Clipping Regions Example

Listing 6.14 uses Xor to clip regions.

Listing 6.14 Using the Xor method

Pen pen = new Pen(Color.Red, 5);
SolidBrush brush = new SolidBrush(Color.Red);
Rectangle rect1 = new Rectangle(50, 0, 50, 150);
Rectangle rect2 = new Rectangle(0, 50, 150, 50);
Region region = new Region(rect1);
region.Xor(rect2);
g.FillRegion(brush, region);

Figure 6.14 shows the output from Listing 6.14.

Figure 6.14. Result of the Xor method

Now if we replace Xor with Union:

region.Union(rect2);

the new output looks like Figure 6.15.

Figure 6.15. Result of the Union method

Now let's replace Union with Exclude:

region.Exclude(rect2);

The output looks like Figure 6.16.

Figure 6.16. Result of the Exclude method

If we use the Intersect method:

region.Intersect(rect2);

the output looks like Figure 6.17.

Figure 6.17. Result of the Intersect method