Draw rectangle from right to left

A D

Hi everybody,

I want to draw some rectangles from right to left on a Panel wich is on TabControl
TabControl.RightToLeft : yes
TabControl.RightToLeftLayout : true
I use :
Point.Location= new system.drawing.point(x,y);
Point.size=new system.drawing.size(width, height)
these rectangles must be drawn from right to left according with TabControl, with certainly a loop for
Thank you very much for your help

5 Replies

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Danatas Gervi17y ago
Accepted answer
You cannot use my code "as is". Correction is absolutely nessesary.
I try to show only prinsipal solution.
Here is more common version:
private void tabPage1_Click(object sender, EventArgs e)
    {
        int x = 10;
        int y = 10;
        int width = 40;
        int height = 50;
        Point Location = new Point(x, y);
        Size size = new Size(width, height);

        Rectangle rect = new Rectangle(Location, size);
        Pen rectPen = new Pen(Brushes.Blue, 4);

        this.RightToLeft = RightToLeft.Yes;  //
                                             //this.RightToLeft = RightToLeft.No; // comment this!
        TabPage tPage = tabControl1.TabPages[0];
        if (this.RightToLeft == RightToLeft.Yes)
        {
            rect.Location = new Point(tPage.Width - rect.Size.Width - rect.Location.X, rect.Location.Y);
        }
        tPage.CreateGraphics().DrawRectangle(rectPen, rect);
    }
Have a look -
```
tPage.Width - rect.Size.Width - rect.Location.X

this is reversing (mirroring) the location of rectangle.
```
A D17y ago
Hi,
Thank you very much, it works very well.
I have added a Splitter (Dock.right) just before my tabPage and when the splitter moves the rectangle drawn on the tabPage desappears.
I think I must add some thing about the splitter x coordinate to counter this problem
Thank you for your help
A D17y ago
Thank you for replay, I've tried it but it doesn't work
Danatas Gervi17y ago
So, you can calculate the correct start point:
this.RightToLeft = RightToLeft.Yes;

     //tabControl1.TabPages[0].CreateGraphics().DrawRectangle(rectPen, 10, 10, 40, 50);
     if (this.RightToLeft == RightToLeft.Yes)
     {
         TabPage tPage = tabControl1.TabPages[0];
         tPage.CreateGraphics().DrawRectangle(rectPen, tPage.Width - 10 - 40, 10, 40, 50);
     }
Danatas Gervi17y ago
If you will use .CreateGrafic() from any Control - the coordinates of this grafic will be relative to this control
Pen rectPen = new Pen(Brushes.Blue, 4);
        tabControl1.CreateGraphics().DrawRectangle(rectPen, 10, 10, 40, 50);
        // this is better:
        tabControl1.TabPages[0].CreateGraphics().DrawRectangle(rectPen, 10, 10, 40, 50);