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    bezier_item_ = new BezierLine();
9    scene_->addItem(bezier_item_);
10}
11
12CanvasView::~CanvasView(){
13}
14
15void CanvasView::wheelEvent(QWheelEvent* event){
16    QGraphicsView::wheelEvent(event);
17    scene_->update();
18}
19
20void CanvasView::mousePressEvent(QMouseEvent* event){
21    QGraphicsView::mousePressEvent(event);
22
23    QPointF pressed = QGraphicsView::mapToScene(event->pos());
24
25    if (event->button() == Qt::LeftButton) {
26        control_drag_ = true;
27        if(!bezier_item_->selectClosest(pressed))
28            bezier_item_->addPoint(pressed);
29    }
30
31    scene_->update();
32
33}
34
35void CanvasView::mouseReleaseEvent(QMouseEvent* event){
36    QGraphicsView::mouseReleaseEvent(event);
37    if (event->button() == Qt::LeftButton) {
38        control_drag_ = false;
39    }
40}
41
42void CanvasView::mouseMoveEvent(QMouseEvent* event){
43    QGraphicsView::mouseMoveEvent(event);
44    QPointF drag = QGraphicsView::mapToScene(event->pos());
45    if(control_drag_){
46        bezier_item_->updateControlPoint(drag);
47        scene_->update();
48    }
49}
50
51void CanvasView::updateAverageLength(int value){
52    bezier_item_->setAverageStep(value);
53    scene_->update();
54}