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#include "resizable-widget.hpp"
namespace advss {
ResizableWidget::ResizableWidget(QWidget *parent) : QWidget(parent) {}
void ResizableWidget::SetResizingEnabled(bool enable)
{
setMouseTracking(enable);
_customHeight = enable ? sizeHint().height() : 0;
auto pol = sizePolicy();
pol.setVerticalPolicy(enable ? QSizePolicy::Fixed
: QSizePolicy::Preferred);
_resizingEnabled = enable;
}
void ResizableWidget::mousePressEvent(QMouseEvent *event)
{
if (!_resizingEnabled) {
QWidget::mousePressEvent(event);
return;
}
if (IsInResizeArea(event->pos())) {
_resizing = true;
_lastMousePos = event->globalPosition().toPoint();
event->accept();
} else {
QWidget::mousePressEvent(event);
}
}
void ResizableWidget::mouseMoveEvent(QMouseEvent *event)
{
if (!_resizingEnabled) {
QWidget::mouseMoveEvent(event);
return;
}
if (_resizing) {
const int dy = event->globalPosition().toPoint().y() -
_lastMousePos.y();
const int baseHeight = _customHeight == 0 ? height()
: _customHeight;
const int newHeight = baseHeight + dy;
_customHeight =
std::clamp(newHeight, minimumHeight(), maximumHeight());
updateGeometry();
_lastMousePos = event->globalPosition().toPoint();
event->accept();
} else {
setCursor(IsInResizeArea(event->pos()) ? Qt::SizeVerCursor
: Qt::ArrowCursor);
QWidget::mouseMoveEvent(event);
}
}
void ResizableWidget::mouseReleaseEvent(QMouseEvent *event)
{
if (_resizing) {
event->accept();
_resizing = false;
} else {
QWidget::mouseReleaseEvent(event);
}
}
void ResizableWidget::paintEvent(QPaintEvent *event)
{
QWidget::paintEvent(event);
if (!_resizingEnabled) {
return;
}
// Draw a triangle in bottom-right as resize indicator
QPainter painter(this);
QPolygon triangle;
triangle << QPoint(width() - 1, height() - _gripSize)
<< QPoint(width() - _gripSize, height() - 1)
<< QPoint(width() - 1, height() - 1);
painter.setBrush(Qt::gray);
painter.drawPolygon(triangle);
}
QSize ResizableWidget::sizeHint() const
{
if (!_resizingEnabled) {
return QWidget::sizeHint();
}
if (_customHeight == 0) {
return QWidget::sizeHint();
}
return QSize(width(), _customHeight);
}
bool ResizableWidget::IsInResizeArea(const QPoint &pos) const
{
return QRect(width() - _gripSize, height() - _gripSize, _gripSize,
_gripSize)
.contains(pos);
}
} // namespace advss
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