chalk

kis_gradient_slider_widget.cpp
1/*
2 * Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
3 * 2004 Sven Langkamp <longamp@reallygood.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 */
19
20#include "kis_gradient_slider_widget.h"
21
22#include <tqpainter.h>
23
24#include <kdebug.h>
25#include <tdepopupmenu.h>
26#include <tdelocale.h>
27
28#include "kis_autogradient_resource.h"
29
30#define MARGIN 5
31#define HANDLE_SIZE 10
32
33KisGradientSliderWidget::KisGradientSliderWidget(TQWidget *parent, const char* name, WFlags f )
34 : TQWidget( parent, name, f),
35 m_currentSegment(0),
36 m_selectedSegment(0),
37 m_drag(0)
38{
39 setMinimumHeight(30);
40
41 m_segmentMenu = new TDEPopupMenu();
42 m_segmentMenu->insertItem(i18n("Split Segment"), SPLIT_SEGMENT);
43 m_segmentMenu->insertItem(i18n("Duplicate Segment"), DUPLICATE_SEGMENT);
44 m_segmentMenu->insertItem(i18n("Mirror Segment"), MIRROR_SEGMENT);
45 m_segmentMenu->insertItem(i18n("Remove Segment"), REMOVE_SEGMENT);
46 connect( m_segmentMenu, TQ_SIGNAL( activated(int) ), TQ_SLOT( slotMenuAction(int) ) );
47}
48
49void KisGradientSliderWidget::setGradientResource( KisAutogradientResource* agr)
50{
51 m_autogradientResource = agr;
52 m_selectedSegment = m_autogradientResource->segmentAt(0.0);
53 emit sigSelectedSegment( m_selectedSegment );
54}
55
56void KisGradientSliderWidget::paintEvent ( TQPaintEvent* pe )
57{
58 TQWidget::paintEvent( pe );
59 TQPixmap pixmap( width(), height() );
60 pixmap.fill( colorGroup().background() );
61 TQPainter painter( &pixmap );
62 painter.setPen( TQt::black );
63 painter.drawRect( MARGIN, MARGIN, width() - 2 * MARGIN, height()- 2 * MARGIN - HANDLE_SIZE );
64 if(m_autogradientResource)
65 {
66 TQImage img = m_autogradientResource->generatePreview(width()- 2* MARGIN - 2, height()- 2* MARGIN - HANDLE_SIZE - 2);
67 TQPixmap pixmap(img.width(), img.height());
68 if (!img.isNull()) {
69 m_pixmapIO.putImage(&pixmap, 0, 0, &img);
70 painter.drawPixmap( MARGIN + 1, MARGIN + 1, pixmap, 0, 0, pixmap.width(), pixmap.height());
71 }
72
73 painter.fillRect( MARGIN + 1, height()- MARGIN - HANDLE_SIZE, width() - 2 * MARGIN, HANDLE_SIZE, TQBrush( TQt::white ) );
74 if( m_selectedSegment )
75 {
76 TQRect selection( tqRound( m_selectedSegment->startOffset()*(double)(width()- 2 * MARGIN - 2) ) + 6,
77 height()- HANDLE_SIZE - MARGIN,
78 tqRound( ( m_selectedSegment->endOffset() - m_selectedSegment->startOffset() )*(double)(width()-12) ),
79 HANDLE_SIZE );
80 painter.fillRect( selection, TQBrush( colorGroup().highlight() ) );
81 }
82
83 TQPointArray triangle(3);
84 TQValueVector<double> handlePositions = m_autogradientResource->getHandlePositions();
85 int position;
86 painter.setBrush( TQBrush( TQt::black) );
87 for (uint i = 0; i < handlePositions.count(); i++)
88 {
89 position = tqRound( handlePositions[i] * (double)( width()-12) ) + 6;
90 triangle[0] = TQPoint(position, height() - HANDLE_SIZE - MARGIN );
91 triangle[1] = TQPoint(position + (HANDLE_SIZE / 2 - 1), height() - MARGIN );
92 triangle[2] = TQPoint(position - (HANDLE_SIZE / 2 - 1), height() - MARGIN );
93 painter.drawPolygon(triangle);
94 }
95 painter.setBrush( TQBrush( TQt::white ) );
96 TQValueVector<double> middleHandlePositions = m_autogradientResource->getMiddleHandlePositions();
97 for (uint i = 0; i < middleHandlePositions.count(); i++)
98 {
99 position = tqRound( middleHandlePositions[i] * (double)(width()-12) ) + 6;
100 triangle[0] = TQPoint(position, height()-HANDLE_SIZE - MARGIN);
101 triangle[1] = TQPoint(position + (HANDLE_SIZE / 2 - 2), height() - MARGIN);
102 triangle[2] = TQPoint(position - (HANDLE_SIZE / 2 - 2), height() - MARGIN);
