/**
* Draws text at the top of the VGField
*
* @param vg The object that will be used to render the text
*/
public void drawText(final VG11 vg) {
vg.vgSeti(VG10.VG_MATRIX_MODE, VG10.VG_MATRIX_IMAGE_USER_TO_SURFACE);
// Load a clean identity matrix
vg.vgLoadIdentity();
// Translate to the next drawing location
vg.vgTranslate(0.0f, _displayHeight - TEXT_OFFSET);
// Draw the text on the display
vg.vgDrawImage(_textImage);
}
/** @see net.rim.device.api.openvg.VGField#render(VG) */
protected void render(final VG g) {
final VG11 vg = (VG11) g;
// Clear the display
vg.vgClear(0, 0, getWidth(), getHeight());
vg.vgSeti(VG10.VG_MATRIX_MODE, VG10.VG_MATRIX_IMAGE_USER_TO_SURFACE);
// Shifting bits by >> 1 is equivalent to division by 2
final float halfIconWidth = ICON_WIDTH >> 1;
// Go through all the images and rotate them
// around the center of the screen.
for (int i = 0; i < _imageHandles.length; i++) {
// Load clean Identity matrix
vg.vgLoadIdentity();
// Translate to the center of the display
vg.vgTranslate(_xScreenCenter, _yScreenCenter);
// Rotate the image
vg.vgRotate(_mainRotation.getFloat() + ROTATE * i);
// Translate the image half of the icon's width
vg.vgTranslate(-halfIconWidth, RADIUS);
// Draw the rotated, translated image
vg.vgDrawImage(_imageHandles[i]);
}
// Draw the text image on this field
drawText(vg);
}
/** @see net.rim.device.api.openvg.VGField#initialize(VG) */
protected void initialize(final VG g) {
final VG11 vg = (VG11) g;
vg.vgSetfv(VG10.VG_CLEAR_COLOR, 4, MY_CLEAR_COLOR, 0);
final XYRect rect = new XYRect();
// Create the bitmap from bundled resource "icons.png"
final Bitmap bitmap = Bitmap.getBitmapResource("icons.png");
// Create the image for all the icons
for (int i = 0; i < _imageHandles.length; i++) {
// Update the XYRect in which the image will be displayed
updateRect(rect, i);
_imageHandles[i] =
VGUtils.vgCreateImage(vg, bitmap, true, VG10.VG_IMAGE_QUALITY_BETTER, rect);
}
// Get the default font and its FontSpec
final Font font = Font.getDefault();
final FontSpec fontSpec = font.getFontSpec();
// Create text image
_textImage =
VGUtils.vgCreateTextAsImage(vg, fontSpec, "Tap or click to swap screens", null, null);
// Set up the animation. The animation will animate a scalar float value
// (_mainRotation) from 360 to 0 over 3 seconds and will repeat
// indefinitely.
_animator = new Animator(0);
final Animation animation =
_animator.addAnimationFromTo(
_mainRotation,
AnimatedScalar.ANIMATION_PROPERTY_SCALAR,
360.0f,
0.0f,
Animation.EASINGCURVE_LINEAR,
3000L);
animation.setRepeatCount(Animation.REPEAT_COUNT_INDEFINITE);
_animator.begin(0L);
}