namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } public void Chose() { this.BackColor = Color.White; } private void F03_Click(object sender, EventArgs e) { Chose(); } } } I have a lot of buttons and when you click on any one it should change color. preferably through this (it […]

I’m reading list of points from a json file and then draw the points on a file and then display the file with the drawn points. the problem is that if before loading i wad drawing points they will stay when loading. i need to clear the image file before drawing the points form the loading json. i’m not using paint event but Graphics for drawing on the image file.

In Winforms I have 72 buttons with images that are supposed toggle back and forth between different images when clicked, but I can’t find why the first click doesn’t make them toggle, all clicks after the first click seem to work as expected.

the problem is that no matter where and when i capture the screenshot it’s capturing it without the red point or a bit after the point has drawn and then the mouse cursor is no longer at the same position.

private void pictureBoxPoints_MouseDown(object sender, MouseEventArgs e) { if (pictureBoxPoints.Image != null) { pointCoordinates.X = e.X; pointCoordinates.Y = e.Y; // Convert point coordinates from pictureBoxPoints to original frame coordinates double xFactor = (double)pictureBoxPoints.Image.Width / pictureBoxPoints.Width; double yFactor = (double)pictureBoxPoints.Image.Height / pictureBoxPoints.Height; double xOffset = _convertedRectangle.X; double yOffset = _convertedRectangle.Y; int imageX = (int)(pointCoordinates.X * xFactor) + […]

private void pictureBoxPoints_MouseDown(object sender, MouseEventArgs e) { if (pictureBoxPoints.Image != null) { pointCoordinates.X = e.X; pointCoordinates.Y = e.Y; // Convert point coordinates from pictureBoxPoints to original frame coordinates double xFactor = (double)pictureBoxPoints.Image.Width / pictureBoxPoints.Width; double yFactor = (double)pictureBoxPoints.Image.Height / pictureBoxPoints.Height; double xOffset = _convertedRectangle.X; double yOffset = _convertedRectangle.Y; int imageX = (int)(pointCoordinates.X * xFactor) + […]

Error

Here is how i add and arrange the forms based on their Tag:

private void PictureBoxPoints_Paint(object sender, PaintEventArgs e) { if (pictureBoxPoints.Image != null) { Bitmap bitmap = pictureBoxPoints.Image as Bitmap; double xFactor = (double)bitmap.Width / pictureBoxPoints.Width; double yFactor = (double)bitmap.Height / pictureBoxPoints.Height; double scaleFactor = Math.Max(xFactor, yFactor); // Ensure uniform scaling foreach (System.Drawing.Point point in _dotPoints) { int ellipseSize = (int)(5 / scaleFactor); // Ensure uniform scaling […]

first not sure if i need the paint event and second this code draw the points far on the form not in the picturebox not where i clicked with the mouse on the picturebox.