PictureBox: Scale Width & Height

[DanDanDan1]

Hey everyone, once again your help is needed.

In Visual Basic 6.0 you could set the scale height and width properties of a picturebox, In C# those properties don't exist.


Could someone please help me set the following properties...

ScaleHeight = 5356
ScaleWidth = 5600


How would I go about doing this.


Thanks for any help.

[Hack]

From MSDN

[DanDanDan1]

This is making no sense, Could you maybe show me an example for a Picturebox, I'm very new too c#.

Thanks for any help.

[jcis]

ScaleMode, ScaleWidth, ScaleHeight, ScaleLeft, ScaleTop are no present in .NET.
Are you drawing in the PictureBox or just Loading Images? Maybe there is another way to do what you need, maybe Using Graphics class.

[DanDanDan1]

I have a list of coordinates which I need to draw a line though each of these X & Y coordinates.

I have done this in VB but I had to set the scale properties to those in my previous post for it to work.

There must be a way, why would they take out such a useful property

[DanDanDan1]

Basically I just want the picturebox to have...

5356 coordinates High
5600 coordinates wide

Anyone got any ideas.

[jcis]

How do you make your drawing? maybe you could get the ratio between the coordinate where you want to draw and your Height/Width, and then use it to get the corresponding position in the PictureBox in Pixels.
Are you drawing in Paint event? or using Graphics DrawLine method?

[DanDanDan1]

This is my drawing, those values will be different depending on the plot file I load in, I just set out these coordinates to test it before I continue.

        private void PB1_Paint(object sender, PaintEventArgs e)
        {

            
            PB1.BackColor = Color.White;

            e.Graphics.DrawLine(Pens.Black, 3947, 2004, 3947, 2004);
            e.Graphics.DrawLine(Pens.Black, 9868, 7812, 9868, 7812);
            e.Graphics.DrawLine(Pens.Black, 3947, 3122, 3947, 3122);
            e.Graphics.DrawLine(Pens.Black, 8634, 10604, 8634, 10604);
            e.Graphics.DrawLine(Pens.Black, 3454, 4238, 3454, 4238);
            e.Graphics.DrawLine(Pens.Black, 7000, 11398, 7000, 11398);
            e.Graphics.DrawLine(Pens.Black, 2800, 4556, 2800, 4556);
            e.Graphics.DrawLine(Pens.Black, 300, 11398, 300, 11398);

        }

This doesn't draw anything and I assume that is bcos most of those coordinates don't exist.

[DanDanDan1]

Any ideas anyone? this is really important.

Thanks for any more help.

[jcis]

That code won't draw anything, why are you passing X1 = X2 and Y1 = Y2??
Origin and target points are the same there.

[DanDanDan1]

Oh yea how stupid of me lol,

Still I only see one line now, the rest must be off the screen as these coordinates dont exist. Now I'm drawing like this.

        private void PB1_Paint(object sender, PaintEventArgs e)
        {

            
            PB1.BackColor = Color.White;


            e.Graphics.DrawLine(Pens.Black, 3947, 3947, 2004, 2004);
            e.Graphics.DrawLine(Pens.Black, 9868, 9868, 7812, 7812);
            e.Graphics.DrawLine(Pens.Black, 3947, 3947, 3122, 3122);
            e.Graphics.DrawLine(Pens.Black, 8634, 8634, 10604, 10604);
            e.Graphics.DrawLine(Pens.Black, 3454, 3454, 4238, 4238);
            e.Graphics.DrawLine(Pens.Black, 7000, 7000, 11398, 11398);
            e.Graphics.DrawLine(Pens.Black, 2800, 2800, 4556, 4556);
            e.Graphics.DrawLine(Pens.Black, 300, 300, 11398, 11398);


        }

[jcis]

Coordinates are still wrong, you are drawing just inside that line you see because X1 = Y1 and X2 = Y2, I can make an ScaleWidth and ScaleHeight Subs in C# but you have something valid to draw?

