c0738f9ff0
The Q_FOREACH is in a header, so we need to port away from it,
otherwise it makes any TU that includes it (in PCH builds: all)
incompatible with QT_NO_FOREACH.
This is a trivial case of marking the local constructor const, but go
a step further and replace the QList with a C array ("never use a
dynamically-sized container for statically-sized data"). Both
consumers of the container (after s/foreach/for/) can deal with array.
Pick-to: 6.6 6.5
Task-number: QTBUG-115839
Change-Id: I142e438dcf2d785bb34022a3fb1ff46b8eaa0edd
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include <QWidget>
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#include <QPainter>
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#include <QMouseEvent>
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#include <QDebug>
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class StaticWidget : public QWidget
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{
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Q_OBJECT
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public:
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int hue;
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bool pressed;
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StaticWidget(QWidget *parent = nullptr)
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:QWidget(parent)
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{
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setAttribute(Qt::WA_StaticContents);
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setAttribute(Qt::WA_OpaquePaintEvent);
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hue = 200;
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pressed = false;
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}
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// Update 4 rects in a checkerboard pattern, using either
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// a QRegion or separate rects (see the useRegion switch)
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void updatePattern(QPoint pos)
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{
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const int rectSize = 10;
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QRect rect(pos.x() - rectSize, pos.y() - rectSize, rectSize *2, rectSize * 2);
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const QRect updateRects[] = {
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rect.translated(rectSize * 2, rectSize * 2),
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rect.translated(rectSize * 2, -rectSize * 2),
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rect.translated(-rectSize * 2, rectSize * 2),
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rect.translated(-rectSize * 2, -rectSize * 2),
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};
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bool useRegion = false;
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if (useRegion) {
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QRegion region;
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region.setRects(updateRects, 4);
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update(region);
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} else {
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for (QRect rect : updateRects)
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update(rect);
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}
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}
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void resizeEvent(QResizeEvent *)
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{
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// qDebug() << "static widget resize from" << e->oldSize() << "to" << e->size();
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}
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void mousePressEvent(QMouseEvent *event)
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{
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// qDebug() << "mousePress at" << event->pos();
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pressed = true;
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updatePattern(event->pos());
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}
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void mouseReleaseEvent(QMouseEvent *)
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{
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pressed = false;
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}
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void mouseMoveEvent(QMouseEvent *event)
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{
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if (pressed)
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updatePattern(event->pos());
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}
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void paintEvent(QPaintEvent *e)
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{
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QPainter p(this);
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static int color = 200;
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color = (color + 41) % 205 + 50;
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// color = ((color + 45) %150) + 100;
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qDebug() << "static widget repaint" << e->rect();
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if (pressed)
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p.fillRect(e->rect(), QColor::fromHsv(100, 255, color));
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else
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p.fillRect(e->rect(), QColor::fromHsv(hue, 255, color));
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p.setPen(QPen(QColor(Qt::white)));
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for (int y = e->rect().top(); y <= e->rect().bottom() + 1; ++y) {
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if (y % 20 == 0)
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p.drawLine(e->rect().left(), y, e->rect().right(), y);
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}
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for (int x = e->rect().left(); x <= e->rect().right() +1 ; ++x) {
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if (x % 20 == 0)
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p.drawLine(x, e->rect().top(), x, e->rect().bottom());
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}
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}
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};
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