I'm attempting to learn Tkinter with the goal of being able to create a 'real-time' scope to plot data. As a test, I'm trying to draw a polygon on the canvas every time the 'draw' button is pressed. The triangle position is randomized. I have two problems: There is a triangle on the canvas as soon as the program starts, why and how do ...
Hi, I am trying to create a canvas with scroll bars. Can anyone help me give some ideas on how to do this? I have already tried using grid of 1 row and 1 column but due to certain constraints I want to use canvas. Thanks in advance! ...
I am trying to draw a line on cartesiandatacanvas. While I am able to draw lines easily using the canvas.moveTo and canvas.lineTo methods, I cannot provide a tooltip to the line if I use that functionality. I have tried creating a label(when ever I draw a line) and adding a tooltip to it but since I show the lines in a 10*10 grid both ve...
Hi, I have a canvas with a background set to be lineargradientbrush....how do I then extract the color from this background at a particular mouse point (x,y)? I can do this with a BitmappedImage fine...as this deals with pixels, not sure about a canvas though... Thanks greatly in advance, U. ...
I'm trying to implement the sliding nav as described in this simple tutorial: http://sixrevisions.com/tutorials/javascript_tutorial/create-a-slick-and-accessible-slideshow-using-jquery/ But rather than using images, I'd like to use charts from this charting package: http://www.highcharts.com/documentation/how-to-use I've found that wh...
I'm coding an app (temporarily up here), and I want to make its parameters modifiable. I feel the best way to do this would be with your standard GUI slider elements (a la this, but not so ugly). I just noticed that the DOM doesn't provide these, however... What's the best way to introduce sliders to a webpage? Is there a standard libr...
I'm trying to curve text this effect using CSS3, HTML Canvas, or even SVG (see image below for example)? Is this possible? If so, how can I achieve this effect? Update: To clarify: The text that will be styled this way will be dynamic. ...
Task: (all in code, not visual) create a canvas, place into it some labels and draw some lines, then cache it as byteArray. The problem is that if I cache an object that is already drawed on the screen, it works great, but if I cache a canvas, that have been created few lines earlier, this results white image. Is there any solution to...
Hi, I want to render some text on a canvas using WebGL, which API of WebGL should be used? Note: "text" can be either plain text or HTML snippet with CSS style ...
I've googled and googled about this, and all I can find, including on StackOverflow, is "support was and is broken in most major browsers." Not an actual solution to my problem. This month's Playboy came with a pair of 3D glasses (red/cyan) to view the eye-popping centerfold. Naturally, I hit the Internets to find every single red/cya...
I don't think the drawWindow() method works on a live website. Is there a way round it? ...
Hello, I have problems drawing some simple lines in a view object (Android programming). First I created the layout with the view element(kind of painting area) in it (XML file). [...] < View android:id="@+id/viewmap" android:layout_width="572px" android:layout_height="359px" android:layout_x="26px" android:layout_y="27px" > [...] ....
I want to capture a webpage as an image. I am able to do this using a firefox extension using context.drawWindow method. Now I want to strech myself and see if I can do this using a bookmarklet :) I remember reading somewhere that context.drawWindow() works only from the firefox toolbars. I dont know if that's still true or not. Can an...
Hi, I created a canvas object in my firefox plugin and now, I want to access the same from a webpage (The feature on the webpage will only work if the plugin is installed and the browser is FF). Now, usually we access DOM elements inside a page through the browser plugin. How can I access it the other way round - i.e access the canvas ...
I have been experimenting HTML5 canvas by coding basic mind-mapping application. I have tried to find out if there is any javascript API used for managing object in canvas like collision detection between images or shapes. I think it is not a good idea to write my own since there might be some good API around. Anyone have clue or some in...
My application is based on client-server architecture . It is a E-Learning Application. I am using ruby on rails server, javascript,canvas,SVG element . I have an idea of an interface to allow the teacher to build any type of animation for students using Cake javascript API . I wanted to save the animation build using the canvas element ...
I am using Raphael to create lines between divisions in an organization chart (or flow chart), but I need to be able to actually click on the divisions and content behind it. If I could make the canvas be behind the other elements, kind of like a background image, that would be idea. Is this possible? ...
Is there any javascript(/jquery) framework/plugin which generates Balloons? The one that can be used in Comics. The balloon dynamically expands and contracts based on the length of the quote. ...
I'm going to develope a Android program, with a photo display on screen. And there are some text and drawing (circle/Rect) over the photo. The text and drawing will change when use touch on the screen. How can I implement? SurfaceView? ItemizedOverlay? or anything else? Pls. advise. Thx all:) ...
After some grueling debugging, I think I have found a bug in the iPad Safari's implementation of canvas.drawImage(). Specifically this overload: void drawImage(in HTMLImageElement image, in float sx, in float sy, in float sw, in float sh, in float dx, in float dy, in float dw, in float dh); When slicing an image and scaling it down, i...