135 lines
2.8 KiB
C++
135 lines
2.8 KiB
C++
#include "window.h"
|
|
|
|
#include <private/qguiapplication_p.h>
|
|
|
|
#include <QBackingStore>
|
|
#include <QPainter>
|
|
|
|
static int colorIndexId = 0;
|
|
|
|
QColor colorTable[] =
|
|
{
|
|
QColor("#f09f8f"),
|
|
QColor("#a2bff2"),
|
|
QColor("#c0ef8f")
|
|
};
|
|
|
|
Window::Window(QWindow *parent)
|
|
: QWindow(parent)
|
|
, m_backgroundColorIndex(colorIndexId++)
|
|
{
|
|
setWindowTitle(QLatin1String("Window"));
|
|
|
|
if (parent)
|
|
setGeometry(QRect(160, 120, 320, 240));
|
|
else {
|
|
setGeometry(QRect(10, 10, 640, 480));
|
|
|
|
setSizeIncrement(QSize(10, 10));
|
|
setBaseSize(QSize(640, 480));
|
|
setMinimumSize(QSize(240, 160));
|
|
setMaximumSize(QSize(800, 600));
|
|
}
|
|
|
|
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 Window::mousePressEvent(QMouseEvent *event)
|
|
{
|
|
m_lastPos = event->pos();
|
|
}
|
|
|
|
void Window::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();
|
|
}
|
|
|
|
render();
|
|
}
|
|
|
|
void Window::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);
|
|
}
|
|
|
|
render();
|
|
}
|
|
|
|
void Window::exposeEvent(QExposeEvent *)
|
|
{
|
|
render();
|
|
}
|
|
|
|
void Window::resizeEvent(QResizeEvent *)
|
|
{
|
|
QImage old = m_image;
|
|
|
|
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 Window::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;
|
|
}
|
|
render();
|
|
}
|
|
|
|
void Window::render()
|
|
{
|
|
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);
|
|
}
|
|
|
|
|