How to align an Image at the Middle pos of the BB Device Screen.

[Biswas]

Hi,

I am begginer of BlackBerry application. I have extends FullScreen in my application. I want to display an image at the middle position of the screen. I did not find any methods to do this.
Pls Help me to go ahead.

device screen width is : 240
device screen height is : 260

and,

Image width is: 47
Image Height is :75

Thanks,

Shwarup Biswas.

[fbrimm]

Hello Biswas,

Here is how I handle centering a background image on the screen.

fbrimm

background = Bitmap.getBitmapResource("MyBackground.jpg");
HorizontalFieldManager myHFM = new HorizontalFieldManager(HorizontalFieldManager.NO_HORIZONTAL_SCROLL | HorizontalFieldManager.NO_VERTICAL_SCROLL | Manager.USE_ALL_HEIGHT) {
    //Override the paint method to draw the background image.
    public void paintBackground(Graphics graphics) {
        int startX = 0;
        int startY = 0;
                
        // Determine where to center image
        if (this.getVisibleWidth() > background.getWidth()) {
            startX = (this.getVisibleWidth() - background.getWidth()) / 2;
        }
        if (this.getVisibleHeight() > background.getHeight()) {
            startY = (this.getVisibleHeight() - background.getHeight()) / 2;
        }
                                
        //Draw the background image and then call paint.
        graphics.drawBitmap(startX, startY, background.getWidth(), background.getHeight(), background, 0, 0);
                
        super.paintBackground(graphics);
    }
};

[Biswas]

Originally Posted by fbrimm

Hello Biswas,

Here is how I handle centering a background image on the screen.

fbrimm

background = Bitmap.getBitmapResource("MyBackground.jpg");
HorizontalFieldManager myHFM = new HorizontalFieldManager(HorizontalFieldManager.NO_HORIZONTAL_SCROLL | HorizontalFieldManager.NO_VERTICAL_SCROLL | Manager.USE_ALL_HEIGHT) {
    //Override the paint method to draw the background image.
    public void paintBackground(Graphics graphics) {
        int startX = 0;
        int startY = 0;
                
        // Determine where to center image
        if (this.getVisibleWidth() > background.getWidth()) {
            startX = (this.getVisibleWidth() - background.getWidth()) / 2;
        }
        if (this.getVisibleHeight() > background.getHeight()) {
            startY = (this.getVisibleHeight() - background.getHeight()) / 2;
        }
                                
        //Draw the background image and then call paint.
        graphics.drawBitmap(startX, startY, background.getWidth(), background.getHeight(), background, 0, 0);
                
        super.paintBackground(graphics);
    }
};

Hi,

Thanks for your reply.

Regards,
Shwarup Biswas.

[dangihitesh]

Hi,

How can it be possible?????????

U r using HorizontalFieldManager and u r overriding paintBackground() method, but there is no paintBackground() method in HorizontalFieldManager class Hierarchy.....


How these method can be overriden?????
I did't getting it???

Plz anybody help me....

[xxxdev]

Originally Posted by fbrimm

Hello Biswas,

Here is how I handle centering a background image on the screen.

fbrimm

background = Bitmap.getBitmapResource("MyBackground.jpg");
HorizontalFieldManager myHFM = new HorizontalFieldManager(HorizontalFieldManager.NO_HORIZONTAL_SCROLL | HorizontalFieldManager.NO_VERTICAL_SCROLL | Manager.USE_ALL_HEIGHT) {
    //Override the paint method to draw the background image.
    public void paintBackground(Graphics graphics) {
        int startX = 0;
        int startY = 0;
                
        // Determine where to center image
        if (this.getVisibleWidth() > background.getWidth()) {
            startX = (this.getVisibleWidth() - background.getWidth()) / 2;
        }
        if (this.getVisibleHeight() > background.getHeight()) {
            startY = (this.getVisibleHeight() - background.getHeight()) / 2;
        }
                                
        //Draw the background image and then call paint.
        graphics.drawBitmap(startX, startY, background.getWidth(), background.getHeight(), background, 0, 0);
                
        super.paintBackground(graphics);
    }
};

Hello, I know better way

Bitmap bmp = Bitmap.getBitmapresources (...);
BitmapField bf = new BitmapField ( bmp );
bf.setSpace (Graphics.getScreenWidth()/2 - bmp.getWidth()/2,
Graphics.getScreenHeight()/2 - bmp.getHeight()/2 );

screen.add (bf);

XXXDev