Allias Nicolas wrote: >> what is a "gum"? > > Huh, sorry, I meant a rubber (same word in French)
ahh -- that would be an "eraser" in American English. > I want to change the values of the image's pixels rubbed, so i should take the > whole rubbed pixels or merge the added lines with the bitmap ? > I didn't saw any rubber example on floatcanvas. Any idea ? No, I don't think there is an example of that. However, I'm a bit confused -- FloatCanvas is primarily a vector graphics tool, not a bitmap graphics tool. IN general, the final image is made up of a bunch of DrawObjects that are defined mathematicially, and rendered at a given scale when desired, so you don't' usually manipulate the pixels, but rather the definition of the DrawObjects, and let FloatCanvas manipulate the pixels for you. This can get a bit confused, and one type of DrawObject is a ScaledBitmap, which is made up of pixels. If you want to use your "gum" on a ScaledBitmap (or regular Bitmap), then you need to be manipulating the pixels of that bitmap, rather than FloatCanvas' buffer. Depending on how you put your ScaledBitmap on the canvas, it may be tricky to figure out which pixels you want. >> That's what InForeground is for. > > is it a function or an attribute ? It is an attribute of a DrawObject, and it is set when you put the Object on the Canvas, depending on the value of the InForeground parameter. > The shorter I can: I don't have time right now to look through this, but: > in UpdateScreen I resize all added lines, but I want to resize in function of > the thickness of each lines.. not with the last thickness, is there a > way to get > each line thickness, in order to : > item.SetLineWidth(item.GetlineWidth()*self.parent.Scale) ? It looks like you want the LineWidth to scale with the whole drawing? The behavior of the Default Line object is to stay the same width as you zoom -- this is because to use it to represent data, that is often desirable -- at least it was for my uses! To do this, you want to make a new DrawOBject, probably derived from FloatCanvas.Line, and change its _draw attribute to scale the line thickness. Take a look at ScaledTextBox for an example you can borrow from -- there the font size is scaling, which would be similar to a linewidth scaling. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] _______________________________________________ FloatCanvas mailing list [email protected] http://mail.mithis.com/cgi-bin/mailman/listinfo/floatcanvas
