Re: how to sort an int arraylist - C# Discussion Boards

Mike Hankey20-Oct-07 10:33

20-Oct-07 10:33

private Point offset = new Point(0);
private bool mouseDown = false;
private Point pt = new Point(0);
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
mouseDown = true;

offset.X = e.X;
offset.Y = e.Y;
}

private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
mouseDown = false;
}

private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (mouseDown)
{
pt.X += e.X - offset.X;
pt.Y += e.Y - offset.Y;
pictureBox1.Location = pt;
}
}

Good luck,
Mike

-- modified at 18:38 Saturday 20th October, 2007

Life is not measured by the number of breaths we take, but by the
moments that take our breath away. "George Carlin"

line to mouse

MasterSharp19-Oct-07 11:23

MasterSharp

19-Oct-07 11:23

Why doesn't this make a line that starts at 0,0, and ends where he mouse is? It worked a bit earlier, but now it doesn't.

private void Form1_Paint(object sender, PaintEventArgs e)<br />
        {<br />
            int x1 = MousePosition.X;<br />
            int y1 = MousePosition.Y;<br />
<br />
            Graphics A = e.Graphics;<br />
            Pen BluePen = new Pen(Color.Blue, 3);<br />
            A.DrawLine(BluePen, 0, 0, x1, y1);<br />
<br />
            A.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;<br />
        }<br />
<br />
        private void Animator_Tick(object sender, EventArgs e)<br />
        {<br />
            this.Invalidate();<br />
        }

This only works works if I invalidate in Form1_Paint, but then I get a low-quality image. Thanks in advance.

The most knowledge doesn't mean the most wise...

Re: line to mouse

led mike19-Oct-07 11:37

led mike

19-Oct-07 11:37

MasterSharp wrote:
but now it doesn't.

what does "it doesn't" mean?

Re: line to mouse

MasterSharp19-Oct-07 11:50

MasterSharp

19-Oct-07 11:50

It means, that the form doesn't Invalidate() as far as I can tell. If you try that code (with a timer named Animator) and copy and paste it, you'll know what I mean. I want there to be a line connected to the cursor from 0,0 (don't ask why).

The most knowledge doesn't mean the most wise...

Re: line to mouse

Luc Pattyn19-Oct-07 12:03

Luc Pattyn

19-Oct-07 12:03

Hi,

some remarks:

1. Are you sure your tick is executed at all? Maybe you did something wrong with the timer.

2. Invalidate() will fail when not executed by the thread that created its object (this).
Make sure you are using the right kind of timer.

3. It is a bad idea to have a Paint routine that uses volatile inputs such as MousePosition:
the Paint handler will be called when you call Invalidate(), but also when Windows decides
it is necessary (e.g. because you are dragging another window over it, at which time the
mouse position does not make sense to your Paint at all).

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

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Re: line to mouse

MasterSharp19-Oct-07 12:06

MasterSharp

19-Oct-07 12:06

Oh... my timer was NOT on... but it was a bit earlier and it still didn't work, so thanks for me being stupid... Frown | :(

:-DThanks, though...

The most knowledge doesn't mean the most wise...

how to sort an int arraylist

Daniel_Logan19-Oct-07 11:10

Daniel_Logan

19-Oct-07 11:10

Im writing a console application programme where the user has input 5 number which are loaded into an array list. Now after thios has happened the user selects one of 2 options. 1 is to sort them in an ascending order and 2; descending. can you help by showing me the code to sort the numbers in the array.
Thanx
Daniel