How to realize polygon custom control

lilydiao01

For example, how to realize the control of triangle and trapezoid shape, the control is inherited from the pictureBox or label control.

zxccxz1

In fact, use pictures for screen performance, just calculate the corresponding position of the mouse reasonably

maodanyun

A simpler implementation method:
When you draw the control, you can draw a polygon, and then fill the polygon with a color different from the background color. In fact, the drawn space is still rectangular, but the background color is different from the polygon fill color.

maodanyun

However, it is better to inherit the Control class directly.

lilydiao01

I am now like this: there is a background picture on the form, and a picture is drawn on a Label (occupying the entire Label), but I want to display a small area in the upper right corner as transparent so that it can see the background picture.

lygzgs

Create a Region you want, and then assign the label's region attribute

lilydiao01

Good way upstairs, try it

jiangjiale

Override the OnPaint event of the control to draw the Region of the graphics you want