1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2003 the VideoLAN team
7 * Authors: Cyril Deguet <asmax@via.ecp.fr>
8 * Olivier Teulière <ipkiss@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
26 #include "ctrl_list.hpp"
27 #include "../src/os_factory.hpp"
28 #include "../src/os_graphics.hpp"
29 #include "../src/generic_bitmap.hpp"
30 #include "../src/generic_font.hpp"
31 #include "../src/scaled_bitmap.hpp"
32 #include "../utils/position.hpp"
33 #include "../utils/ustring.hpp"
34 #include "../events/evt_key.hpp"
35 #include "../events/evt_mouse.hpp"
36 #include "../events/evt_scroll.hpp"
39 #define SCROLL_STEP 0.05f
40 #define LINE_INTERVAL 1 // Number of pixels inserted between 2 lines
43 CtrlList::CtrlList( intf_thread_t *pIntf, VarList &rList,
44 const GenericFont &rFont, const GenericBitmap *pBitmap,
45 uint32_t fgColor, uint32_t playColor, uint32_t bgColor1,
46 uint32_t bgColor2, uint32_t selColor,
47 const UString &rHelp, VarBool *pVisible ):
48 CtrlGeneric( pIntf, rHelp, pVisible ), m_rList( rList ), m_rFont( rFont ),
49 m_pBitmap( pBitmap ), m_fgColor( fgColor ), m_playColor( playColor ),
50 m_bgColor1( bgColor1 ), m_bgColor2( bgColor2 ), m_selColor( selColor ),
51 m_pLastSelected( NULL ), m_pImage( NULL ), m_lastPos( 0 )
53 // Observe the list and position variables
54 m_rList.addObserver( this );
55 m_rList.getPositionVar().addObserver( this );
63 m_rList.getPositionVar().delObserver( this );
64 m_rList.delObserver( this );
69 void CtrlList::onUpdate( Subject<VarList> &rList, void *arg )
72 m_pLastSelected = NULL;
76 void CtrlList::onUpdate( Subject<VarPercent> &rPercent, void *arg )
78 // Get the size of the control
79 const Position *pPos = getPosition();
83 int height = pPos->getHeight();
85 // How many lines can be displayed ?
86 int itemHeight = m_rFont.getSize() + LINE_INTERVAL;
87 int maxItems = height / itemHeight;
89 // Determine what is the first item to display
90 VarPercent &rVarPos = m_rList.getPositionVar();
92 int excessItems = m_rList.size() - maxItems;
95 // a simple (int)(...) causes rounding errors !
99 firstItem = lrint( (1.0 - rVarPos.get()) * (double)excessItems );
101 if( m_lastPos != firstItem )
103 // Redraw the control if the position has changed
104 m_lastPos = firstItem;
111 void CtrlList::onResize()
113 // Get the size of the control
114 const Position *pPos = getPosition();
118 int height = pPos->getHeight();
120 // How many lines can be displayed ?
121 int itemHeight = m_rFont.getSize() + LINE_INTERVAL;
122 int maxItems = height / itemHeight;
124 // Update the position variable
125 VarPercent &rVarPos = m_rList.getPositionVar();
126 int excessItems = m_rList.size() - maxItems;
127 if( excessItems > 0 )
129 double newVal = 1.0 - (double)m_lastPos / excessItems;
132 // Change the position to keep the same first displayed item
133 rVarPos.set( 1.0 - (double)m_lastPos / excessItems );
137 // We cannot keep the current first item
138 m_lastPos = excessItems;
146 void CtrlList::onPositionChange()
152 void CtrlList::handleEvent( EvtGeneric &rEvent )
154 if( rEvent.getAsString().find( "key:down" ) != string::npos )
156 int key = ((EvtKey&)rEvent).getKey();
157 VarList::Iterator it = m_rList.begin();
158 bool previousWasSelected = false;
159 while( it != m_rList.end() )
161 VarList::Iterator next = it;
165 // Scroll up one item
166 if( it != m_rList.begin() || &*it != m_pLastSelected )
168 bool nextWasSelected = ( &*next == m_pLastSelected );
169 (*it).m_selected = nextWasSelected;
170 if( nextWasSelected )
172 m_pLastSelected = &*it;
176 else if( key == KEY_DOWN )
178 // Scroll down one item
179 if( next != m_rList.end() || &*it != m_pLastSelected )
181 (*it).m_selected = previousWasSelected;
183 if( previousWasSelected )
185 m_pLastSelected = &*it;
186 previousWasSelected = false;
