38be0d1383
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
648 lines
20 KiB
C++
648 lines
20 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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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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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "pathdeform.h"
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#include <QApplication>
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#include <QtDebug>
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#include <QMouseEvent>
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#include <QTimerEvent>
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#include <QLayout>
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#include <QLineEdit>
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#include <QPainter>
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#include <QSlider>
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#include <QLabel>
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#include <QDesktopWidget>
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#include <qmath.h>
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PathDeformControls::PathDeformControls(QWidget *parent, PathDeformRenderer* renderer, bool smallScreen)
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: QWidget(parent)
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{
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m_renderer = renderer;
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if (smallScreen)
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layoutForSmallScreen();
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else
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layoutForDesktop();
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}
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void PathDeformControls::layoutForDesktop()
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{
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QGroupBox* mainGroup = new QGroupBox(this);
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mainGroup->setTitle(tr("Controls"));
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QGroupBox *radiusGroup = new QGroupBox(mainGroup);
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radiusGroup->setTitle(tr("Lens Radius"));
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QSlider *radiusSlider = new QSlider(Qt::Horizontal, radiusGroup);
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radiusSlider->setRange(15, 150);
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radiusSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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QGroupBox *deformGroup = new QGroupBox(mainGroup);
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deformGroup->setTitle(tr("Deformation"));
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QSlider *deformSlider = new QSlider(Qt::Horizontal, deformGroup);
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deformSlider->setRange(-100, 100);
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deformSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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QGroupBox *fontSizeGroup = new QGroupBox(mainGroup);
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fontSizeGroup->setTitle(tr("Font Size"));
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QSlider *fontSizeSlider = new QSlider(Qt::Horizontal, fontSizeGroup);
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fontSizeSlider->setRange(16, 200);
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fontSizeSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
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QGroupBox *textGroup = new QGroupBox(mainGroup);
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textGroup->setTitle(tr("Text"));
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QLineEdit *textInput = new QLineEdit(textGroup);
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QPushButton *animateButton = new QPushButton(mainGroup);
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animateButton->setText(tr("Animated"));
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animateButton->setCheckable(true);
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QPushButton *showSourceButton = new QPushButton(mainGroup);
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showSourceButton->setText(tr("Show Source"));
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#ifdef QT_OPENGL_SUPPORT
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QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
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enableOpenGLButton->setText(tr("Use OpenGL"));
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enableOpenGLButton->setCheckable(true);
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enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
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if (!QGLFormat::hasOpenGL())
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enableOpenGLButton->hide();
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#endif
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QPushButton *whatsThisButton = new QPushButton(mainGroup);
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whatsThisButton->setText(tr("What's This?"));
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whatsThisButton->setCheckable(true);
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mainGroup->setFixedWidth(180);
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QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
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mainGroupLayout->addWidget(radiusGroup);
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mainGroupLayout->addWidget(deformGroup);
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mainGroupLayout->addWidget(fontSizeGroup);
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mainGroupLayout->addWidget(textGroup);
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mainGroupLayout->addWidget(animateButton);
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mainGroupLayout->addStretch(1);
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#ifdef QT_OPENGL_SUPPORT
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mainGroupLayout->addWidget(enableOpenGLButton);
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#endif
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mainGroupLayout->addWidget(showSourceButton);
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mainGroupLayout->addWidget(whatsThisButton);
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QVBoxLayout *radiusGroupLayout = new QVBoxLayout(radiusGroup);
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radiusGroupLayout->addWidget(radiusSlider);
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QVBoxLayout *deformGroupLayout = new QVBoxLayout(deformGroup);
