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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "qdeclarativecanvas_p.h"
#include "qdeclarativecanvastimer_p.h"
#include "qdeclarativecontext2d_p.h"
#include <qpainter.h>
QT_BEGIN_NAMESPACE
Canvas::Canvas(QQuickPaintedItem *parent)
: QQuickPaintedItem(parent),
m_context(new Context2D(this)),
m_canvasWidth(0),
m_canvasHeight(0),
m_fillMode(Canvas::Stretch),
m_color(Qt::white)
{
}
void Canvas::componentComplete()
{
if (m_canvasWidth == 0 && m_canvasHeight == 0)
m_context->setSize(width(), height());
else
m_context->setSize(m_canvasWidth, m_canvasHeight);
connect(m_context, SIGNAL(changed()), this, SLOT(requestPaint()));
emit init();
QQuickItem::componentComplete();
}
void Canvas::paint(QPainter *painter)
{
m_context->setInPaint(true);
emit paint();
bool oldAA = painter->testRenderHint(QPainter::Antialiasing);
bool oldSmooth = painter->testRenderHint(QPainter::SmoothPixmapTransform);
if (smooth())
painter->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform, smooth());
if (m_context->pixmap().isNull()) {
painter->fillRect(0, 0, width(), height(), m_color);
} else if (width() != m_context->pixmap().width() || height() != m_context->pixmap().height()) {
if (m_fillMode>= Tile) {
if (m_fillMode== Tile) {
painter->drawTiledPixmap(QRectF(0,0,width(),height()), m_context->pixmap());
} else {
qreal widthScale = width() / qreal(m_context->pixmap().width());
qreal heightScale = height() / qreal(m_context->pixmap().height());
QTransform scale;
if (m_fillMode== TileVertically) {
scale.scale(widthScale, 1.0);
QTransform old = painter->transform();
painter->setWorldTransform(scale * old);
painter->drawTiledPixmap(QRectF(0,0,m_context->pixmap().width(),height()), m_context->pixmap());
painter->setWorldTransform(old);
} else {
scale.scale(1.0, heightScale);
QTransform old = painter->transform();
painter->setWorldTransform(scale * old);
painter->drawTiledPixmap(QRectF(0,0,width(),m_context->pixmap().height()), m_context->pixmap());
painter->setWorldTransform(old);
}
}
} else {
qreal widthScale = width() / qreal(m_context->pixmap().width());
qreal heightScale = height() / qreal(m_context->pixmap().height());
QTransform scale;
if (m_fillMode== PreserveAspectFit) {
if (widthScale <= heightScale) {
heightScale = widthScale;
scale.translate(0, (height() - heightScale * m_context->pixmap().height()) / 2);
} else if (heightScale < widthScale) {
widthScale = heightScale;
scale.translate((width() - widthScale * m_context->pixmap().width()) / 2, 0);
}
} else if (m_fillMode== PreserveAspectCrop) {
if (widthScale < heightScale) {
widthScale = heightScale;
scale.translate((width() - widthScale * m_context->pixmap().width()) / 2, 0);
} else if (heightScale < widthScale) {
heightScale = widthScale;
scale.translate(0, (height() - heightScale * m_context->pixmap().height()) / 2);
}
}
if (clip()) {
painter->save();
painter->setClipRect(boundingRect(), Qt::IntersectClip);
}
scale.scale(widthScale, heightScale);
QTransform old = painter->transform();
painter->setWorldTransform(scale * old);
painter->drawPixmap(0, 0, m_context->pixmap());
painter->setWorldTransform(old);
if (clip())
painter->restore();
}
} else {
painter->drawPixmap(0, 0, m_context->pixmap());
}
if (smooth()) {
painter->setRenderHint(QPainter::Antialiasing, oldAA);
painter->setRenderHint(QPainter::SmoothPixmapTransform, oldSmooth);
}
m_context->setInPaint(false);
}
Context2D *Canvas::getContext(const QString &contextId)
{
if (contextId == QLatin1String("2d"))
return m_context;
qDebug("Canvas:requesting unsupported context");
return 0;
}
void Canvas::requestPaint()
{
update();
}
void Canvas::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
if (m_canvasWidth == 0 && m_canvasHeight == 0
&& newGeometry.width() > 0 && newGeometry.height() > 0) {
m_context->setSize(width(), height());
}
QQuickItem::geometryChanged(newGeometry, oldGeometry);
}
void Canvas::setCanvasWidth(int newWidth)
{
if (m_canvasWidth != newWidth) {
m_canvasWidth = newWidth;
m_context->setSize(m_canvasWidth, m_canvasHeight);
emit canvasWidthChanged();
}
}
void Canvas::setCanvasHeight(int newHeight)
{
if (m_canvasHeight != newHeight) {
m_canvasHeight = newHeight;
m_context->setSize(m_canvasWidth, m_canvasHeight);
emit canvasHeightChanged();
}
}
void Canvas::setFillMode(FillMode mode)
{
if (m_fillMode == mode)
return;
m_fillMode = mode;
update();
emit fillModeChanged();
}
QColor Canvas::color()
{
return m_color;
}
void Canvas::setColor(const QColor &color)
{
if (m_color !=color) {
m_color = color;
colorChanged();
}
}
Canvas::FillMode Canvas::fillMode() const
{
return m_fillMode;
}
bool Canvas::save(const QString &filename) const
{
return m_context->pixmap().save(filename);
}
CanvasImage *Canvas::toImage() const
{
return new CanvasImage(m_context->pixmap());
}
void Canvas::setTimeout(const QJSValue &handler, long timeout)
{
if (handler.isCallable())
CanvasTimer::createTimer(this, handler, timeout, true);
}
void Canvas::setInterval(const QJSValue &handler, long interval)
{
if (handler.isCallable())
CanvasTimer::createTimer(this, handler, interval, false);
}
void Canvas::clearTimeout(const QJSValue &handler)
{
CanvasTimer::removeTimer(handler);
}
void Canvas::clearInterval(const QJSValue &handler)
{
CanvasTimer::removeTimer(handler);
}
QT_END_NAMESPACE
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