C# Discussion Boards - CodeProject

25-Jul-06 21:21

Hi all!

I would like to detect that a form has stopped moving. Detecting a move start is very easy, simply the first enter in Form.onMove indicates the starting of the moving Form.

But how do i detect that the Form has stopped moving, onMove isn't called a final time when the Form has stopped moving. Can someone help me out?

Cheers, Richard

Re: Detecting that a Form has stopped moving [modified]

stancrm25-Jul-06 21:32

stancrm

25-Jul-06 21:32

I'm using VS2003 and the event Move comes at the end of moving.

boxed25-Jul-06 22:11

25-Jul-06 22:11

I tried it out, but it is not exactly what i'm looking for.

I'm trying to detect when the user releases this mouse button and drops the Form.

Martin#25-Jul-06 22:34

25-Jul-06 22:34

Hello,

Maybe you should set a flag if the Movement is done.
Then you should watch MouseUp Event. If the flag was set before then you should know that movement is finished.

Hope I helped you

All the best,

Martin

boxed25-Jul-06 23:06

25-Jul-06 23:06

That is also a sollution i thought up. The problem is that i'm using one Form to draw another. So i have to pass the MouseUp event from one Form to the other Form, looks like a new quest... any hints on how to do that?

Martin#25-Jul-06 23:33

Re: Detecting that a Form has stopped moving [modified]

25-Jul-06 23:33

Oooooooook,

Is this next asumption correct?
Form1 is your main Form.
Form1 creates an instance of Form2 during runtime.

So which is now the Form to move?
Should there be an effect on the "not moved Form" by the "moved Form"?
Confused | :confused:

boxed26-Jul-06 0:52

Re: Detecting that a Form has stopped moving [modified]

26-Jul-06 0:52

Yes, your assumption is correct.

Form1 is a with with some transparency and layered window effects. It creates Form2 that has some ordinairy controls. Form2's location is linked to Form1, so when Form1 moves Form2 also moves. When moving Form1, the OnMove event of Form2 is launched so that goed allright. The problem is that is can't seem to get a OnmouseUp/Down/Click event on either Form1 or Form2

The reason for trying to detect the starting en stopping of the Form movement is that i'm trying to emulate the transparency of a Listview. The Listview has a backgroundimage of the underlying desktop. When the Forms start to move i'll set the backgroundimage to none. When the Forms stop moving i'll recreate the underlying background image of the Listview.

-- modified at 7:17 Wednesday 26th July, 2006

I just noticed that the OnMouseUp/Down/Click event only fires when clicked inside the form area and not when clicking on the titlebar area.

Martin#26-Jul-06 1:25

26-Jul-06 1:25

Maybe "LocationChanged" makes it easier for you?

<code> private Form Form2;
private bool block;

/// <summary>
/// Constructor
/// </summary>
public Form1()
{
InitializeComponent();

CreateForm2();
}

private void CreateForm2()
{
Form2 = new Form();
Form2.LocationChanged+=new EventHandler(Form2_LocationChanged);
}

protected override void OnLocationChanged(EventArgs e)
{
DoSomething(true);
base.OnLocationChanged (e);
}

private void Form2_LocationChanged(object sender, EventArgs e)
{
DoSomething(false);
}

private void DoSomething(bool flag)
{
if(block == false)
{
block = true;
if(flag)
{
Form2.Location = Form1.Location;
}
else
{
Form1.Location = Form2.Location;
}
}
else
{
block = false;
}
}</code>

Hope I got it now.

All the best,

Martin

-- modified at 7:25 Wednesday 26th July, 2006

boxed26-Jul-06 1:41

26-Jul-06 1:41

Well actually the linking of the two forms goes allright, here's the code i use:

<br />
Form2.Location = new System.Drawing.Point(this.Location.X + 15, this.Location.Y + 32);<br />

It's the detection of final stop of the Forms movement when the user releases the right mouse button and the Forms settle on the desktop.

Martin#26-Jul-06 1:51

26-Jul-06 1:51

Hello,

I think System.Windows.Forms.Form.DragDrop should do it.
Arrives at end of dragdrop action.

All the best,

Martin

boxed26-Jul-06 4:11