want to get color value from a Gradient color bar

Question

generate a rectangle with LinearGradientBrush(rectColor.RedColor.GrayLinearGradientMode.Horizontal). i want to get any point color value in the rectangle  how can i do?

tang_eric · Answer

hiMykonian! thx a lot!

Mykonine · Answer

Seeing as it's a linear gradient you can calculate the value of the color through some basic mathematical formulas. Something like this (I'm gonna fill in some code here): these four are fields (at the class scope): int rectLeft rectRight; Color leftColor rightColor; /*I use the MouseUp event only because it's the last color the user chooses. You could also use the MouseMove event so that the color stays updated.*/ public void Form_MouseUp(object sender System.MouseEventArgs e) { //make sure the mouse click is in the rectangle if(e.Y > this.gradientRectangle.Y + this.gradientRectangle.Height || e.Y = 0 && amountChange