bce32c8ab8
Cleanup the Widgets examples - replace foreach with range-based for loop in mainwindows and painting subdirectories Change-Id: I3c1556dffd22e29dd0a5ba960e699291c496278a Reviewed-by: Konstantin Shegunov <kshegunov@gmail.com> Reviewed-by: Paul Wicking <paul.wicking@qt.io> Reviewed-by: Luca Beldi <v.ronin@yahoo.it> Reviewed-by: Martin Smith <martin.smith@qt.io>
388 lines
12 KiB
C++
388 lines
12 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "arthurwidgets.h"
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#include <QApplication>
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#include <QPainter>
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#include <QPainterPath>
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#include <QPixmapCache>
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#include <QtEvents>
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#include <QTextDocument>
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#include <QAbstractTextDocumentLayout>
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#include <QFile>
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#include <QTextBrowser>
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#include <QBoxLayout>
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#include <QRegularExpression>
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#include <QOffscreenSurface>
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#include <QOpenGLContext>
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#include <QOpenGLPaintDevice>
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#include <QOpenGLWindow>
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extern QPixmap cached(const QString &img);
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ArthurFrame::ArthurFrame(QWidget *parent)
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: QWidget(parent)
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, m_prefer_image(false)
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{
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#if QT_CONFIG(opengl)
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m_glWindow = nullptr;
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m_glWidget = nullptr;
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m_use_opengl = false;
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#endif
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m_document = nullptr;
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m_show_doc = false;
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m_tile = QPixmap(128, 128);
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m_tile.fill(Qt::white);
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QPainter pt(&m_tile);
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QColor color(230, 230, 230);
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pt.fillRect(0, 0, 64, 64, color);
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pt.fillRect(64, 64, 64, 64, color);
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pt.end();
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// QPalette pal = palette();
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// pal.setBrush(backgroundRole(), m_tile);
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// setPalette(pal);
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}
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#if QT_CONFIG(opengl)
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void ArthurFrame::enableOpenGL(bool use_opengl)
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{
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if (m_use_opengl == use_opengl)
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return;
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m_use_opengl = use_opengl;
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if (!m_glWindow && use_opengl) {
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createGlWindow();
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QApplication::postEvent(this, new QResizeEvent(size(), size()));
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}
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if (use_opengl) {
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m_glWidget->show();
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} else {
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if (m_glWidget)
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m_glWidget->hide();
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}
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update();
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}
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void ArthurFrame::createGlWindow()
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{
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Q_ASSERT(m_use_opengl);
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m_glWindow = new QOpenGLWindow();
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QSurfaceFormat f = QSurfaceFormat::defaultFormat();
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f.setSamples(4);
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f.setAlphaBufferSize(8);
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f.setStencilBufferSize(8);
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m_glWindow->setFormat(f);
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m_glWindow->setFlags(Qt::WindowTransparentForInput);
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m_glWindow->resize(width() - 1, height() - 1);
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m_glWindow->create();
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m_glWidget = QWidget::createWindowContainer(m_glWindow, this);
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}
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#endif
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void ArthurFrame::paintEvent(QPaintEvent *e)
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{
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static QImage *static_image = 0;
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QPainter painter;
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if (preferImage()
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#if QT_CONFIG(opengl)
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&& !m_use_opengl
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#endif
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) {
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if (!static_image || static_image->size() != size()) {
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delete static_image;
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static_image = new QImage(size(), QImage::Format_RGB32);
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}
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painter.begin(static_image);
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int o = 10;
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QBrush bg = palette().brush(QPalette::Background);
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painter.fillRect(0, 0, o, o, bg);
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painter.fillRect(width() - o, 0, o, o, bg);
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painter.fillRect(0, height() - o, o, o, bg);
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painter.fillRect(width() - o, height() - o, o, o, bg);
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} else {
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#if QT_CONFIG(opengl)
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if (m_use_opengl && m_glWindow->isValid()) {
