q_pen_drawer

1#include "q_pen_drawer/canvasview.h"
2
3CanvasView::CanvasView(QWidget* parent): QGraphicsView(parent){
4    scene_ = new QGraphicsScene(parent);
5    QGraphicsView::setScene(scene_);
6    QGraphicsView::setMouseTracking(true);
7}
8
9CanvasView::~CanvasView(){
10}
11
12void CanvasView::wheelEvent(QWheelEvent* event){
13    QGraphicsView::wheelEvent(event);
14    scene_->update();
15}
16
17void CanvasView::mousePressEvent(QMouseEvent* event){
18    QGraphicsView::mousePressEvent(event);
19
20    QPointF pressed = QGraphicsView::mapToScene(event->pos());
21
22    if (event->button() == Qt::LeftButton) {
23        control_drag_ = true;
24    }
25
26    scene_->update();
27
28}
29
30void CanvasView::mouseReleaseEvent(QMouseEvent* event){
31    QGraphicsView::mouseReleaseEvent(event);
32    if (event->button() == Qt::LeftButton) {
33        control_drag_ = false;
34    }
35}
36
37void CanvasView::mouseMoveEvent(QMouseEvent* event){
38    QGraphicsView::mouseMoveEvent(event);
39    QPointF drag = QGraphicsView::mapToScene(event->pos());
40    if(control_drag_){
41        scene_->update();
42    }
43}