89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
#include "SelectionDialog.h"
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#include "ui_SelectionDialog.h"
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#include <QMouseEvent>
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#include <QPainter>
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#include <QDebug>
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SelectionDialog::SelectionDialog(QWidget *parent) :
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QDialog(parent),
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ui(new Ui::SelectionDialog)
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{
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ui->setupUi(this);
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setWindowFlags (Qt::FramelessWindowHint | Qt::NoDropShadowWindowHint |
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Qt::WindowStaysOnTopHint);
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ui->label->setAutoFillBackground(false);
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ui->label->installEventFilter (this);
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}
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SelectionDialog::~SelectionDialog()
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{
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delete ui;
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}
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bool SelectionDialog::eventFilter(QObject* object, QEvent* event)
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{
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if (object != ui->label)
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{
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return QDialog::eventFilter (object, event);
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}
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if (event->type () == QEvent::MouseButtonPress)
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{
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QMouseEvent* mouseEvent = static_cast <QMouseEvent*> (event);
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if (mouseEvent->button () == Qt::LeftButton)
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{
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startSelectPos_ = mouseEvent->pos ();
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}
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}
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else if (event->type () == QEvent::MouseButtonRelease)
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{
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QMouseEvent* mouseEvent = static_cast <QMouseEvent*> (event);
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if (mouseEvent->button () == Qt::LeftButton)
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{
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if (startSelectPos_.isNull () || currentPixmap_.isNull ())
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{
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QDialog::eventFilter (object, event);
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}
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QPoint endPos = mouseEvent->pos ();
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QRect selection = QRect (startSelectPos_, endPos).normalized ();
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startSelectPos_ = currentSelectPos_ = QPoint ();
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QPixmap selectedPixmap = currentPixmap_.copy (selection);
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emit selected (selectedPixmap);
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accept ();
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}
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}
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else if (event->type () == QEvent::MouseMove)
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{
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QMouseEvent* mouseEvent = static_cast <QMouseEvent*> (event);
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if (mouseEvent->buttons () & Qt::LeftButton)
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{
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currentSelectPos_ = mouseEvent->pos ();
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ui->label->repaint ();
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}
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}
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else if (event->type () == QEvent::Paint)
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{
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QPainter painter (ui->label);
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painter.setPen (Qt::red);
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QRect selection = QRect (startSelectPos_, currentSelectPos_).normalized ();
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painter.drawRect (selection);
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}
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return QDialog::eventFilter (object, event);
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}
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void SelectionDialog::setPixmap(QPixmap pixmap)
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{
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Q_ASSERT (!pixmap.isNull ());
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currentPixmap_ = pixmap;
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QPalette palette = this->palette ();
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palette.setBrush (this->backgroundRole (), pixmap);
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this->setPalette (palette);
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this->resize (pixmap.size ());
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show ();
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setFocus ();
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}
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