How can I draw transparent background on using pocket pc 5.0

I need to create bitmap buttons with round edges.

My forms have a bitmap as backgound and not one solid color.

So I have to make my Bitmap button with transparent color.

I created a png image with transparency and in my user control(for the button) I define the background color as Color.Transparent.

In the visual studio it looks great but when I run the application on the PDA I do not have any transparency not for the png image and not for the user control background is there any good solution for this

Answer this question

How can I draw transparent background on using pocket pc 5.0

ReiXou

hi buddy,

how can u solve that transparent picture box....................

can u possible to give idea
best49erfan
Hi,

I have included some code to help you (and anyone else) with this.

Firstly you will need to import Drawing.Imaging

using System.Drawing.Imaging;

Next you will need to override the Paint method

protected override void OnPaint(PaintEventArgs e)

{

}

Within the Paint method you should assign your image (png, gif, etc) to a Bitmap object. The code below assumes that you have added your image to the Resources and the Image name is MyImage.

protected override void OnPaint(PaintEventArgs e)

{

Bitmap bmp = new Bitmap(Properties.Resources.MyImage);

}

Next you can include the two methods below which you will pass in your Bitmap image. The first requires 4 parameters; your Bitmap, the x & y point where you want your image to appear, and e which already exists within the Paint method. You would use this method if the upper-left pixel of your image was the transparency color.

private void DrawTransparentImage(Bitmap bmp, int x, int y, PaintEventArgs e)

{

//Get the transparency color key based on the upper-left pixel of the image

//and pass into the full DrawTransparentImage method

DrawTransparentImage(bmp, x, y, e, bmp.GetPixel(0, 0));

}

The second DrawTransparentImage method allows you to pass in a specific transparency color (if the upper-left pixel of your image didn't contain the transparency color)

private void DrawTransparentImage(Bitmap bmp, int x, int y, PaintEventArgs e, Color transparencyColor)

{

ImageAttributes attr = new ImageAttributes();

// Set the transparency color.

attr.SetColorKey(transparencyColor, transparencyColor);

// Draw the image using the image attributes.

Rectangle dstRect = new Rectangle(x, y, bmp.Width, bmp.Height);

e.Graphics.DrawImage(bmp, dstRect, 0, 0, bmp.Width, bmp.Height, GraphicsUnit.Pixel, attr);

}

Below is an example of calling the DrawTransparentImage method(s).

protected override void OnPaint(PaintEventArgs e)

{

Bitmap bmp1 = new Bitmap(Properties.Resources.MyImage1);

Bitmap bmp2 = new Bitmap(Properties.Resources.MyImage2);

Bitmap bmp3 = new Bitmap(Properties.Resources.MyImage3);

//The upper-left pixel contains the transparency color for this image

DrawTransparentImage(bmp1, 10, 10, e);

//The transparent color for this image is Green (0, 255, 0), or any other specific color you want

DrawTransparentImage(bmp2, 20, 20, e, Color.FromArgb(0, 255, 0));

//The transparent color for this image is Green

DrawTransparentImage(bmp3, 30, 30, e, Color.Green);

}

Hope this helps you (and others)

Cheers,

Grant.
andien_geo
Thank you , You solved my problem
Vivek Natani
Windows CE doesn't support transparency on a window level. In your case you can emulate this transparency by drawing the form's bitmap area in your control's OnPaint override and then draw your button's image on a top with transparent attributes.
How can I draw transparent background on using pocket pc 5.0

Answer this question