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multiwindow: React to mouse press to allow debugging UI responsiveness

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The animated FPS counter should be enough to observe smooth animations,
so we use the color of the window to visualize frame latency.

Change-Id: I1171a1c4bdc261ca8655771290c6735357821781
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
This commit is contained in:
Tor Arne Vestbø 2016-08-25 13:09:27 +02:00 committed by Tor Arne Vestbø
parent bcbc8120b3
commit 6ce96fdbf5
1 changed files with 20 additions and 33 deletions
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53
tests/manual/qopenglwindow/multiwindow/main.cpp
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@ -31,14 +31,7 @@
**
****************************************************************************/
#include <QGuiApplication>
#include <QOpenGLWindow>
#include <QOpenGLContext>
#include <QOpenGLFunctions>
#include <QPainter>
#include <QElapsedTimer>
#include <QCommandLineParser>
#include <QScreen>
#include <QtGui>
const char applicationDescription[] = "\n\
This application opens multiple windows and continuously schedules updates for\n\
@ -67,40 +60,26 @@ class Window : public QOpenGLWindow
{
Q_OBJECT
public:
Window(int n) : idx(n) {
r = g = b = fps = 0;
y = 0;
Window(int index) : windowNumber(index + 1), y(0), fps(0) {
color = QColor::fromHsl((index * 30) % 360, 255, 127).toRgb();
resize(200, 200);
setObjectName(QString("Window %1").arg(windowNumber));
connect(this, SIGNAL(frameSwapped()), SLOT(frameSwapped()));
fpsTimer.start();
}
void paintGL() {
QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
f->glClearColor(r, g, b, 1);
f->glClearColor(color.redF(), color.greenF(), color.blueF(), 1);
f->glClear(GL_COLOR_BUFFER_BIT);
switch (idx % 3) {
case 0:
r += 0.005f;
break;
case 1:
g += 0.005f;
break;
case 2:
b += 0.005f;
break;
}
if (r > 1)
r = 0;
if (g > 1)
g = 0;
if (b > 1)
b = 0;
QPainter p(this);
p.setPen(Qt::white);
p.drawText(QPoint(20, y), QString(QLatin1String("Window %1 (%2 FPS)")).arg(idx).arg(fps));
p.drawText(QPoint(20, y), QString(QLatin1String("Window %1 (%2 FPS)")).arg(windowNumber).arg(fps));
y += 1;
if (y > height() - 20)
y = 20;
@ -118,9 +97,17 @@ public slots:
}
}
protected:
void mousePressEvent(QMouseEvent *event) {
qDebug() << this << event;
color.setHsl((color.hue() + 90) % 360, color.saturation(), color.lightness());
color = color.toRgb();
}
private:
int idx;
GLfloat r, g, b;
int windowNumber;
QColor color;
int y;
int framesSwapped;
@ -163,7 +150,7 @@ int main(int argc, char **argv)
int numberOfWindows = qMax(parser.value(numWindowsOption).toInt(), 1);
QList<QWindow *> windows;
for (int i = 0; i < numberOfWindows; ++i) {
Window *w = new Window(i + 1);
Window *w = new Window(i);
windows << w;
if (i == 0 && parser.isSet(vsyncOneOption)) {