private void initializeCanvas() {
panel.setSize(50 + 1 + graphWidth + "px", 25 + graphHeight + "px");
canvas.setWidth(graphWidth);
canvas.setHeight(graphHeight);
canvas.getElement().getStyle().setPropertyPx("width", graphWidth);
canvas.getElement().getStyle().setPropertyPx("height", graphHeight);
}
private void paintGraph() {
selectionBox.setSelectionBoxVisible(false);
fps = 1f / ((System.currentTimeMillis() - paintStartTime) / 1000f);
paintStartTime = System.currentTimeMillis();
if (showInfo) {
if (info != null) {
canvas.remove(info);
}
canvas.add(info = getInfo());
}
}
private void removeLinkLine() {
if (linkLine != null) {
canvas.remove(linkLine);
linkLine = null;
}
onLink = false;
}
private void removeSelectionBox() {
if (selectionBox.isSelectionBoxVisible()) {
canvas.remove(selectionBox);
selectionBox.setSelectionBoxVisible(false);
VConsole.log("selection box removed from canvas");
selectionBox.setSelectionBoxRightHandSide(true);
}
}
@Override
public void onMouseMove(final MouseMoveEvent event) {
final int currentX = event.getX();
final int currentY = event.getY();
if (selectionBox.isSelectionBoxVisible()) {
selectionBox.drawSelectionBox(canvas, currentX, currentY);
} else if (graph.getMovedShape() != null) {
final VNode moved = graph.getMovedShape();
moved.moveNode(currentX, currentY);
} else if (onLink) {
if (linkLine != null) {
canvas.remove(linkLine);
}
linkLine = getLinkLine(currentX, currentY);
canvas.add(linkLine);
} else if (onMove && event.getSource().equals(canvas)) {
graph.moveGraph(startX - currentX, startY - currentY);
startX = currentX;
startY = currentY;
}
}
private VectorObject getInfo() {
final NumberFormat df = NumberFormat.getDecimalFormat();
final String zoom = df.format(zoomFactor);
final String angl = df.format(angle);
final String fpss = df.format(fps);
final Text info =
new Text(canvas.getWidth() - 130, 10, "Zoom: " + zoom + " Rot.: " + angl + " Fps " + fpss);
info.setStrokeOpacity(0);
info.setFillColor(style.getEdgeColor());
info.setFontSize(8);
return info;
}
/**
* The constructor should first call super() to initialize the component and then handle any
* initialization relevant to Vaadin.
*/
public VCytographer() {
panel = new FocusPanel();
panel.setSize(graphWidth + "px", graphHeight + "px");
panel.addKeyDownHandler(this);
panel.addKeyUpHandler(this);
canvas = new VFocusDrawingArea(this, graphWidth, graphHeight);
canvas.addKeyDownHandler(this);
canvas.addKeyUpHandler(this);
canvas.addMouseMoveHandler(this);
canvas.addDoubleClickHandler(this);
canvas.addMouseUpHandler(this);
canvas.addMouseDownHandler(this);
canvas.addClickHandler(this);
canvas.addMouseWheelHandler(this);
graph = new VGraph(this, style, canvas, graphWidth, graphHeight);
panel.add(canvas);
canvas.add(graph);
initWidget(panel);
setStyleName(CLASSNAME);
DOM.setStyleAttribute(canvas.getElement(), "border", "1px solid black");
disableContextMenu(canvas.getElement());
}
