protected void drawBackground(QPainter painter, QRectF exposed) {
// Draws all tiles that intersect the exposed area.
for (int y = 0; y < numTilesV; ++y) {
for (int x = 0; x < numTilesH; ++x) {
QRectF rect = rectForTile(x, y);
if (exposed.intersects(rect)) painter.drawPixmap(rect.topLeft(), tiles[y][x]);
}
}
}
@Override
protected void paintEvent(QPaintEvent e) {
QPainter p = new QPainter(this);
switch (transition) {
case Fade:
p.drawPixmap(0, 0, start);
p.setOpacity(level);
p.drawPixmap(0, 0, end);
break;
case ScrollLeft:
p.drawPixmap(0, 0, end);
p.drawPixmap((int) (level * width()), 0, start);
break;
case ScrollRight:
p.drawPixmap(0, 0, end);
p.drawPixmap((int) (-level * width()), 0, start);
break;
case ScrollUp:
p.drawPixmap(0, 0, end);
p.drawPixmap(0, (int) (-level * height()), start);
break;
case ScrollDown:
p.drawPixmap(0, 0, end);
p.drawPixmap(0, (int) (level * height()), start);
break;
case SplitHorizontal:
if (level < 0.2) {
level *= 5;
p.drawLine(0, height() / 2, (int) (level * width()), height() / 2);
} else {
level = (level - 0.2) / 0.8;
int h2 = start.height() / 2;
p.drawPixmap(0, 0, end);
p.drawPixmap(
0, (int) (-level * height()), start.width(), h2, start, 0, 0, start.width(), h2);
p.drawPixmap(
0,
(int) (level * height()) + h2,
start.width(),
h2,
start,
0,
h2,
start.width(),
h2);
}
break;
case SplitVertical:
if (level < 0.2) {
level *= 5;
p.drawLine(width() / 2, 0, width() / 2, (int) (level * height()));
} else {
level = (level - 0.2) / 0.8;
int w2 = start.width() / 2;
p.drawPixmap(0, 0, end);
p.drawPixmap(
(int) (level * width()) + w2,
0,
w2,
start.height(),
start,
w2,
0,
w2,
start.height());
p.drawPixmap(
(int) (-level * height()), 0, w2, start.height(), start, 0, 0, w2, start.height());
}
break;
case Rotate:
p.eraseRect(rect());
p.setRenderHint(RenderHint.SmoothPixmapTransform);
p.rotate(level * 90);
p.drawPixmap(0, 0, start);
p.rotate(-90);
p.drawPixmap(0, 0, end);
break;
case Rect:
int w = start.width();
int h = start.height();
p.drawPixmap(
(int) (w / 2 - w / 2 * level),
(int) (h / 2 - h / 2 * level),
end,
(int) (w / 2 - w / 2 * level),
(int) (h / 2 - h / 2 * level),
(int) (w * level),
(int) (h * level));
p.drawRoundRect(
(int) (w / 2 - w / 2 * level),
(int) (h / 2 - h / 2 * level),
(int) (w * level),
(int) (h * level),
10,
10);
break;
case Flip:
double l = Math.sin(level * Math.PI / 2);
p.eraseRect(rect());
p.setRenderHint(RenderHint.SmoothPixmapTransform);
if (l < 0.5) {
p.translate(0, height() * l);
p.scale(1, 1 - l * 2);
p.drawPixmap(0, 0, start);
} else {
p.translate(0, height() * (1 - l));
p.scale(1, (0.5 - l) * -2);
p.drawPixmap(0, 0, end);
}
break;
case Stuff:
p.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform);
p.fillRect(rect(), palette().brush(backgroundRole()));
int x = (int) ((1 - level) * width());
int h2 = height() / 2;
QTransform t = new QTransform();
t.translate(x, h2);
t.rotate(level * 90, Qt.Axis.YAxis);
p.setTransform(t);
p.drawPixmap(-start.width(), -h2, start);
t = new QTransform();
t.translate(x, h2);
t.rotate((1 - level) * -90, Qt.Axis.YAxis);
p.setTransform(t);
p.drawPixmap(0, -h2, end);
}
}