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m_glWindow->makeCurrent();
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painter.begin(m_glWindow);
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painter.fillRect(QRectF(0, 0, m_glWindow->width(), m_glWindow->height()), palette().color(backgroundRole()));
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} else {
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painter.begin(this);
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}
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#else
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painter.begin(this);
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#endif
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}
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painter.setClipRect(e->rect());
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painter.setRenderHint(QPainter::Antialiasing);
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QPainterPath clipPath;
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QRect r = rect();
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qreal left = r.x() + 1;
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qreal top = r.y() + 1;
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qreal right = r.right();
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qreal bottom = r.bottom();
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qreal radius2 = 8 * 2;
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clipPath.moveTo(right - radius2, top);
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clipPath.arcTo(right - radius2, top, radius2, radius2, 90, -90);
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clipPath.arcTo(right - radius2, bottom - radius2, radius2, radius2, 0, -90);
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clipPath.arcTo(left, bottom - radius2, radius2, radius2, 270, -90);
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clipPath.arcTo(left, top, radius2, radius2, 180, -90);
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clipPath.closeSubpath();
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painter.save();
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painter.setClipPath(clipPath, Qt::IntersectClip);
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painter.drawTiledPixmap(rect(), m_tile);
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// client painting
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paint(&painter);
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painter.restore();
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painter.save();
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if (m_show_doc)
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paintDescription(&painter);
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painter.restore();
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int level = 180;
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painter.setPen(QPen(QColor(level, level, level), 2));
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painter.setBrush(Qt::NoBrush);
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painter.drawPath(clipPath);
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if (preferImage()
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#if QT_CONFIG(opengl)
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&& !m_use_opengl
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#endif
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) {
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painter.end();
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painter.begin(this);
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painter.drawImage(e->rect(), *static_image, e->rect());
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}
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#if QT_CONFIG(opengl)
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if (m_use_opengl)
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m_glWindow->update();
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#endif
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}
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void ArthurFrame::resizeEvent(QResizeEvent *e)
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{
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#if QT_CONFIG(opengl)
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if (m_glWidget)
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m_glWidget->setGeometry(0, 0, e->size().width()-1, e->size().height()-1);
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#endif
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QWidget::resizeEvent(e);
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}
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void ArthurFrame::setDescriptionEnabled(bool enabled)
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{
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if (m_show_doc != enabled) {
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m_show_doc = enabled;
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emit descriptionEnabledChanged(m_show_doc);
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update();
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}
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}
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void ArthurFrame::loadDescription(const QString &fileName)
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{
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QFile textFile(fileName);
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QString text;
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if (!textFile.open(QFile::ReadOnly))
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text = QString("Unable to load resource file: '%1'").arg(fileName);
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else
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text = textFile.readAll();
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setDescription(text);
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}
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void ArthurFrame::setDescription(const QString &text)
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{
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m_document = new QTextDocument(this);
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m_document->setHtml(text);
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}
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void ArthurFrame::paintDescription(QPainter *painter)
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{
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if (!m_document)
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return;
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int pageWidth = qMax(width() - 100, 100);
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int pageHeight = qMax(height() - 100, 100);
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if (pageWidth != m_document->pageSize().width()) {
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m_document->setPageSize(QSize(pageWidth, pageHeight));
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}
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QRect textRect(width() / 2 - pageWidth / 2,
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height() / 2 - pageHeight / 2,
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pageWidth,
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pageHeight);
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int pad = 10;
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QRect clearRect = textRect.adjusted(-pad, -pad, pad, pad);
