interfaces/protocols with being able to add virtual methods from any unit, not just the one which defines a class. The idea of this is to allow Ruby-ish open classes so you can take a minimalist approach to library development, and attach on small pieces of functionality as is actually needed by the whole program. Implementation of this involves a table of methods marked virtual in an RTTI table, which system functions are allowed to add to during module initialization. Upon typecasting an object to an interface, a Go-style lookup is done to create a vtable for that particular mapping and pass it off so you can have comparable performance to C/C++. In this case, methods may be added /afterwards/ which were not previously known and these new methods allow newer interfaces to be satisfied; while I like this idea because it seems like it would be very flexible (disregarding the potential for spaghetti code, which can happen with just about any model you use regardless). By wrapping the system calls for binding methods up in a set of clean C-compatible calls, one would also be able to integrate code with shared libraries and retain a decent amount of performance (Go does not do shared linking, and Objective-C does a dynamic lookup on each call.) Is there a valid use-case for this model that would make it worth the extra background plumbing? As much as this Dylan-style extensibility would be nice to have access to, I can't quite bring myself to a use case that would justify the overhead other than "it could make some kinds of code more extensible in future scenarios."

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  • Different Style Technique

    - by Muhammad Iqbal Dwi Cahyo
    I'm newbie here.. Please anyone knows, to create a character that his/her Style Tech is had a different kind of movement... I wanna make my character 2d his/her power technique like rasengan, I mean first the ball its just spining around and then going bigger and much more bigger so blow up if it touch his/her opponent? How the coding is, and what I've must do? Please your guide, thank's a lot... ^_^

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  • Coding Competition, language agnostic guidelines?

    - by Miau
    Hi there: I might be doing a coding competition soon, I was wondering if anyone made one and what where the guidelines/ process. I'd like to make the competition appealing to all devs, and I m trying to come up with ideas as to how. the scenario is: There is an event running and we(of the coding competition) will have a room that we can use (either to code or for questions, etc), however, ideally the task for the competition should be assignet and they should eb able to go and do other things, if they are so inclined. what i wonder is what kind of challenges to give, and most importantly, what is the criteria to "win" teaching and learning good coding standards takes a looong time, and I d like to think that if you ve been coding for longer you ll do things right and quick... but in a competition, you would be cutting corners... I would really appreciate your input on this

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  • Finding Freelance/Contract Coding Projects

    - by Laplie
    What's the best way to find freelance/contract coding projects? I'm looking for paid freelance coding jobs. Almost all of the websites that I've come across are filled with foreigners willing to work at 1/4th the pay, job posters wanting you to recode Microsoft Office for $50, or grey-area coding projects (link generators, bots, trojans). Is there any way to find decent freelance work?

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  • Can't override a global WPF style that is set by TargetType on a single specific control

    - by Matt H.
    I have a style applied to all my textboxes, defined in a resource dictionary.. <Style TargetType="TextBlock"> <Setter Property="TextBlock.FontSize" Value="{Binding Source={StaticResource ApplicationUserSettings}, Path=fontSize, Mode=OneWay}" /> <Setter Property="TextBlock.TextWrapping" Value="Wrap" /> <Setter Property="TextBlock.VerticalAlignment" Value="Center"/> <Setter Property="Background" Value="Transparent"/> <Setter Property="TextBox.FontFamily" Value="{Binding Source={StaticResource ApplicationUserSettings}, Path=fontName, Mode=OneWay}"/> </Style>\ The fontsize and fontstyle properties are bound to a special user settings class that implements iNotifyPropertyChanged, which allows changes to font size and fontfamily to immediately propogate throughout my application. However, in a UserControl I've created (Ironically, the screen that allows the user to customize their font settings), I want the font size and fontfamily to remain static. No matter what I try, my global font settings override what I set in my user control: <UserControl x:Class="ctlUserSettings" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:R2D2" Height="400" Width="600"> <Grid> <Grid.Resources> <Style x:Key="tbxStyle" TargetType="TextBox"> <Style.Setters> <Setter Property="FontSize" Value="14"/> <Setter Property="FontFamily" Value="Tahoma"/> </Style.Setters> </Style> ... etc... <StackPanel Margin="139,122.943,41,0" Orientation="Horizontal" Height="33" VerticalAlignment="Top"> <TextBox Style="{x:Null}" FontSize="13" FontFamily="Tahoma" HorizontalAlignment="Left" MaxWidth="500" MinWidth="350" Name="txtReaderPath" Height="Auto" VerticalAlignment="Top" /> <TextBox Style="{x:tbxStyle}" Margin="15,0,0,0" HorizontalAlignment="Left" Name="txtPath" Width="43" Height="23" VerticalAlignment="Top">(some text)</Button> </StackPanel> I've tried setting Style to {x:Null}, setting custom font sizes inline, and setting a style in the resources of this control. None take precedence over the styles in my resource dictionary. As you can see, I show a sprinkling of all the things I've tried in the XAML sample above... What am I missing?

