public synchronized void draw() {
gw.clear(1, 1, 1);
gw.setColor(0, 0, 0);
gw.setupForDrawing();
gw.setCoordinateSystemToWorldSpaceUnits();
gw.enableAlphaBlending();
drawing.draw(gw);
gw.setCoordinateSystemToPixels();
for (int j = 0; j < Constant.NUM_USERS; ++j) {
userContexts[j].draw(gw);
}
// Draw some text to indicate the number of fingers touching the user interface.
// This is useful for debugging.
int totalNumCursors = 0;
String s = "[";
for (int j = 0; j < Constant.NUM_USERS; ++j) {
totalNumCursors += userContexts[j].getNumCursors();
s += (j == 0 ? "" : "+") + userContexts[j].getNumCursors();
}
s += " contacts]";
if (totalNumCursors > 0) {
gw.setColor(0, 0, 0);
gw.setFontHeight(Constant.TEXT_HEIGHT);
gw.drawString(Constant.TEXT_HEIGHT, 2 * Constant.TEXT_HEIGHT, s);
}
}
public void draw(GraphicsWrapper gw) {
palette.draw(gw);
// draw filled rectangles over the selected strokes
gw.setCoordinateSystemToWorldSpaceUnits();
for (Stroke s : selectedStrokes) {
AlignedRectangle2D r = s.getBoundingRectangle();
gw.setColor(1.0f, 0.5f, 0, 0.2f); // transparent orange
Vector2D diagonal = r.getDiagonal();
gw.fillRect(r.getMin().x(), r.getMin().y(), diagonal.x(), diagonal.y());
}
gw.setCoordinateSystemToPixels();
// draw cursors
for (int i = 0; i < cursorContainer.getNumCursors(); ++i) {
MyCursor cursor = cursorContainer.getCursorByIndex(i);
if (cursor.type == MyCursor.TYPE_NOTHING)
gw.setColor(0.5f, 0, 0, 0.65f); // red (because this cursor is being ignored)
else gw.setColor(0, 0.5f, 0.5f, 0.65f); // cyan
gw.fillCircle(cursor.getCurrentPosition().x() - 10, cursor.getCurrentPosition().y() - 10, 10);
if (cursor.type == MyCursor.TYPE_INKING) {
// draw ink trail
gw.setColor(0, 0, 0);
gw.drawPolyline(cursor.getPositions());
} else if (cursor.type == MyCursor.TYPE_SELECTION) {
if (cursor.doesDragLookLikeLassoGesture()) {
// draw filled polygon
gw.setColor(0, 0, 0, 0.2f);
gw.fillPolygon(cursor.getPositions());
} else {
// draw polyline to indicate that a lasso could be started
gw.setColor(0, 0, 0);
gw.drawPolyline(cursor.getPositions());
// also draw selection rectangle
gw.setColor(0, 0, 0, 0.2f);
Vector2D diagonal = Point2D.diff(cursor.getCurrentPosition(), cursor.getFirstPosition());
gw.fillRect(
cursor.getFirstPosition().x(),
cursor.getFirstPosition().y(),
diagonal.x(),
diagonal.y());
}
}
}
}
