summaryrefslogtreecommitdiffstats
path: root/src/gvcore/imageview.h
blob: 0d9f116a0c132531a53befd8b96b83c0da249b67 (plain)
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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
// vim: set tabstop=4 shiftwidth=4 noexpandtab
/*
Gwenview - A simple image viewer for TDE
Copyright 2000-2004 Aurélien Gâteau

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

*/


#ifndef IMAGEVIEW_H
#define IMAGEVIEW_H

// TQt
#include <tqmap.h>
#include <tqscrollview.h>
#include <tqtimer.h>
#include <tqvaluelist.h>

// Local
#include "busylevelmanager.h"
#include "imageutils/imageutils.h"
#include "libgwenview_export.h"
class TQEvent;
class TQLabel;
class TQMouseEvent;
class TQPainter;
class TQTimer;
class TQWheelEvent;
class KAction;
class KActionCollection;
class KToggleAction;
typedef TQValueList<KAction *> KActionPtrList;

namespace Gwenview {
class Document;

class LIBGWENVIEW_EXPORT ImageView : public TQScrollView {
Q_OBJECT
  

public:
	class ToolBase;
	class ZoomTool;
	class ScrollTool;
	class EventFilter;
#if __GNUC__ < 3
	friend class ToolBase;
	friend class ZoomTool;
	friend class ScrollTool;
#endif
	friend class EventFilter;

	enum ToolID { SCROLL, ZOOM };
	enum ZoomMode { ZOOM_FIT, ZOOM_FIT_WIDTH, ZOOM_FIT_HEIGHT, ZOOM_FREE };
	typedef TQMap<ToolID,ToolBase*> Tools;

	ImageView(TQWidget* parent,Document*,KActionCollection*);
	~ImageView();

	// Properties
	double zoom() const; 
	void setZoom(double zoom, int centerX=-1, int centerY=-1);
	bool fullScreen() const; 
	void setFullScreen(bool);

	int brightness() const;
	int contrast() const;
	int gamma() const;

public slots:
	void setBrightness(int);
	void setContrast(int);
	void setGamma(int);
	void updateFromSettings();

signals:
	void selectPrevious();
	void selectNext();
    void doubleClicked();
	void requestContextMenu(const TQPoint&);

    // Emitted whenever an hint should be displayed
    void requestHintDisplay(const TQString& hint);

	// Emitted whenever brightness, contrast or gamma changes
	void bcgChanged();

protected:
	virtual void contentsDragEnterEvent(TQDragEnterEvent*);
	virtual void contentsDropEvent(TQDropEvent*);
	virtual void keyPressEvent(TQKeyEvent*);
	
private:
	struct Private;
	Private* d;

	struct PendingPaint {
		PendingPaint( bool s, const TQRect& r ) : rect( r ), smooth( s ) {};
		PendingPaint() {}; // stupid TQt containers
		TQRect rect;
		bool smooth;
	};
	enum Operation { CHECK_OPERATIONS = 0, SMOOTH_PASS = 1 << 0 };

	void addPendingPaint( bool smooth, TQRect rect = TQRect());
	void addPendingPaintInternal( bool smooth, TQRect rect = TQRect());
	void performPaint( TQPainter* painter, int clipx, int clipy, int clipw, int cliph, bool smooth );
	void limitPaintSize( PendingPaint& paint );
	void fullRepaint();
	void cancelPending();
	void scheduleOperation( Operation operation );
	void checkPendingOperationsInternal();
	void updateBusyLevels();

	void updateZoom(ZoomMode, double value=0, int centerX=-1, int centerY=-1);
	double computeZoom(bool in) const;
	double computeZoomToFit() const;
	double computeZoomToWidth() const;
	double computeZoomToHeight() const;
	
	void updateImageOffset();
	void updateScrollBarMode();
	void updateContentSize();
	void updateFullScreenLabel();
	void updateZoomActions();
	void selectTool(ButtonState, bool force);
	void restartAutoHideTimer();

	void emitRequestHintDisplay();

	// Used by the scroll tool
	void emitSelectPrevious() { emit selectPrevious(); }
	void emitSelectNext() { emit selectNext(); }

	// Used by the zoom tool
	TQPoint offset() const;
	bool canZoom(bool in) const;
	KToggleAction* zoomToFit() const;

private slots:
	void slotLoaded();
	void slotModified();
	void slotZoomIn();
	void slotZoomOut();
	void slotResetZoom();
	void slotSelectZoom();
	void setZoomToFit(bool);
	void setZoomToWidth(bool);
	void setZoomToHeight(bool);
	void setLockZoom(bool);
	void increaseGamma();
	void decreaseGamma();
	void increaseBrightness();
	void decreaseBrightness();
	void increaseContrast();
	void decreaseContrast();
	void slotImageSizeUpdated();
	void slotImageRectUpdated(const TQRect&);
	void checkPendingOperations();
	void loadingStarted();
	void slotBusyLevelChanged(BusyLevel);
	void showBCGDialog();
	
protected:
	// Overloaded methods
	bool eventFilter(TQObject*, TQEvent*);
	void viewportMousePressEvent(TQMouseEvent*);
	void viewportMouseMoveEvent(TQMouseEvent*);
	void viewportMouseReleaseEvent(TQMouseEvent*);
	bool viewportKeyEvent(TQKeyEvent*); // This one is not inherited, it's called from the eventFilter
	void wheelEvent(TQWheelEvent* event);
	void resizeEvent(TQResizeEvent* event);
	void drawContents(TQPainter* p,int clipx,int clipy,int clipw,int cliph);
};

} // namespace
#endif