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deformGroupLayout->addWidget(deformSlider);
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QVBoxLayout *fontSizeGroupLayout = new QVBoxLayout(fontSizeGroup);
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fontSizeGroupLayout->addWidget(fontSizeSlider);
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QVBoxLayout *textGroupLayout = new QVBoxLayout(textGroup);
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textGroupLayout->addWidget(textInput);
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QVBoxLayout * mainLayout = new QVBoxLayout(this);
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mainLayout->addWidget(mainGroup);
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mainLayout->setMargin(0);
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connect(radiusSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setRadius(int)));
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connect(deformSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setIntensity(int)));
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connect(fontSizeSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setFontSize(int)));
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connect(animateButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setAnimated(bool)));
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#ifdef QT_OPENGL_SUPPORT
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connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
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#endif
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connect(textInput, SIGNAL(textChanged(QString)), m_renderer, SLOT(setText(QString)));
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connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)),
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whatsThisButton, SLOT(setChecked(bool)));
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connect(whatsThisButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setDescriptionEnabled(bool)));
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connect(showSourceButton, SIGNAL(clicked()), m_renderer, SLOT(showSource()));
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animateButton->animateClick();
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deformSlider->setValue(80);
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fontSizeSlider->setValue(120);
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radiusSlider->setValue(100);
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textInput->setText(tr("Qt"));
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}
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void PathDeformControls::layoutForSmallScreen()
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{
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QGroupBox* mainGroup = new QGroupBox(this);
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mainGroup->setTitle(tr("Controls"));
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QLabel *radiusLabel = new QLabel(mainGroup);
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radiusLabel->setText(tr("Lens Radius:"));
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QSlider *radiusSlider = new QSlider(Qt::Horizontal, mainGroup);
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radiusSlider->setRange(15, 150);
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radiusSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
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QLabel *deformLabel = new QLabel(mainGroup);
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deformLabel->setText(tr("Deformation:"));
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QSlider *deformSlider = new QSlider(Qt::Horizontal, mainGroup);
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deformSlider->setRange(-100, 100);
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deformSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
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QLabel *fontSizeLabel = new QLabel(mainGroup);
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fontSizeLabel->setText(tr("Font Size:"));
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QSlider *fontSizeSlider = new QSlider(Qt::Horizontal, mainGroup);
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fontSizeSlider->setRange(16, 200);
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fontSizeSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
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QPushButton *animateButton = new QPushButton(tr("Animated"), mainGroup);
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animateButton->setCheckable(true);
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#ifdef QT_OPENGL_SUPPORT
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QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
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enableOpenGLButton->setText(tr("Use OpenGL"));
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enableOpenGLButton->setCheckable(mainGroup);
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enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
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if (!QGLFormat::hasOpenGL())
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enableOpenGLButton->hide();
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#endif
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QPushButton *quitButton = new QPushButton(tr("Quit"), mainGroup);
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QPushButton *okButton = new QPushButton(tr("OK"), mainGroup);
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QGridLayout *mainGroupLayout = new QGridLayout(mainGroup);
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mainGroupLayout->setMargin(0);
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mainGroupLayout->addWidget(radiusLabel, 0, 0, Qt::AlignRight);
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mainGroupLayout->addWidget(radiusSlider, 0, 1);
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mainGroupLayout->addWidget(deformLabel, 1, 0, Qt::AlignRight);
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mainGroupLayout->addWidget(deformSlider, 1, 1);
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mainGroupLayout->addWidget(fontSizeLabel, 2, 0, Qt::AlignRight);
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mainGroupLayout->addWidget(fontSizeSlider, 2, 1);
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mainGroupLayout->addWidget(animateButton, 3,0, 1,2);
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#ifdef QT_OPENGL_SUPPORT
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mainGroupLayout->addWidget(enableOpenGLButton, 4,0, 1,2);
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#endif
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QVBoxLayout *mainLayout = new QVBoxLayout(this);
