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  • Trouble with OpenLayers Styles.

    - by Jenny
    So, tired of always seeing the bright orange default regular polygons, I'm trying to learn to style OpenLayers. I've had some success with: var layer_style = OpenLayers.Util.extend({},OpenLayers.Feature.Vector.style['default']); layer_style.fillColor = "#000000"; layer_style.strokeColor = "#000000"; polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer"); polygonLayer.style = layer_style; But sine I am drawing my polygons with DrawFeature, my style only takes effect once I've finished drawing, and seeing it snap from bright orange to grey is sort of disconcerting. So, I learned about temporary styles, and tried: var layer_style = new OpenLayers.Style({"default": {fillColor: "#000000"}, "temporary": {fillColor: "#000000"}}) polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer"); polygonLayer.style = layer_style; This got me a still orange square--until I stopped drawing, when it snapped into completely opaque black. I figured maybe I had to explicitly set the fillOpacity...no dice. Even when I changed both fill colors to be pink and blue, respectively, I still saw only orange and opaque black. I've tried messing with StyleMaps, since I read that if you only add one style to a style map, it uses the default one for everything, including the temporary style. var layer_style = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']); var style_map = new OpenLayers.StyleMap(layer_style); polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer"); polygonLayer.style = style_map; That got me the black opaque square, too. (Even though that layer style works when not given to a map). Passing the map to the layer itself like so: polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer", style_map); Didn't get me anything at all. Orange all the way, even after drawn. polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer", {styleMap: style_map}); Is a lot more succesful: Orange while drawing, translucent black with black outline when drawn. Just like when I didn't use a map. Problem is, still no temporary... So, I tried initializing my map this way: var style_map = new OpenLayers.StyleMap({"default": layer_style, "temporary": layer_style}); No opaque square, but no dice for the temporary, either... Still orange snapping to black transparent. Even if I make a new Style (layer_style2), and set temporary to that, still no luck. And no luck with setting "select" style, either. What am I doing wrong? Temporary IS for styling things that are currently being sketched, correct? Is there some other way specific to the drawFeature Controller? Edit: setting extendDefault to be true doesn't seem to help, either... var style_map = new OpenLayers.StyleMap({"default": layer_style, "temporary": layer_style}, {"extendDefault": "true"});

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  • Uncaught Error: INDEX_SIZE_ERR

    - by Gart
    I am drawing on a canvas with the following line: ctx.drawImage(compositeImage, 0, 0, image.width, image.height, i, j, scaledCompositeImageWidth, scaledCompositeImageHeight); This code has executed error free on Safari, Chrome, Firefox (and even IE using google's excanvas library). However, a recent update to Chrome now throws the following error: Uncaught Error: INDEX_SIZE_ERR: DOM Exception 1 This code often positions part or all of the drawn image OFF the canvas, anyone got any idea what's going on here?

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  • Screenshot from WPF application as SVG / vector graphic?

    - by stefan.at.wpf
    Hello, is it possible to create a screenshot of a WPF application as SVG / is there some WPF built-in function to get the XAML code for the current drawn window that then can be converted to SVG? I need some screenshots for documenting a WPF application and I'd like them to be zoomable like a WPF program is using e.g. Snoop or Vista Magnifyer. Thanks for any hint!

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  • Labeling Y axis with PChart

    - by Sortea2
    I am using PChart for PHP to draw graphs, it is working pretty well. I have drawn a graph with intensities (2 = strong, 1 = medium, 0 = low) and I would like to know if is possible to show on the Y axis the description of the data (strong,medium,low) instead of the inappropriate numbers (2,1,0). (I have search a lot without success, theoretically you can only set the X labels according to http://pchart.sourceforge.net/documentation.php?topic=faq.xlabels.) Thanks!

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  • wpf and win32 overlapping issue

    - by priya-hatipkar
    I have a wpf Window, which has wpf control and windows forms control hosted in WindowsFormsHost. The expected behavior is that the WPF control should be rendered on top of WindowsFormsHost. Unfortunately, this is a limitation in the interop story, WindowsFormsHost elements are always drawn on top, and don't get affected by z-order. http://msdn.microsoft.com/en-us/library/ms742522.aspx Is there any workaround to solve this problem? Regards, Priya

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  • Adding Emboss to a UILabel in a navigationItem.titleView (as seen with navigationItem.title)

    - by Sahil
    I'm trying to mimic the default emboss that automatically gets applied to navigationItem.title, as well as many other UIKit controls. As seen in this screenshot's title ("Table Cells"): I'm essentially trying to add 2 UILabels to the navigationItem.titleView, however the UILabels just show up as flatly drawn and it really just doesn't feel/look right :P I've thought about playing with shadows, but that would only give the embossed look (if even that) on one side of the label. Any ideas would be great! Thanks

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  • Any simple shape recognition libraries for Java?

    - by Phil
    I am working on a on-screen keyboard for Android, and I need to recognize starting points, turning points and end points of lines drawn by the user on the keyboard. A simple straightening function would be nice, as it is difficult to draw a perfectly straight line even with a stylus, not to mention finger-only touchscreens today. What I am trying to write is something like Swype. Any good libraries that I can use or make reference to?

