SkCanvasWidget.h revision e8cc6e8071935339a06548b13a0668b56a7540f5 
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        kGPU_WidgetType         = 1 << 1,
31    };
32
33    void drawTo(int index);
34
35    void setWidgetVisibility(WidgetType type, bool isHidden);
36
37    /** Zooms the canvas by scale with the transformation centered at the widget point (px, py). */
38    void zoom(float scale, int px, int py);
39
40    void resetWidgetTransform();
41
42    enum ZoomCommandTypes {
43        kIn_ZoomCommand,
44        kOut_ZoomCommand,
45    };
46public slots:
47    /**
48     *  Zooms in or out (see ZoomCommandTypes) by the standard zoom factor
49     *  with the transformation centered in the middle of the widget.
50     */
51    void zoom(int zoomCommand);
52
53signals:
54    void scaleFactorChanged(float newScaleFactor);
55    void commandChanged(int newCommand);
56    void hitChanged(int hit);
57
58private:
59    QHBoxLayout fHorizontalLayout;
60    SkRasterWidget fRasterWidget;
61    SkGLWidget fGLWidget;
62    SkDebugger* fDebugger;
63    SkIPoint fPreviousPoint;
64    SkMatrix fUserMatrix;
65
66    void mouseMoveEvent(QMouseEvent* event);
67
68    void mousePressEvent(QMouseEvent* event);
69
70    void mouseDoubleClickEvent(QMouseEvent* event);
71
72    void wheelEvent(QWheelEvent* event);
73
74    void snapWidgetTransform();
75};
76
77
78#endif /* SKCANVASWIDGET_H_ */
79