Panel drawing problems.

[Leif Eirik Olsen]

Hi,

I have some code I'm using in a CompactFramewor k project. The code works as
expected on the CF, but when using this code on the FullFramework (FF) it
does not work the way I want. It copiles ok, but the screendrawing is not
working 100%.

What the code is supposed to do:
Draw recieved values to a panel so values are displayed countiniously as a
scrolling graph.
Too do the 'scrolling' I first copy the existing bitmap from my panel and
draw it back -1 position to the left.
Then I clear the rightmost part of the panel
and finally draw the new recieved value on the newly cleared area.

It is the 'scrolling' part that is not working on FF.

Does anyone have any hints or clues on what I'm doing wrong here ? (Please
see code below)


/*From constructor
DrawBitMap = new Bitmap(DrawPane l.Width, DrawPanel.Heigh t);
DrawGrapics = Graphics.FromIm age(DrawBitMap) ;
*/

internal void DrawAdvancedMod e(int sample)
{
int h = DrawPanel.Heigh t;
int w = DrawPanel.Width - 1;
DrawGrapics.Dra wImage(DrawBitM ap, -1, 0); // scroll left. I think this
where the problem is*******
DrawGrapics.Fil lRegion(WhiteBr ush, new Region(new Rectangle(w - 1, 0, w,
h))); // clear plot region

int y = h-(int)((double)h * ((double)sample/MAX_SAMPLE));
int x = w - 1 + i;

// plot
DrawGrapics.Dra wLine(BluePen, x, y, LastPoint.X, LastPoint.Y);
DrawPanel.Inval idate();
LastPoint.X = x;
LastPoint.Y = y;
LastPoint.X -= 1;
}

Thanks for reading.

regards,
Leo

[Leif Eirik Olsen]

Additional information.

Hi again,

Forgot to post this code, and guess it is needed :)

/*from constructor
DrawPanel.Paint += new PaintEventHandl er(PaintPanelSi gnal);
*/

internal void PaintPanelSigna l(object sender,
System.Windows. Forms.PaintEven tArgs e)
{
e.Graphics.Draw Image(DrawBitMa p, 0, 0);
}


regards,
Leo

[Leif Eirik Olsen]

Re: Panel drawing problems.

Me again:)

I just noticed the group 'dotnet.framewo rk.drawing'. and as that looks like
a more appropriate group for my question I've asked my question there.

Subject "Scroll Panel Image"

regards,
Leo