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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/***************************************************************************
kcolumnsview.cpp - 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. *
* *
***************************************************************************/
//#include <kdebug.h>
// qt specific
#include <qpainter.h>
// lib specific
#include "kcolumn.h"
#include "kcolumnsview.h"
using namespace KHE;
static bool DefaultHorizontalGrid = false;
KColumnsView::KColumnsView( /*bool R,*/ QWidget *Parent, const char *Name, WFlags Flags )
: QScrollView( Parent, Name, Flags | WRepaintNoErase /*| WStaticContents*/ ),
NoOfLines( 0 ),
LineHeight( 0 ),
TotalWidth( 0 ),
HorizontalGrid( DefaultHorizontalGrid ),
// Reversed( R ),
d( 0 )
{
viewport()->setBackgroundMode( PaletteBase );
setBackgroundMode( PaletteBackground, PaletteBase );
viewport()->setFocusProxy( this );
Columns.setAutoDelete( true );
}
KColumnsView::~KColumnsView()
{
}
void KColumnsView::setNoOfLines( int NewNoOfLines )
{
NoOfLines = NewNoOfLines;
}
void KColumnsView::setLineHeight( KPixelY LH )
{
LineHeight = LH;
for( KColumn *C=Columns.first(); C; C=Columns.next() )
C->setLineHeight( LineHeight );
verticalScrollBar()->setLineStep( LineHeight );
updateLineBufferSize();
}
void KColumnsView::updateWidths()
{
TotalWidth = 0;
for( KColumn *C=Columns.first(); C; C=Columns.next() )
{
C->setX( TotalWidth );
TotalWidth += C->visibleWidth();
}
updateLineBufferSize();
}
void KColumnsView::updateLineBufferSize()
{
int w = totalWidth();
int h = LineHeight;
if( w != LineBuffer.width() || h != LineBuffer.height() )
LineBuffer.resize( w, h );
}
int KColumnsView::noOfLinesPerPage() const
{
if( !viewport() || LineHeight == 0 )
return 1;
// int NoOfLinesPerPage = (visibleHeight()-1) / LineHeight; // -1 ensures to get always the last visible line
int NoOfLinesPerPage = (viewport()->height()-1) / LineHeight; // -1 ensures to get always the last visible line
if( NoOfLinesPerPage == 0 )
// ensure to move down at least one line
NoOfLinesPerPage = 1;
return NoOfLinesPerPage;
}
void KColumnsView::addColumn( KColumn *C )
{
// if( Reversed )
// Columns.prepend( C );
// else
Columns.append( C );
updateWidths();
}
void KColumnsView::removeColumn( KColumn *C )
{
Columns.remove( C );
updateWidths();
}
void KColumnsView::updateView()
{
resizeContents( totalWidth(), totalHeight() );
updateContents();
}
void KColumnsView::repaintView()
{
resizeContents( totalWidth(), totalHeight() );
repaintContents( false );
}
void KColumnsView::paintEmptyArea( QPainter *P, int cx ,int cy, int cw, int ch)
{
P->fillRect( cx, cy, cw, ch, backgroundBrush() );
}
void KColumnsView::drawContents( QPainter *P, int cx, int cy, int cw, int ch )
{
//kdDebug(1501) << "drawContents(" << cx<<","<<cw<<"#"<<cy<<","<<ch<<")\n";
KPixelXs AffectedXs( cx, cw, true );
// content to be shown?
if( AffectedXs.startsBefore(TotalWidth) )
{
KPixelYs AffectedYs( cy, ch, true );
// collect affected columns
QPtrList<KColumn> RedrawColumns;
for( KColumn *C=Columns.first(); C; C=Columns.next() )
if( C->isVisible() && C->overlaps(AffectedXs) )
RedrawColumns.append( C );
// any lines to be drawn?
if( NoOfLines > 0 )
{
// calculate affected lines
KSection AffectedLines = visibleLines( AffectedYs );
AffectedLines.restrictEndTo( NoOfLines - 1 );
if( AffectedLines.isValid() )
{
QPainter Paint;
Paint.begin( &LineBuffer, this );
// starting painting with the first line
KColumn *C = RedrawColumns.first();
Paint.translate( C->x(), 0 );
for( ; C; C=RedrawColumns.next() )
{
C->paintFirstLine( &Paint, AffectedXs, AffectedLines.start() );
Paint.translate( C->width(), 0 );
}
// Go through the other lines
KPixelY y = AffectedLines.start() * LineHeight;
int l = AffectedLines.start();
while( true )
{
Paint.end();
P->drawPixmap( cx, y, LineBuffer, cx, 0, cw, LineHeight ); // bitBlt directly impossible: lack of real coord
// copy to screen
// bitBlt( viewport(), cx - contentsX(), y - contentsY(),
// &LineBuffer, cx, 0, cw, LineHeight );
++l;
y += LineHeight;
if( l > AffectedLines.end() )
break;
// to avoid flickers we first paint to the linebuffer
Paint.begin( &LineBuffer, this );
KColumn *C = RedrawColumns.first();
Paint.translate( C->x(), 0 );
for( ; C; C=RedrawColumns.next() )
{
C->paintNextLine( &Paint );
Paint.translate( C->width(), 0 );
}
if( HorizontalGrid && cx < TotalWidth )
Paint.drawLine( cx, LineHeight-1, TotalWidth-1, LineHeight-1 ); // TODO: use a additional TotalHeight?
}
}
}
// draw empty columns?
AffectedYs.setStart( totalHeight() );
if( AffectedYs.isValid() )
{
for( KColumn *C = RedrawColumns.first(); C; C=RedrawColumns.next() )
C->paintEmptyColumn( P, AffectedXs, AffectedYs );
}
}
// Paint empty rects
AffectedXs.setStart( TotalWidth );
if( AffectedXs.isValid() )
paintEmptyArea( P, AffectedXs.start(), cy, AffectedXs.width(), ch );
}
// Implemented to get rid of a compiler warning
void KColumnsView::drawContents( QPainter * ) {}
#include "kcolumnsview.moc"
|