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  • View controller is drawing under my navigation bar after popping ttthumbsviewcontroller

    - by scootklein
    I'm implementing the TTThumbsViewController from the Three20 project and things are finally starting to take shape. I push the TTThumbsViewController from the current view controller by just pushing it onto the current stack and animate the transition (common navigation controller push). My problem is that when I pop the TThumbsViewController view controller, the navigation controller is stuck in a mode where its view controllers are drawn UNDER the navigation bar (which is now translucent). Start Push Pop

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  • JQuery Resize div

    - by msj121
    I want to add a div on a click and automatically start the resize mouse ui functionality with the mousedown. I can add the div easily, I have the resize functionality easy. But I can't figure out how to pass the mouse event and bind them so that the resize can start right away. Imagine a painting like program so the div can be added and drawn by dragging the mouse...? Thank you so much.

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  • Javascript Uncaught Error: INDEX_SIZE_ERR: - Google Chrome - Canvas

    - by Gart
    I am drawing on a canvas with the following line: ctx.drawImage(compositeImage, 0, 0, image.width, image.height, i, j, scaledCompositeImageWidth, scaledCompositeImageHeight); This code has executed error free on Safari, Chrome, Firefox (and even IE using google's excanvas library). However, a recent update to Chrome now throws the following error: Uncaught Error: INDEX_SIZE_ERR: DOM Exception 1 This code often positions part or all of the drawn image OFF the canvas, anyone got any idea what's going on here?

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  • Drawing an image on view over scrollview

    - by Deepika
    Hi, I have a scrollview on a controller. To enable paging for scrollview, i have added another controller, which initializes when the pages are made. That means for each page i have a controller made at run time. In the view of scroll controller, i am trying to draw an image using drawRect. The problem is i see the drawn image only for the 1st page and when i scroll, the other controllers are blank. Please help

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  • How to draw onto a PictureBox image when control resizes?

    - by Sam Mackrill
    I am using the pictureBox_Paint event to try and draw an overlay onto the image in a PictureBox. This is working fine until I resize the PictureBox (set to use SizeMode.Zoom), when I do this the overlay graphic is drawn off position by the margin between the image and the edge of the PictureBox. I guess I need to use the ImageRectangle somehow but this is not public.

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  • efficient algorithm for drawing circle arcs?

    - by banister
    I am using the mid-point circle algorithm (bresenham circle) to efficiently draw whole circles. Is there something similar to draw circle arcs? I would like to specify a start angle and end angle and have only that portion of the circle drawn. Thanks in advance! EDIT: I would like to draw filled circle arcs too, i.e pie-slices. :)

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  • How can I fill a rect with an alpha color using CoreGraphics?

    - by Rits Plasman
    In my drawRect method, I am drawing a PNG image. On top of that, I want to draw a rect with a 20% alpha color, like this: [[UIColor colorWithWhite:0.0 alpha:0.2] set]; UIRectFill(rect); The problem is, that the alpha property seems to get ignored. No alpha is applied at all, just a black rectangle is drawn. How can I fix this? Thanks in advance!

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  • plt-scheme : catching mouse click event on canvas

    - by Thura
    I am writing a tic-tac-toe game in plt-scheme as my AI course project. The idea for gui is a grid with 9 boxes, each with a canvas, using panes ... When the user click on a canvas, 'X' or 'O' will be drawn accordingly ... The question is how can I catch mouse click event on canvas? I found out I need to use on-event, but still don't know how? Any clues?

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  • Best Planar graph program

    - by brian
    In graph theory, a planar graph is a graph that can be embedded in the plane, i.e., it can be drawn on the plane in such a way that its edges intersect only at their endpoints. What is the best open source program for drawing the planar graph with support of input nodes size and fixed drawing boundary region

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  • Delete rectangle using c#?

    - by C. Karunarathne
    Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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  • Intersection of Inner Polygons of MKPolygon being colored - iOS

    - by Josh Glick
    I am trying to create a fog of war style map where areas I have visited are uncovered and the rest of the map is "hidden". I am using a MKPolygonOverlay that covers the whole map and create inner polygons around all the locations I have visited. However in areas where these inner polygons overlap, that portion of the overlay is still being drawn. As a new user I can't post pictures but here is a link to the image: http://dl.dropbox.com/u/13815916/Screen%20Shot%202012-06-29%20at%204.40.20%20AM.png

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  • As3: Plotting text as in technical drawings

    - by Cambiata
    Hi! Flash/Actionscript 3 lack the possibility to "draw" text to a displayobject graphics - a textfield has to be created, added and set. This is rather clumsy and time consuming. In the wait for simple and stable alternatives (for example http://lab.polygonal.de/2009/12/15/font-rendering-with-the-fp10-drawing-api/), is there a class or library for simply plotting text strings using graphical primitives (lines), something like the text is "drawn" on plotted technical drawings?

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  • Should you use a PHP Framework?

    - by christopher-mccann
    I have asked before about selecting a framework but I have never actually asked should you a framework? In the past I have never used one but I am being drawn more and more to the idea to speed up development time. I am really concerned about the performance of the application though. Does anyone have any views on whether it is a good idea or not to use a framework? The performance of the apps built on top of it will be crucial. Thanks

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  • Hooks in ghostscript

    - by anon
    Anyone know the right places to hook into ghostscript, so that when interpreting a ps file, I can get logs of all calls of the form: draw_character(float x, float y, string font_name, int char_id); ? Basically I want to take a postscript file, and get a list of where all characters are drawn to the screen. Thanks!

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  • Delete rectangle using .NET?

    - by C. Karunarathne
    Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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