OnMouseEnter

August 17th, 2010, 07:14 AM

I have searched futures.io (formerly BMT), Ninja and MSDN but have been unable to resolve an issue.
Is it possible to put a rectangle or a button on a panel and then have it change colour upon the mouse entering it and leaving it?
sounds simple?

I can get the button to change colour upon clicking it but the OnMouseEnter and OnMouseLeave methods stubbornly refuse to co operate.

Any help much appreciated.

August 17th, 2010, 10:41 AM

with a button it can be easily done. just set a MouseEnter/MouseLeave event.

Code

btn.MouseEnter += new EventHandler(mouse_enter);

Code

private void mouse_enter(object sender,EventArgs e)
        {
            btn.BackColor = Color.Green;
        }

edit: i just have a peep at your code. you got to add the button FormButton to the chartpanel. you havent done that.

Code

panel.Controls.Add(FormButton);

and do remember to remove it on termination.

August 18th, 2010, 10:09 AM

Bukkan

Many thanks - I had the FormButton Control posted in chartcontrol - hence all my issues.

One final thing the button sits 'on top' of the chart and I would like to make it invisible - sort of like a hotspot on a web page.
I tried FormButton.Visible = false;
but that means OnMouseEnter no longer works - I guess the control is no longer visible to the mouse?
any ideas?

August 18th, 2010, 11:40 AM

Mindset

Bukkan

Many thanks - I had the FormButton Control posted in chartcontrol - hence all my issues.

One final thing the button sits 'on top' of the chart and I would like to make it invisible - sort of like a hotspot on a web page.
I tried FormButton.Visible = false;
but that means OnMouseEnter no longer works - I guess the control is no longer visible to the mouse?
any ideas?

i dont know whether its a elegant approach or not but you can try this.

OnStartUp

Code

ChartControl.ChartPanel.MouseMove += new MouseEventHandler(panel_enter);

panel enter

Code

private void panel_enter(object sender,MouseEventArgs e)
{
       //assuming the button is placed at point X=100,Y=100, change 100 with your own location start points
       if (e.X >= 100 && e.X < 100 + btn.Width && e.Y >= 100 && e.Y <= 100 + btn.Height)
       {
              btn.Visible = true;
       }
        else {btn.Visible = false;}
}

OnTermination

Code

ChartControl.ChartPanel.MouseMove -= new MouseEventHandler(panel_enter);

p.s. - btn = Button

August 18th, 2010, 12:35 PM

Excellent work!
I have now completed my trade aid.
I will post it in the download section at some point tomorrow.

OnMouseEnter

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OnMouseEnter