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painter->setPen(Qt::NoPen);
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painter->setBrush(QColor(0, 0, 0, 63));
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int shade = 10;
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painter->drawRect(clearRect.x() + clearRect.width() + 1,
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clearRect.y() + shade,
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shade,
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clearRect.height() + 1);
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painter->drawRect(clearRect.x() + shade,
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clearRect.y() + clearRect.height() + 1,
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clearRect.width() - shade + 1,
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shade);
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painter->setRenderHint(QPainter::Antialiasing, false);
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painter->setBrush(QColor(255, 255, 255, 220));
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painter->setPen(Qt::black);
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painter->drawRect(clearRect);
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painter->setClipRegion(textRect, Qt::IntersectClip);
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painter->translate(textRect.topLeft());
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QAbstractTextDocumentLayout::PaintContext ctx;
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QLinearGradient g(0, 0, 0, textRect.height());
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g.setColorAt(0, Qt::black);
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g.setColorAt(0.9, Qt::black);
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g.setColorAt(1, Qt::transparent);
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QPalette pal = palette();
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pal.setBrush(QPalette::Text, g);
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ctx.palette = pal;
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ctx.clip = QRect(0, 0, textRect.width(), textRect.height());
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m_document->documentLayout()->draw(painter, ctx);
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}
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void ArthurFrame::loadSourceFile(const QString &sourceFile)
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{
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m_sourceFileName = sourceFile;
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}
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void ArthurFrame::showSource()
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{
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// Check for existing source
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if (findChild<QTextBrowser *>())
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return;
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QString contents;
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if (m_sourceFileName.isEmpty()) {
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contents = tr("No source for widget: '%1'").arg(objectName());
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} else {
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QFile f(m_sourceFileName);
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if (!f.open(QFile::ReadOnly))
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contents = tr("Could not open file: '%1'").arg(m_sourceFileName);
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else
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contents = f.readAll();
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}
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contents.replace(QLatin1Char('&'), QStringLiteral("&"));
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contents.replace(QLatin1Char('<'), QStringLiteral("<"));
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contents.replace(QLatin1Char('>'), QStringLiteral(">"));
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static const QString keywords[] = {
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QStringLiteral("for "), QStringLiteral("if "),
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QStringLiteral("switch "), QStringLiteral(" int "),
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QStringLiteral("#include "), QStringLiteral("const"),
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QStringLiteral("void "), QStringLiteral("uint "),
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QStringLiteral("case "), QStringLiteral("double "),
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QStringLiteral("#define "), QStringLiteral("static"),
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QStringLiteral("new"), QStringLiteral("this")
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};
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for (const QString &keyword : keywords)
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contents.replace(keyword, QLatin1String("<font color=olive>") + keyword + QLatin1String("</font>"));
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contents.replace(QStringLiteral("(int "), QStringLiteral("(<font color=olive><b>int </b></font>"));
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static const QString ppKeywords[] = {
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QStringLiteral("#ifdef"), QStringLiteral("#ifndef"),
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QStringLiteral("#if"), QStringLiteral("#endif"),
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QStringLiteral("#else")
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};
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for (const QString &keyword : ppKeywords)
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contents.replace(keyword, QLatin1String("<font color=navy>") + keyword + QLatin1String("</font>"));
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contents.replace(QRegularExpression("(\\d\\d?)"), QLatin1String("<font color=navy>\\1</font>"));
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QRegularExpression commentRe("(//.+?)\\n");
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contents.replace(commentRe, QLatin1String("<font color=red>\\1</font>\n"));
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QRegularExpression stringLiteralRe("(\".+?\")");
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contents.replace(stringLiteralRe, QLatin1String("<font color=green>\\1</font>"));
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const QString html = QStringLiteral("<html><pre>") + contents + QStringLiteral("</pre></html>");
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QTextBrowser *sourceViewer = new QTextBrowser(0);
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sourceViewer->setWindowTitle(tr("Source: %1").arg(m_sourceFileName.midRef(5)));
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sourceViewer->setParent(this, Qt::Dialog);
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sourceViewer->setAttribute(Qt::WA_DeleteOnClose);
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sourceViewer->setLineWrapMode(QTextEdit::NoWrap);
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sourceViewer->setHtml(html);
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sourceViewer->resize(600, 600);
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sourceViewer->show();
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}
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