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  • Which coding system should I use in Emacs?

    - by Vivi
    I am a newbie in Emacs, and I am not a programmer. I have just tried to save a simple *.rtf file with some websites and tips on how to use emacs and I got These default coding systems were tried to encode text in the buffer `notes.rtf': (iso-latin-1-dos (315 . 8216) (338 . 8217) (1514 . 8220) (1525 . 8221)) However, each of them encountered characters it couldn't encode: iso-latin-1-dos cannot encode these: ‘ ’ “ ” .... etc, etc, etc Now what is that? Now it is asking me to chose an encoding system Select coding system (default chinese-iso-8bit): I don't even know what an encoding system is, and I would rather not have to choose one every time I try and save a document... Is there any way I can set an encoding system that will work with all my files so I don't have to worry about this? I saw another question and asnswer elsewhere in this website (see it here) and it seems that if I type the following (defun set-coding-system () (setq buffer-file-coding-system 'utf-8-unix)) (add-hook 'find-file-hook 'set-coding-system) then I can have Emacs do this, but I am not sure... Can someone confirm this to me? Thanks so much :)

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  • WPF - ListBox ignores Style When ItemsSource is bound

    - by Andy T
    Hi, I have created styled a ListBox in WPF so that it is rendered as a checkbox list. When I populate the ListBox's items manually, the styling works perfectly. However, when I instead bind the ItemsSource of the ListBox to a static resource (an ItemsControl containing the required items), the styling is completely dropped. Here's the style: <Style x:Key="CheckBoxListStyle" TargetType="ListBox"> <Style.Resources> <Style TargetType="ListBoxItem"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ListBoxItem"> <Grid Margin="2"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition /> </Grid.ColumnDefinitions> <CheckBox IsChecked="{Binding IsSelected, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"/> <ContentPresenter Grid.Column="1" Margin="2,0,0,0" /> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </Style.Resources> <Setter Property="ItemsPanel"> <Setter.Value> <ItemsPanelTemplate> <WrapPanel Orientation="Vertical" /> </ItemsPanelTemplate> </Setter.Value> </Setter> <Setter Property="BorderThickness" Value="0" /> <Setter Property="Background" Value="Transparent" /> </Style> Here's the code for the ListBox that shows the style correctly: <ListBox x:Name="ColumnsList" Grid.Column="0" Grid.Row="0" Style="{StaticResource CheckBoxListStyle}" BorderThickness="1"> <ListBox.Items> <ListBoxItem>Test</ListBoxItem> <ListBoxItem>Test2</ListBoxItem> <ListBoxItem>Test3</ListBoxItem> </ListBox.Items> </ListBox> Here's the code for the ListBox that ignores the style: <ListBox x:Name="ColumnsList2" Grid.Column="0" Grid.Row="0" Style="{StaticResource CheckBoxListStyle}" BorderThickness="1" ItemsSource="{Binding Source={StaticResource Test1}, Path=Items}"> </ListBox> Hoping someone can help - I'm pretty new to all this and have tried everything I can think of, but everything I've read leads me to believe that setting ItemsSource should have the same outcome as setting the items manually, so I can't see any reason why this would not work. Thanks, AT

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