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mainLayout->addWidget(mainGroup);
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mainLayout->addStretch(1);
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mainLayout->addWidget(okButton);
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mainLayout->addWidget(quitButton);
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connect(quitButton, SIGNAL(clicked()), this, SLOT(emitQuitSignal()));
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connect(okButton, SIGNAL(clicked()), this, SLOT(emitOkSignal()));
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connect(radiusSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setRadius(int)));
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connect(deformSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setIntensity(int)));
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connect(fontSizeSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setFontSize(int)));
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connect(animateButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setAnimated(bool)));
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#ifdef QT_OPENGL_SUPPORT
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connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
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#endif
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animateButton->animateClick();
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deformSlider->setValue(80);
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fontSizeSlider->setValue(120);
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QRect screen_size = QApplication::desktop()->screenGeometry();
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radiusSlider->setValue(qMin(screen_size.width(), screen_size.height())/5);
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m_renderer->setText(tr("Qt"));
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}
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void PathDeformControls::emitQuitSignal()
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{ emit quitPressed(); }
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void PathDeformControls::emitOkSignal()
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{ emit okPressed(); }
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PathDeformWidget::PathDeformWidget(QWidget *parent, bool smallScreen)
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: QWidget(parent)
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{
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setWindowTitle(tr("Vector Deformation"));
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m_renderer = new PathDeformRenderer(this, smallScreen);
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m_renderer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
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// Layouts
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QHBoxLayout *mainLayout = new QHBoxLayout(this);
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mainLayout->addWidget(m_renderer);
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m_controls = new PathDeformControls(0, m_renderer, smallScreen);
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m_controls->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Minimum);
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if (!smallScreen)
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mainLayout->addWidget(m_controls);
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m_renderer->loadSourceFile(":res/deform/pathdeform.cpp");
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m_renderer->loadDescription(":res/deform/pathdeform.html");
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m_renderer->setDescriptionEnabled(false);
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connect(m_renderer, SIGNAL(clicked()), this, SLOT(showControls()));
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connect(m_controls, SIGNAL(okPressed()), this, SLOT(hideControls()));
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connect(m_controls, SIGNAL(quitPressed()), QApplication::instance(), SLOT(quit()));
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}
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void PathDeformWidget::showControls()
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{
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m_controls->showFullScreen();
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}
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void PathDeformWidget::hideControls()
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{
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m_controls->hide();
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}
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void PathDeformWidget::setStyle( QStyle * style )
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{
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QWidget::setStyle(style);
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if (m_controls != 0)
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{
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m_controls->setStyle(style);
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QList<QWidget *> widgets = m_controls->findChildren<QWidget *>();
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foreach (QWidget *w, widgets)
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w->setStyle(style);
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}
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}
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static inline QRect circle_bounds(const QPointF ¢er, qreal radius, qreal compensation)
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{
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return QRect(qRound(center.x() - radius - compensation),
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qRound(center.y() - radius - compensation),
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qRound((radius + compensation) * 2),
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qRound((radius + compensation) * 2));
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}
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const int LENS_EXTENT = 10;
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PathDeformRenderer::PathDeformRenderer(QWidget *widget, bool smallScreen)
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: ArthurFrame(widget)
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{
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m_radius = 100;
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m_pos = QPointF(m_radius, m_radius);
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m_direction = QPointF(1, 1);
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m_fontSize = 24;
