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
|
/***************************************************************************
kcolumnsview.h - description
-------------------
begin : Mit Mai 21 2003
copyright : (C) 2003 by Friedrich W. H. Kossebau
email : Friedrich.W.H@Kossebau.de
***************************************************************************/
/***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
***************************************************************************/
#ifndef KHE_KCOLUMNSVIEW_H
#define KHE_KCOLUMNSVIEW_H
// qt specific
#include <tqptrlist.h>
#include <tqwidget.h>
#include <tqpixmap.h>
#include <tqscrollview.h>
// lib specific
#include "kadds.h"
#include "ksection.h" // TODO: think about moving this out of the public API
namespace KHE
{
class KColumn;
class KColumnsViewPrivate;
/** general class for widgets with columns that display different aspects of the same data
* with the same lineheight for all lines
*
*@author Friedrich W. H. Kossebau
*/
class KColumnsView : public QScrollView
{
Q_OBJECT
friend class KColumn;
public:
KColumnsView( /*bool R = false,*/ TQWidget *parent=0, const char *name=0, WFlags Flags=0 );
virtual ~KColumnsView();
public: // drawing
virtual void paintEmptyArea( TQPainter *p, int cx, int cy, int cw, int ch );
virtual void drawContents( TQPainter *p, int cx, int cy, int cw, int ch );
public: // data-wise sizes
/** returns the number of all lines */
int noOfLines() const;
/** returns number of fully visible lines, at least 1 (as needed by page down/up)
* doesn't care about the total height being smaller than the display height
*/
int noOfLinesPerPage() const;
public: // pixel-wise sizes
/** returns the height of each line */
KPixelY lineHeight() const;
/** returns the size of all visible columns together */
TQSize totalViewSize() const;
/** returns the width of all visible columns together */
KPixelX totalWidth() const;
/** returns the height of all lines together */
KPixelY totalHeight() const;
public: // services
/** gives the index of the line that would include y in pixel coord.
* y is not forced to be inside the total height.
*/
uint lineAt( KPixelY y ) const;
/** gives the index of the first and the last line that would be visible
* these lines might not contain anything
*/
KSection visibleLines() const;
/** gives the index of the first and the last line that would be visible in the given pixel range
* these lines might not contain anything
*/
KSection visibleLines( KPixelYs YPixels ) const;
protected:
/** called by KColumn */
void addColumn( KColumn *C );
void removeColumn( KColumn *C );
protected: //
/** sets height of all lines and propagates this information to all columns
* doesn't update the content size
* @param NewLineHeight height in pixels
*/
virtual void setLineHeight( KPixelY NewLineHeight );
/** sets the number of lines
* doesn't update the content size
* @param NewNoOfLines new number of lines to display
*/
virtual void setNoOfLines( int NewNoOfLines );
protected: // recalculations
/** recalculates the positions of the columns and the total width */
void updateWidths();
/** ensures that the line buffer has the size of the whole line */
void updateLineBufferSize();
protected: // painting
void updateView();
void repaintView();
private:
/** hiding it*/
void drawContents( TQPainter* );
protected: // calculated
/** collection of all the columns. All columns will be autodeleted. */
TQPtrList<KColumn> Columns;
/** the number of lines which the column view has */
int NoOfLines;
/** the height of each line in pixels */
KPixelY LineHeight;
/** the width of all visible columns together */
KPixelX TotalWidth;
// /** width that is used by columns that are not resizeable (if shown) */
// KPixelX ReservedWidth;
protected:
// TODO: do we really want this?
bool HorizontalGrid;
/** Buffer where each line is drawn to before it is copied onto the screen */
TQPixmap LineBuffer;
// bool Reversed;
private:
KColumnsViewPrivate *d;
};
inline int KColumnsView::noOfLines() const { return NoOfLines; }
inline KPixelY KColumnsView::lineHeight() const { return LineHeight; }
inline uint KColumnsView::lineAt( KPixelY y ) const { return LineHeight!=0 ? y / LineHeight : 0; }
inline KSection KColumnsView::visibleLines() const
{
KPixelY cy = contentsY();
KPixelY ch = visibleHeight();
return KSection( lineAt(cy), lineAt(cy+ch-1) );
}
inline KSection KColumnsView::visibleLines( KPixelYs YPixels ) const
{
return KSection( lineAt(YPixels.start()), lineAt(YPixels.end()) );
}
inline KPixelY KColumnsView::totalHeight() const { return NoOfLines*LineHeight; }
inline KPixelX KColumnsView::totalWidth() const { return TotalWidth; }
inline TQSize KColumnsView::totalViewSize() const { return TQSize( totalWidth(), totalHeight() ); }
}
#endif
|
