painting pixels, lines and circles directly on a image.
lazarus / 39-Graphics

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dcelso · 2013-03-08 19:37

Hello, I would like do a mini mspaint like application.
I have a main menu to open and close a image.
I have a toppanel to create a palettepanel
I have a statusbar to put information
I have a tpicture on alclient to show the image.
I have a tool to paint pixel by pixel.

But now I need several tools more.
I would like start to painting a line. I like that the application do
the next.
when i select "line tool" the first point that i select with the mouse
will be the first point of my line, this is easy, but now i want paint
a line between the selected point and the mouse current point until
you press the mouse button again. And this is that i dont know how to
do.
Anybody know how do it?
Thanks.

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dcelso · 2013-03-09 22:08

I did it using lazcanvas. I create a tbitmap convert it on
lazintfimage and with this i create lazcanvas. After this i use
line,ellipse,polygon,rectangle methods.

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User137 · 2013-03-10 06:16

To draw something temporary on top of actual image, you can propably
use something like TPaintBox (i have no experience with), or
TImage.Canvas.