/**
* Render cells, starting at specified item.
*
* @param graphics
* @param treemap
* @param item
* @param active
*/
public void renderTree(TreemapGraphics graphics, Treemap treemap, Object item, boolean active) {
TreemapCell cell = treemap.getCell(item);
if (cell == null) {
return;
}
boolean visible = cell.isLeaf() || cell.getFramed() != null;
Object value = cell.getValue();
if (active) {
if (visible) {
graphics.fill(cell, colorProvider.getHighlightColor(item, value));
}
} else {
Rectangle borders = cell.getBorders();
if (borders != null) {
graphics.fill(borders, colorProvider.getBorderColor(item, value));
}
if (visible) {
Color color1 = colorProvider.getBackgroundColor(item, value);
Color color2 = colorProvider.getBackgroundGradientColor(item, value);
graphics.fill(cell, color1, color2);
}
}
if (!cell.isLeaf()) {
Rectangle framed = cell.getFramed();
if (framed != null) {
graphics.fill(framed, colorProvider.getBorderColor(item, value));
}
for (Object node : cell.getChildren()) {
renderTree(graphics, treemap, node, false);
}
}
}
private boolean renderLabel(TreemapGraphics graphics, TreemapCell cell, Object item) {
Rectangle framed = cell.getFramed();
int width = framed != null ? (cell.width - framed.width) / 2 : cell.width;
int height = framed != null ? (cell.height - framed.height) / 2 : cell.height;
Object value = cell.getValue();
String label = labelProvider.getText(item, value);
Dimension dimension = graphics.getDimension(label);
Point anchor = null;
boolean vertical = false;
if (dimension.width <= cell.width - labelSpaceLR
&& dimension.height <= height - labelSpaceTB) { // string fits horizontally
anchor = new Point((cell.width - dimension.width) / 2, (height - dimension.height) / 2);
} else if (dimension.width <= cell.height - labelSpaceLR
&& dimension.height <= width - labelSpaceTB) { // string fits vertically
anchor = new Point((width - dimension.height) / 2, (cell.height + dimension.width) / 2);
vertical = true;
} else if (truncateLabelMode
!= TruncateLabelMode.NoTruncate) { // string doesn't fit, try to truncate...
String hLabel = null;
if (dimension.height <= height - labelSpaceTB) {
hLabel = truncateLabel(label, cell.width - labelSpaceLR, dimension.width, 3);
}
String vLabel = null;
if (dimension.height <= width - labelSpaceTB
&& (hLabel == null || cell.height > cell.width)) {
vLabel = truncateLabel(label, cell.height - labelSpaceLR, dimension.width, 3);
}
if (hLabel != null
&& (vLabel == null || hLabel.length() >= vLabel.length())) { // ... horizontally
dimension = graphics.getDimension(hLabel);
anchor = new Point((cell.width - dimension.width) / 2, (height - dimension.height) / 2);
label = hLabel;
} else if (vLabel != null) { // ... vertically
dimension = graphics.getDimension(vLabel);
anchor = new Point((width - dimension.height) / 2, (cell.height + dimension.width) / 2);
label = vLabel;
vertical = true;
}
}
if (anchor == null) {
return false;
}
// label background in dark gray
Color shadow = colorProvider.getForegroundShadowColor(item, value);
if (shadow != null) {
graphics.draw(label, cell.x + anchor.x + 1, cell.y + anchor.y, shadow, vertical);
graphics.draw(label, cell.x + anchor.x - 1, cell.y + anchor.y, shadow, vertical);
graphics.draw(label, cell.x + anchor.x, cell.y + anchor.y + 1, shadow, vertical);
graphics.draw(label, cell.x + anchor.x, cell.y + anchor.y - 1, shadow, vertical);
}
// label in foreground color
Color foreground = colorProvider.getForegroundColor(item, value);
graphics.draw(label, cell.x + anchor.x, cell.y + anchor.y, foreground, vertical);
return true;
}