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m_animated = true;
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m_repaintTimer.start(25, this);
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m_repaintTracker.start();
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m_intensity = 100;
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m_smallScreen = smallScreen;
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// m_fpsTimer.start(1000, this);
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// m_fpsCounter = 0;
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generateLensPixmap();
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}
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void PathDeformRenderer::setText(const QString &text)
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{
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m_text = text;
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QFont f("times new roman,utopia");
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f.setStyleStrategy(QFont::ForceOutline);
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f.setPointSize(m_fontSize);
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f.setStyleHint(QFont::Times);
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QFontMetrics fm(f);
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m_paths.clear();
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m_pathBounds = QRect();
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QPointF advance(0, 0);
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bool do_quick = true;
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for (int i=0; i<text.size(); ++i) {
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if (text.at(i).unicode() >= 0x4ff && text.at(i).unicode() <= 0x1e00) {
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do_quick = false;
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break;
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}
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}
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if (do_quick) {
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for (int i=0; i<text.size(); ++i) {
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QPainterPath path;
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path.addText(advance, f, text.mid(i, 1));
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m_pathBounds |= path.boundingRect();
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m_paths << path;
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advance += QPointF(fm.width(text.mid(i, 1)), 0);
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}
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} else {
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QPainterPath path;
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path.addText(advance, f, text);
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m_pathBounds |= path.boundingRect();
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m_paths << path;
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}
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for (int i=0; i<m_paths.size(); ++i)
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m_paths[i] = m_paths[i] * QMatrix(1, 0, 0, 1, -m_pathBounds.x(), -m_pathBounds.y());
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update();
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}
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void PathDeformRenderer::generateLensPixmap()
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{
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qreal rad = m_radius + LENS_EXTENT;
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QRect bounds = circle_bounds(QPointF(), rad, 0);
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QPainter painter;
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if (preferImage()) {
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m_lens_image = QImage(bounds.size(), QImage::Format_ARGB32_Premultiplied);
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m_lens_image.fill(0);
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painter.begin(&m_lens_image);
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} else {
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m_lens_pixmap = QPixmap(bounds.size());
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m_lens_pixmap.fill(Qt::transparent);
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painter.begin(&m_lens_pixmap);
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}
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QRadialGradient gr(rad, rad, rad, 3 * rad / 5, 3 * rad / 5);
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gr.setColorAt(0.0, QColor(255, 255, 255, 191));
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gr.setColorAt(0.2, QColor(255, 255, 127, 191));
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gr.setColorAt(0.9, QColor(150, 150, 200, 63));
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gr.setColorAt(0.95, QColor(0, 0, 0, 127));
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gr.setColorAt(1, QColor(0, 0, 0, 0));
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painter.setRenderHint(QPainter::Antialiasing);
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painter.setBrush(gr);
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painter.setPen(Qt::NoPen);
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painter.drawEllipse(0, 0, bounds.width(), bounds.height());
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}
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void PathDeformRenderer::setAnimated(bool animated)
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{
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m_animated = animated;
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if (m_animated) {
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// m_fpsTimer.start(1000, this);
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// m_fpsCounter = 0;
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m_repaintTimer.start(25, this);
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m_repaintTracker.start();
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} else {
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// m_fpsTimer.stop();
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m_repaintTimer.stop();
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}
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}
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void PathDeformRenderer::timerEvent(QTimerEvent *e)
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{
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if (e->timerId() == m_repaintTimer.timerId()) {
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if (QLineF(QPointF(0,0), m_direction).length() > 1)
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m_direction *= 0.995;