103 painter.drawPolygon(triangle);
104 }
105 }
106 bitBlt( this, 0, 0, &pixmap, 0, 0, pixmap.width(), pixmap.height(), TQt::CopyROP);
107}
108
109void KisGradientSliderWidget::mousePressEvent( TQMouseEvent * e )
110{
111 TQWidget::mousePressEvent( e );
112 if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) || e-> button() != TQt::LeftButton )
113 return;
114 double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
115 KisGradientSegment* segment = 0;
116 segment = m_autogradientResource->segmentAt(t);
117 if(segment != 0)
118 {
119 m_currentSegment = segment;
120 TQRect leftHandle( tqRound(m_currentSegment->startOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
121 height() - HANDLE_SIZE,
122 HANDLE_SIZE - 1,
123 HANDLE_SIZE);
124 TQRect middleHandle( tqRound(m_currentSegment->middleOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 -2) ),
125 height() - HANDLE_SIZE - MARGIN,
126 HANDLE_SIZE - 1,
127 HANDLE_SIZE);
128 TQRect rightHandle( tqRound(m_currentSegment->endOffset() * (double)(width()-2*MARGIN-2)+ MARGIN - (HANDLE_SIZE/2 - 1 )),
129 height() - HANDLE_SIZE,
130 HANDLE_SIZE - 1,
131 HANDLE_SIZE);
132 // Change the activation order of the handles to avoid deadlocks
133 if( t > 0.5 )
134 {
135 if( leftHandle.contains( e->pos() ) )
136 m_drag = LEFT_DRAG;
137 else if( middleHandle.contains( e->pos() ) )
138 m_drag = MIDDLE_DRAG;
139 else if( rightHandle.contains( e->pos() ) )
140 m_drag = RIGHT_DRAG;
141 }
142 else
143 {
144 if( rightHandle.contains( e->pos() ) )
145 m_drag = RIGHT_DRAG;
146 else if( middleHandle.contains( e->pos() ) )
147 m_drag = MIDDLE_DRAG;
148 else if( leftHandle.contains( e->pos() ) )
149 m_drag = LEFT_DRAG;
150 }
151
152 if( m_drag == NO_DRAG )
153 {
154 m_selectedSegment = m_currentSegment;
155 emit sigSelectedSegment( m_selectedSegment );
156 }
157 }
158 repaint(false);
159}
160
161void KisGradientSliderWidget::mouseReleaseEvent ( TQMouseEvent * e )
162{
163 TQWidget::mouseReleaseEvent( e );
164 m_drag = NO_DRAG;
165}
166
167void KisGradientSliderWidget::mouseMoveEvent( TQMouseEvent * e )
168{
169 TQWidget::mouseMoveEvent( e );
170 if( ( e->y() < MARGIN || e->y() > height() - MARGIN ) || ( e->x() < MARGIN || e->x() > width() - MARGIN ) )
171 return;
172 double t = (double)(e->x() - MARGIN) / (double)(width() - 2 * MARGIN);
173 switch( m_drag )
174 {
175 case RIGHT_DRAG:
176 m_autogradientResource->moveSegmentEndOffset( m_currentSegment, t );
177 break;
178 case LEFT_DRAG:
179 m_autogradientResource->moveSegmentStartOffset( m_currentSegment, t );
180 break;
181 case MIDDLE_DRAG:
182 m_autogradientResource->moveSegmentMiddleOffset( m_currentSegment, t );
183 break;
184 }
185
186 if ( m_drag != NO_DRAG)
187 emit sigChangedSegment( m_currentSegment );
188
189 repaint(false);
190}
191
192void KisGradientSliderWidget::contextMenuEvent( TQContextMenuEvent * e )
193{
194 m_segmentMenu->setItemEnabled( REMOVE_SEGMENT, m_autogradientResource->removeSegmentPossible() );
195 m_segmentMenu->popup( e->globalPos());
196}
197
198void KisGradientSliderWidget::slotMenuAction( int id )
199{
200 switch( id )
201 {
202 case SPLIT_SEGMENT:
203 m_autogradientResource->splitSegment( m_selectedSegment );
204 break;
205 case DUPLICATE_SEGMENT:
206 m_autogradientResource->duplicateSegment( m_selectedSegment );
207 break;
208 case MIRROR_SEGMENT:
209 m_autogradientResource->mirrorSegment( m_selectedSegment );
210 break;
211 case REMOVE_SEGMENT:
212 m_selectedSegment = m_autogradientResource->removeSegment( m_selectedSegment );
213 break;
214 }
215 emit sigSelectedSegment( m_selectedSegment );
216 repaint(false);
217}
218
219#include "kis_gradient_slider_widget.moc"