Add QWidget::update() test.

Test that QWidget::update sends minimal updates, 
both for the rect and region version.

1 files changed, 50 insertions, 1 deletions

diff --git a/tests/manual/repaint/shared/shared.h b/tests/manual/repaint/shared/shared.h
index 3cea95f..6524d48 100644
--- a/tests/manual/repaint/shared/shared.h
+++ b/tests/manual/repaint/shared/shared.h
@@ -46,19 +46,65 @@ class StaticWidget : public QWidget
 Q_OBJECT
 public:
     int hue;
+    bool pressed;
     StaticWidget(QWidget *parent = 0)
     :QWidget(parent)
     {
         setAttribute(Qt::WA_StaticContents);
         setAttribute(Qt::WA_OpaquePaintEvent);
            hue = 200;
+        pressed = false;
     }
 
+    // Update 4 rects in a checkerboard pattern, using either
+    // a QRegion or separate rects (see the useRegion switch)
+    void updatePattern(QPoint pos)
+    {
+        const int rectSize = 10;
+        QRect rect(pos.x() - rectSize, pos.y() - rectSize, rectSize *2, rectSize * 2);
+
+        QVector<QRect> updateRects;
+        updateRects.append(rect.translated(rectSize * 2, rectSize * 2));
+        updateRects.append(rect.translated(rectSize * 2, -rectSize * 2));
+        updateRects.append(rect.translated(-rectSize * 2, rectSize * 2));
+        updateRects.append(rect.translated(-rectSize * 2, -rectSize * 2));
+
+
+        bool useRegion = false;
+        if (useRegion) {
+            QRegion region;
+            region.setRects(updateRects.data(), 4);
+            update(region);
+        } else {
+            foreach (QRect rect, updateRects)
+                update(rect);
+        }
+    }
+
+
     void resizeEvent(QResizeEvent *)
     {
   //      qDebug() << "static widget resize from" << e->oldSize() << "to" << e->size();
     }
 
+    void mousePressEvent(QMouseEvent *event)
+    {
+//        qDebug() << "mousePress at" << event->pos();
+        pressed = true;
+        updatePattern(event->pos());
+    }
+
+    void mouseReleaseEvent(QMouseEvent *)
+    {
+        pressed = false;
+    }
+
+    void mouseMoveEvent(QMouseEvent *event)
+    {
+        if (pressed)
+            updatePattern(event->pos());
+    }
+
     void paintEvent(QPaintEvent *e)
     {
         QPainter p(this);
@@ -66,7 +112,10 @@ public:
         color = (color + 41) % 205 + 50;
 //        color = ((color + 45) %150) + 100;
         qDebug() << "static widget repaint" << e->rect();
-        p.fillRect(e->rect(), QColor::fromHsv(hue, 255, color));
+        if (pressed)
+            p.fillRect(e->rect(), QColor::fromHsv(100, 255, color));
+        else
+            p.fillRect(e->rect(), QColor::fromHsv(hue, 255, color));
         p.setPen(QPen(QColor(Qt::white)));
 
         for (int y = e->rect().top(); y <= e->rect().bottom() + 1; ++y) {