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qreal time = m_repaintTracker.restart();
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QRect rectBefore = circle_bounds(m_pos, m_radius, m_fontSize);
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qreal dx = m_direction.x();
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qreal dy = m_direction.y();
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if (time > 0) {
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dx = dx * time * .1;
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dy = dy * time * .1;
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}
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m_pos += QPointF(dx, dy);
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if (m_pos.x() - m_radius < 0) {
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m_direction.setX(-m_direction.x());
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m_pos.setX(m_radius);
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} else if (m_pos.x() + m_radius > width()) {
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m_direction.setX(-m_direction.x());
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m_pos.setX(width() - m_radius);
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}
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if (m_pos.y() - m_radius < 0) {
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m_direction.setY(-m_direction.y());
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m_pos.setY(m_radius);
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} else if (m_pos.y() + m_radius > height()) {
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m_direction.setY(-m_direction.y());
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m_pos.setY(height() - m_radius);
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}
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#ifdef QT_OPENGL_SUPPORT
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if (usesOpenGL()) {
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update();
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} else
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#endif
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{
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QRect rectAfter = circle_bounds(m_pos, m_radius, m_fontSize);
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update(rectAfter | rectBefore);
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QApplication::syncX();
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}
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}
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// else if (e->timerId() == m_fpsTimer.timerId()) {
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// printf("fps: %d\n", m_fpsCounter);
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// emit frameRate(m_fpsCounter);
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// m_fpsCounter = 0;
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|
|
|
// }
|
|
}
|
|
|
|
void PathDeformRenderer::mousePressEvent(QMouseEvent *e)
|
|
{
|
|
setDescriptionEnabled(false);
|
|
|
|
m_repaintTimer.stop();
|
|
m_offset = QPointF();
|
|
if (QLineF(m_pos, e->pos()).length() <= m_radius)
|
|
m_offset = m_pos - e->pos();
|
|
|
|
m_mousePress = e->pos();
|
|
|
|
// If we're not running in small screen mode, always assume we're dragging
|
|
m_mouseDrag = !m_smallScreen;
|
|
|
|
mouseMoveEvent(e);
|
|
}
|
|
|
|
void PathDeformRenderer::mouseReleaseEvent(QMouseEvent *e)
|
|
{
|
|
if (e->buttons() == Qt::NoButton && m_animated) {
|
|
m_repaintTimer.start(10, this);
|
|
m_repaintTracker.start();
|
|
}
|
|
|
|
if (!m_mouseDrag && m_smallScreen)
|
|
emit clicked();
|
|
}
|
|
|
|
void PathDeformRenderer::mouseMoveEvent(QMouseEvent *e)
|
|
{
|
|
if (!m_mouseDrag && (QLineF(m_mousePress, e->pos()).length() > 25.0) )
|
|
m_mouseDrag = true;
|
|
|
|
if (m_mouseDrag) {
|
|
QRect rectBefore = circle_bounds(m_pos, m_radius, m_fontSize);
|
|
if (e->type() == QEvent::MouseMove) {
|
|
QLineF line(m_pos, e->pos() + m_offset);
|
|
line.setLength(line.length() * .1);
|
|
QPointF dir(line.dx(), line.dy());
|
|
m_direction = (m_direction + dir) / 2;
|
|
}
|
|
m_pos = e->pos() + m_offset;
|
|
#ifdef QT_OPENGL_SUPPORT
|
|
if (usesOpenGL()) {
|
|
update();
|
|
} else
|
|
#endif
|
|
{
|
|
QRect rectAfter = circle_bounds(m_pos, m_radius, m_fontSize);
|
|
update(rectBefore | rectAfter);
|
|
}
|
|
}
|
|
}
|
|
|
|
QPainterPath PathDeformRenderer::lensDeform(const QPainterPath &source, const QPointF &offset)
|
|
{
|
|
QPainterPath path;
|
|
path.addPath(source);
|
|
|
|
qreal flip = m_intensity / qreal(100);
|
|
|
|
for (int i=0; i<path.elementCount(); ++i) {
|
|
const QPainterPath::Element &e = path.elementAt(i);
|
|
|
|
qreal x = e.x + offset.x();
|
|
qreal y = e.y + offset.y();
|
|
|
|
qreal dx = x - m_pos.x();
|
|
qreal dy = y - m_pos.y();
|
|
qreal len = m_radius - qSqrt(dx * dx + dy * dy);
|
|
|
|
if (len > 0) {
|
|
path.setElementPositionAt(i,
|
|
x + flip * dx * len / m_radius,
|
|
y + flip * dy * len / m_radius);
|
|
} else {
|
|
path.setElementPositionAt(i, x, y);
|
|
}
|
|
|
|
}
|
|
|
|
return path;
|
|
}
|
|
|
|
|
|
void PathDeformRenderer::paint(QPainter *painter)
|
|
{
|
|
int pad_x = 5;
|
|
int pad_y = 5;
|
|
|
|
int skip_x = qRound(m_pathBounds.width() + pad_x + m_fontSize/2);
|
|
int skip_y = qRound(m_pathBounds.height() + pad_y);
|
|
|
|
painter->setPen(Qt::NoPen);
|
|
painter->setBrush(Qt::black);
|
|
|
|
QRectF clip(painter->clipPath().boundingRect());
|
|
|
|
int overlap = pad_x / 2;
|
|
|
|
for (int start_y=0; start_y < height(); start_y += skip_y) {
|
|
|
|
if (start_y > clip.bottom())
|
|
break;
|
|
|
|
int start_x = -overlap;
|
|
for (; start_x < width(); start_x += skip_x) {
|
|
|
|
if (start_y + skip_y >= clip.top() &&
|
|
start_x + skip_x >= clip.left() &&
|
|
start_x <= clip.right()) {
|
|
for (int i=0; i<m_paths.size(); ++i) {
|
|
QPainterPath path = lensDeform(m_paths[i], QPointF(start_x, start_y));
|
|
painter->drawPath(path);
|
|
}
|
|
}
|
|
}
|
|
overlap = skip_x - (start_x - width());
|
|
|
|
}
|
|
|
|
if (preferImage()) {
|
|
painter->drawImage(m_pos - QPointF(m_radius + LENS_EXTENT, m_radius + LENS_EXTENT),
|
|
m_lens_image);
|
|
} else {
|
|
painter->drawPixmap(m_pos - QPointF(m_radius + LENS_EXTENT, m_radius + LENS_EXTENT),
|
|
m_lens_pixmap);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void PathDeformRenderer::setRadius(int radius)
|
|
{
|
|
qreal max = qMax(m_radius, (qreal)radius);
|
|
m_radius = radius;
|
|
generateLensPixmap();
|
|
if (!m_animated || m_radius < max) {
|
|
#ifdef QT_OPENGL_SUPPORT
|
|
if (usesOpenGL()) {
|
|
update();
|
|
} else
|
|
#endif
|
|
{
|
|
update(circle_bounds(m_pos, max, m_fontSize));
|
|
}
|
|
}
|
|
}
|
|
|
|
void PathDeformRenderer::setIntensity(int intensity)
|
|
{
|
|
m_intensity = intensity;
|
|
if (!m_animated) {
|
|
#ifdef QT_OPENGL_SUPPORT
|
|
if (usesOpenGL()) {
|
|
update();
|
|
} else
|
|
#endif
|
|
{
|
|
update(circle_bounds(m_pos, m_radius, m_fontSize));
|
|
}
|
|
}
|
|
}
|