int getPreferredWidth(GC gc) {
int width = ExpandItem.TEXT_INSET * 2 + ExpandItem.CHEVRON_SIZE;
if (image != null) {
width += ExpandItem.TEXT_INSET + imageWidth;
}
if (text.length() > 0) {
width += gc.stringExtent(text).x;
}
return width;
}
void drawChevron(GC gc, int x, int y) {
int[] polyline1, polyline2;
if (expanded) {
int px = x + 4 + 5;
int py = y + 4 + 7;
polyline1 =
new int[] {
px, py, px + 1, py, px + 1, py - 1, px + 2, py - 1, px + 2, py - 2, px + 3, py - 2,
px + 3, py - 3, px + 3, py - 2, px + 4, py - 2, px + 4, py - 1, px + 5, py - 1, px + 5,
py, px + 6, py
};
py += 4;
polyline2 =
new int[] {
px, py, px + 1, py, px + 1, py - 1, px + 2, py - 1, px + 2, py - 2, px + 3, py - 2,
px + 3, py - 3, px + 3, py - 2, px + 4, py - 2, px + 4, py - 1, px + 5, py - 1, px + 5,
py, px + 6, py
};
} else {
int px = x + 4 + 5;
int py = y + 4 + 4;
polyline1 =
new int[] {
px, py, px + 1, py, px + 1, py + 1, px + 2, py + 1, px + 2, py + 2, px + 3, py + 2,
px + 3, py + 3, px + 3, py + 2, px + 4, py + 2, px + 4, py + 1, px + 5, py + 1, px + 5,
py, px + 6, py
};
py += 4;
polyline2 =
new int[] {
px, py, px + 1, py, px + 1, py + 1, px + 2, py + 1, px + 2, py + 2, px + 3, py + 2,
px + 3, py + 3, px + 3, py + 2, px + 4, py + 2, px + 4, py + 1, px + 5, py + 1, px + 5,
py, px + 6, py
};
}
gc.setForeground(display.getSystemColor(SWT.COLOR_TITLE_FOREGROUND));
gc.drawPolyline(polyline1);
gc.drawPolyline(polyline2);
}
void drawItem(GC gc, boolean drawFocus) {
int headerHeight = parent.getBandHeight();
Display display = getDisplay();
gc.setForeground(display.getSystemColor(SWT.COLOR_TITLE_BACKGROUND));
gc.setBackground(display.getSystemColor(SWT.COLOR_TITLE_BACKGROUND_GRADIENT));
gc.fillGradientRectangle(x, y, width, headerHeight, true);
if (expanded) {
gc.setForeground(display.getSystemColor(SWT.COLOR_TITLE_BACKGROUND_GRADIENT));
gc.drawLine(x, y + headerHeight, x, y + headerHeight + height - 1);
gc.drawLine(x, y + headerHeight + height - 1, x + width - 1, y + headerHeight + height - 1);
gc.drawLine(x + width - 1, y + headerHeight + height - 1, x + width - 1, y + headerHeight);
}
int drawX = x;
if (image != null) {
drawX += ExpandItem.TEXT_INSET;
if (imageHeight > headerHeight) {
gc.drawImage(image, drawX, y + headerHeight - imageHeight);
} else {
gc.drawImage(image, drawX, y + (headerHeight - imageHeight) / 2);
}
drawX += imageWidth;
}
if (text.length() > 0) {
drawX += ExpandItem.TEXT_INSET;
Point size = gc.stringExtent(text);
gc.setForeground(parent.getForeground());
gc.drawString(text, drawX, y + (headerHeight - size.y) / 2, true);
}
int chevronSize = ExpandItem.CHEVRON_SIZE;
drawChevron(gc, x + width - chevronSize, y + (headerHeight - chevronSize) / 2);
if (drawFocus) {
gc.drawFocus(x + 1, y + 1, width - 2, headerHeight - 2);
}
}
