SkCanvasWidget.h revision e8fe4bc3efa8f18f5651c5d005fba1935a741be0 
1
2/*
3 * Copyright 2012 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10#ifndef SKCANVASWIDGET_H_
11#define SKCANVASWIDGET_H_
12
13#include <QWidget>
14#include <QHBoxLayout>
15#include "SkStream.h"
16#include "SkRasterWidget.h"
17#include "SkGLWidget.h"
18#include "SkDebugger.h"
19
20class SkCanvasWidget : public QWidget {
21    Q_OBJECT
22
23public:
24    SkCanvasWidget(QWidget* parent, SkDebugger* debugger);
25
26    ~SkCanvasWidget();
27
28    enum WidgetType {
29        kRaster_8888_WidgetType = 1 << 0,
30#if SK_SUPPORT_GPU
31        kGPU_WidgetType         = 1 << 1,
32#endif
33    };
34
35    void drawTo(int index);
36
37    void setWidgetVisibility(WidgetType type, bool isHidden);
38
39    /** Zooms the canvas by scale with the transformation centered at the widget point (px, py). */
40    void zoom(float scale, int px, int py);
41
42    void resetWidgetTransform();
43
44    enum ZoomCommandTypes {
45        kIn_ZoomCommand,
46        kOut_ZoomCommand,
47    };
48public slots:
49    /**
50     *  Zooms in or out (see ZoomCommandTypes) by the standard zoom factor
51     *  with the transformation centered in the middle of the widget.
52     */
53    void zoom(int zoomCommand);
54
55signals:
56    void scaleFactorChanged(float newScaleFactor);
57    void commandChanged(int newCommand);
58    void hitChanged(int hit);
59
60private:
61    QHBoxLayout fHorizontalLayout;
62    SkRasterWidget fRasterWidget;
63#if SK_SUPPORT_GPU
64    SkGLWidget fGLWidget;
65#endif
66    SkDebugger* fDebugger;
67    SkIPoint fPreviousPoint;
68    SkMatrix fUserMatrix;
69
70    void mouseMoveEvent(QMouseEvent* event);
71
72    void mousePressEvent(QMouseEvent* event);
73
74    void mouseDoubleClickEvent(QMouseEvent* event);
75
76    void wheelEvent(QWheelEvent* event);
77
78    void snapWidgetTransform();
79};
80
81
82#endif /* SKCANVASWIDGET_H_ */
83