I'm working on a small canvas drawing program with GWT 2.3 and I'm hitting a problem with IE9. After a user draws a rectangle to the canvas, I want to allow dragging or resizing. To catch the mouse down in the rectangle I'm using a technique similar to the one show in this example: http://simonsarris.com/blog/225-canvas-selecting-resizing-shape
Basically I keep an ArrayList of my rectangles (other shapes will follow). On mouse down, if my state is NONE (no drawing, dragging, etc.) I clear a a hidden canvas and draw each item in my ArrayList to to that canvas with fill style black and test for alpha. If alpha is greater than zeor, I return the object clicked. In Firefox, this works perfectly each time. However in IE I don't get alpha > 0 till the 3rd click. If keep the mouse in a rectangle--NO MOVEMENT--it takes 3 clicks in the same spot, 3 calls to my test method, before alpha > 0. What's the reason for this delay with IE? The example above is pure Javascript,and it works in IE9 (if copy it locally and change the doctype header). What gives with GWT? Is there some problem with GWT's ImageData in IE? Is there some work around? -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-toolkit@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
