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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "rasterwindow.h"
//#include <private/qguiapplication_p.h>
#include <QBackingStore>
#include <QPainter>
#include <QtWidgets>
static int colorIndexId = 0;
QColor colorTable[] =
{
QColor("#f09f8f"),
QColor("#a2bff2"),
QColor("#c0ef8f")
};
RasterWindow::RasterWindow(QRasterWindow *parent)
: QRasterWindow(parent)
, m_backgroundColorIndex(colorIndexId++)
{
initialize();
}
void RasterWindow::initialize()
{
create();
m_backingStore = new QBackingStore(this);
m_image = QImage(geometry().size(), QImage::Format_RGB32);
m_image.fill(colorTable[m_backgroundColorIndex % (sizeof(colorTable) / sizeof(colorTable[0]))].rgba());
m_lastPos = QPoint(-1, -1);
}
void RasterWindow::mousePressEvent(QMouseEvent *event)
{
m_lastPos = event->pos();
unsetCursor();
}
void RasterWindow::mouseMoveEvent(QMouseEvent *event)
{
if (m_lastPos != QPoint(-1, -1)) {
QPainter p(&m_image);
p.setRenderHint(QPainter::Antialiasing);
p.drawLine(m_lastPos, event->pos());
m_lastPos = event->pos();
}
scheduleRender();
}
void RasterWindow::mouseReleaseEvent(QMouseEvent *event)
{
if (m_lastPos != QPoint(-1, -1)) {
QPainter p(&m_image);
p.setRenderHint(QPainter::Antialiasing);
p.drawLine(m_lastPos, event->pos());
m_lastPos = QPoint(-1, -1);
}
scheduleRender();
}
void RasterWindow::exposeEvent(QExposeEvent *)
{
render();
}
void RasterWindow::resizeEvent(QResizeEvent *)
{
QImage old = m_image;
//qDebug() << "RasterWindow::resizeEvent" << width << height;
int width = qMax(geometry().width(), old.width());
int height = qMax(geometry().height(), old.height());
if (width > old.width() || height > old.height()) {
m_image = QImage(width, height, QImage::Format_RGB32);
m_image.fill(colorTable[(m_backgroundColorIndex) % (sizeof(colorTable) / sizeof(colorTable[0]))].rgba());
QPainter p(&m_image);
p.drawImage(0, 0, old);
}
render();
}
void RasterWindow::keyPressEvent(QKeyEvent *event)
{
switch (event->key()) {
case Qt::Key_Backspace:
m_text.chop(1);
break;
case Qt::Key_Enter:
case Qt::Key_Return:
m_text.append('\n');
break;
default:
m_text.append(event->text());
break;
}
scheduleRender();
}
void RasterWindow::scheduleRender()
{
requestUpdate();
}
bool RasterWindow::event(QEvent *e)
{
if (e->type() == QEvent::UpdateRequest)
render();
return QWindow::event(e);
}
void RasterWindow::render()
{
if (!isExposed()) {
qDebug() << "Skipping render, not exposed";
return;
}
QRect rect(QPoint(), geometry().size());
m_backingStore->resize(rect.size());
m_backingStore->beginPaint(rect);
QPaintDevice *device = m_backingStore->paintDevice();
QPainter p(device);
p.drawImage(0, 0, m_image);
QFont font;
font.setPixelSize(32);
p.setFont(font);
p.drawText(rect, 0, m_text);
m_backingStore->endPaint();
m_backingStore->flush(rect);
}
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