nodeeditor2/include/QtNodes/internal/GraphicsView.hpp at fc6b396a43658fbdccf63094399146362c90b39f · fabns-nano/nodeeditor2 · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
#pragma once

#include <QtWidgets/QGraphicsView>

#include "Definitions.hpp"
#include "Export.hpp"

class QLineEdit;

namespace QtNodes {

class BasicGraphicsScene;

/**
 * @brief A central view able to render objects from `BasicGraphicsScene`.
 */
class NODE_EDITOR_PUBLIC GraphicsView : public QGraphicsView
{
    Q_OBJECT
public:
    struct ScaleRange
    {
        double minimum = 0;
        double maximum = 0;
    };

public:
    GraphicsView(QWidget *parent = Q_NULLPTR);
    GraphicsView(BasicGraphicsScene *scene, QWidget *parent = Q_NULLPTR);

    GraphicsView(const GraphicsView &) = delete;
    GraphicsView operator=(const GraphicsView &) = delete;

    QAction *clearSelectionAction() const;

    QAction *deleteSelectionAction() const;

    void setScene(BasicGraphicsScene *scene);

    void centerScene();

    /// @brief max=0/min=0 indicates infinite zoom in/out
    void setScaleRange(double minimum = 0, double maximum = 0);

    void setScaleRange(ScaleRange range);

    double getScale() const;

public Q_SLOTS:
    void scaleUp();

    void scaleDown();

    void setupScale(double scale);

    virtual void onDeleteSelectedObjects();

    virtual void onDuplicateSelectedObjects();

    virtual void onCopySelectedObjects();

    virtual void onPasteObjects();

    void zoomFitAll();

    void zoomFitSelected();

Q_SIGNALS:
    void scaleChanged(double scale);

protected:
    void contextMenuEvent(QContextMenuEvent *event) override;

    void wheelEvent(QWheelEvent *event) override;

    void keyPressEvent(QKeyEvent *event) override;

    void keyReleaseEvent(QKeyEvent *event) override;

    void mousePressEvent(QMouseEvent *event) override;

    void mouseMoveEvent(QMouseEvent *event) override;

    void drawBackground(QPainter *painter, const QRectF &r) override;

    void showEvent(QShowEvent *event) override;

protected:
    BasicGraphicsScene *nodeScene();

    /// Computes scene position for pasting the copied/duplicated node groups.
    QPointF scenePastePosition();

private:
    QAction *_clearSelectionAction = nullptr;
    QAction *_deleteSelectionAction = nullptr;
    QAction *_cutSelectionAction = nullptr;
    QAction *_duplicateSelectionAction = nullptr;
    QAction *_copySelectionAction = nullptr;
    QAction *_pasteAction = nullptr;

    QPointF _clickPos;
    ScaleRange _scaleRange;

    QLineEdit *_labelEdit = nullptr;
    NodeId _editingNodeId = InvalidNodeId;
};
} // namespace QtNodes