[DanDanDan1]

Ahhh I'm lost then lol, in VB coordinates were just .line x , y but in c# I have for arguments, that would be great if you could do me a sub. I would be really greatful. I'll get back to ya with something valid to draw lol, Ill just see if I can get my head around this.

Thanks again

[jcis]

Add this on Top (Form level)

   private int mScaleWidth  = 5600;
   private int mScaleHeight = 5356;

Then this is the Paint Event named PaintIt (you can use another name) and a drawLine sub, use this one instead of e.Graphics.DrawLine

	private void PaintIt(object sender, System.Windows.Forms.PaintEventArgs e)
	{
		PB1.BackColor = System.Drawing.Color.White;
		
		//Square
		drawLine(e.Graphics, Pens.Black ,   1000, 1000, 2000, 1000);
		drawLine(e.Graphics, Pens.Black, 2000, 1000, 2000, 2000);
		drawLine(e.Graphics, Pens.Black, 2000, 2000, 1000, 2000);
		drawLine(e.Graphics, Pens.Black, 1000, 2000, 1000, 1000);
	}

	private void drawLine(Graphics Gr,Pen  Pn, int X1, int Y1, int X2, int Y2)
	{
		int ScaledX1 = (int) (((float) X1 / mScaleWidth) * PB1.ClientSize.Width);
		int ScaledX2 = (int) (((float) X2 / mScaleWidth) * PB1.ClientSize.Width);
		int ScaledY1 = (int) (((float) Y1 / mScaleHeight) * PB1.ClientSize.Height);
		int ScaledY2 = (int) (((float) Y2 / mScaleHeight) * PB1.ClientSize.Height);

		Gr.DrawLine (Pens.Black ,ScaledX1, ScaledY1, ScaledX2,ScaledY2);
	}

That should draw a Square using your coordinate system.

[DanDanDan1]

Thank you soooo much for all of your help, that seems to do what I want. I sort of understand what you have done there now.

I just have one more problem lol, The coordinates which I will be putting in to this only have two values, 1 of X and 1 of Y.

I dont see how I can enter just two values as this coordinate system seems different as to VB where .line only wanted those two values.

[jcis]

In VB6 Line method of a Form or PictureBox also uses X1, Y1, X2, Y2

Picture1.Line (100, 100)-(500, 500)

So I think your VB code is doing something else, can you post some of it using VBCODE tags?

[DanDanDan1]

If Machine = 5 And SentXys > 1 Then
YMaths = (DrawYlength - (DrawY + DrawChange))
YMaths2 = ((YMaths / 10) * 4)
DrawY = (BaseLine - YMaths2)
DrawX = ((DrawX / 10) * 4)
 
If Delay = True Then
        dblClock = Timer
        'Delay the drawing
        While Timer < dblClock + 0.1
            DrawAPlot2.XY5Machine.Line -(DrawX, DrawY)
            DoEvents
        Wend
Else
    DrawAPlot2.XY5Machine.Line -(DrawX, DrawY)
End If

XY5Machine is the name of the PictureBox,

I think I should just give up lol seems impossible to get this right

[jcis]

.Line -(DrawX, DrawY)

That Uses 2 parameters because it draws from the last position to the new Point, the Origin coordinates are not explicit because the Origin is the coordinate where the last line ended.
You can achieve the same if you use the last X2, and Y2 values as X1 and Y1 in the next line, see my square, Each X1, Y1 are equal to X2, Y2 in the previous Line.
You can also use the method: Graphics.drawLines, it takes an array of Points (X,Y) as parameter and creates lines that Join them.
About your VB code it is not very descriptive, you didn't post events and each object/variable declaration, so i can't Run it as it is there.

[DanDanDan1]

Thanks for all the help it really is appreciated but I think this project is way beyond my capability at the moment lol so I think I will come back to it once I have more experience.

Sorry to waste your time, and thanks again for all you help.