/**
* Render the label interior as a filled rectangle.
*
* @param dc Current draw context.
*/
protected void drawInterior(DrawContext dc) {
GL gl = dc.getGL();
double width = this.bounds.getWidth();
double height = this.bounds.getHeight();
int x = this.screenPoint.x;
int y = this.screenPoint.y;
// Adjust x to account for text alignment
int xAligned = x;
if (AVKey.CENTER.equals(textAlign)) xAligned = x - (int) (width / 2);
else if (AVKey.RIGHT.equals(textAlign)) xAligned = x - (int) width;
// We draw text top-down, so adjust y to compensate.
int yAligned = (int) (y - height);
// Apply insets
Insets insets = this.getInsets();
xAligned -= insets.left;
width = width + insets.left + insets.right;
yAligned -= insets.bottom;
height = height + insets.bottom + insets.top;
if (!dc.isPickingMode()) {
// Apply the frame background color and opacity if we're in normal rendering mode.
Color color = this.computeBackgroundColor(this.getMaterial().getDiffuse());
gl.glColor4ub(
(byte) color.getRed(),
(byte) color.getGreen(),
(byte) color.getBlue(),
(byte) (this.interiorOpacity < 1 ? (int) (this.interiorOpacity * 255 + 0.5) : 255));
}
try {
// Draw a quad
gl.glPushMatrix();
gl.glTranslated(xAligned, yAligned, 0);
gl.glScaled(width, height, 1.0);
dc.drawUnitQuad();
} finally {
gl.glPopMatrix();
}
}
/**
* Determine the screen rectangle covered by a label. The input coordinate identifies either the
* top left, top center, or top right corner of the label, depending on the text alignment. If the
* label is rotated to align with features on the surface then the extent will be the smallest
* screen rectangle that completely encloses the rotated label.
*
* @param x X coordinate at which to draw the label.
* @param y Y coordinate at which to draw the label.
* @param rotation Label rotation.
* @return The rectangle, in OGL screen coordinates (origin at bottom left corner), that is
* covered by the label.
*/
protected Rectangle computeTextExtent(int x, int y, Angle rotation) {
double width = this.bounds.getWidth();
double height = this.bounds.getHeight();
String textAlign = this.getTextAlign();
int xAligned = x;
if (AVKey.CENTER.equals(textAlign)) xAligned = x - (int) (width / 2);
else if (AVKey.RIGHT.equals(textAlign)) xAligned = x - (int) width;
int yAligned = (int) (y - height);
Rectangle screenRect = new Rectangle(xAligned, yAligned, (int) width, (int) height);
// Compute bounds of the rotated rectangle, if there is a rotation angle.
if (rotation != null && rotation.degrees != 0) {
screenRect = this.computeRotatedScreenExtent(screenRect, x, y, rotation);
}
return screenRect;
}