190 previousWasSelected = ( &*it == m_pLastSelected );
196 // Redraw the control
201 else if( rEvent.getAsString().find( "mouse:left" ) != string::npos )
203 EvtMouse &rEvtMouse = (EvtMouse&)rEvent;
204 const Position *pos = getPosition();
205 int yPos = m_lastPos + ( rEvtMouse.getYPos() - pos->getTop() ) /
206 (m_rFont.getSize() + LINE_INTERVAL);
207 VarList::Iterator it;
210 if( rEvent.getAsString().find( "mouse:left:down:ctrl,shift" ) !=
213 // Flag to know if the current item must be selected
215 for( it = m_rList.begin(); it != m_rList.end(); it++ )
217 bool nextSelect = select;
218 if( index == yPos || &*it == m_pLastSelected )
230 (*it).m_selected = (*it).m_selected || select;
236 else if( rEvent.getAsString().find( "mouse:left:down:ctrl" ) !=
239 for( it = m_rList.begin(); it != m_rList.end(); it++ )
243 (*it).m_selected = ! (*it).m_selected;
244 m_pLastSelected = &*it;
251 else if( rEvent.getAsString().find( "mouse:left:down:shift" ) !=
254 // Flag to know if the current item must be selected
256 for( it = m_rList.begin(); it != m_rList.end(); it++ )
258 bool nextSelect = select;
259 if( index == yPos || &*it == m_pLastSelected )
271 (*it).m_selected = select;
277 else if( rEvent.getAsString().find( "mouse:left:down" ) !=
280 for( it = m_rList.begin(); it != m_rList.end(); it++ )
284 (*it).m_selected = true;
285 m_pLastSelected = &*it;
289 (*it).m_selected = false;
295 else if( rEvent.getAsString().find( "mouse:left:dblclick" ) !=
298 for( it = m_rList.begin(); it != m_rList.end(); it++ )
302 (*it).m_selected = true;
303 m_pLastSelected = &*it;
304 // Execute the action associated to this item
305 m_rList.action( &*it );
309 (*it).m_selected = false;
315 // Redraw the control
320 else if( rEvent.getAsString().find( "scroll" ) != string::npos )
322 int direction = ((EvtScroll&)rEvent).getDirection();
324 double percentage = m_rList.getPositionVar().get();
325 double step = 2.0 / (double)m_rList.size();
326 if( direction == EvtScroll::kUp )
334 m_rList.getPositionVar().set( percentage );
339 bool CtrlList::mouseOver( int x, int y ) const
341 const Position *pPos = getPosition();
344 int width = pPos->getWidth();
345 int height = pPos->getHeight();
346 return ( x >= 0 && x <= width && y >= 0 && y <= height );
352 void CtrlList::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h )
354 const Position *pPos = getPosition();
355 rect region( pPos->getLeft(), pPos->getTop(),
356 pPos->getWidth(), pPos->getHeight() );
357 rect clip( xDest, yDest, w, h );
359 if( rect::intersect( region, clip, &inter ) && m_pImage )
361 rImage.drawGraphics( *m_pImage,
362 inter.x - pPos->getLeft(),
363 inter.y - pPos->getTop(),
364 inter.x, inter.y, inter.width, inter.height );
369 void CtrlList::autoScroll()
371 // Get the size of the control
372 const Position *pPos = getPosition();
377 int height = pPos->getHeight();
379 // How many lines can be displayed ?
380 int itemHeight = m_rFont.getSize() + LINE_INTERVAL;
381 int maxItems = height / itemHeight;
383 // Find the current playing stream
385 VarList::ConstIterator it;
386 for( it = m_rList.begin(); it != m_rList.end(); it++ )
388 if( (*it).m_playing )
394 if( it != m_rList.end() &&
395 ( playIndex < m_lastPos || playIndex >= m_lastPos + maxItems ) )
397 // Scroll the list to have the playing stream visible
398 VarPercent &rVarPos = m_rList.getPositionVar();
399 rVarPos.set( 1.0 - (float)playIndex / (float)m_rList.size() );
400 // The image will be changed by onUpdate(VarPercent&)
410 void CtrlList::makeImage()
414 // Get the size of the control
415 const Position *pPos = getPosition();
420 int width = pPos->getWidth();
421 int height = pPos->getHeight();
422 int itemHeight = m_rFont.getSize() + LINE_INTERVAL;
425 OSFactory *pOsFactory = OSFactory::instance( getIntf() );
426 m_pImage = pOsFactory->createOSGraphics( width, height );
428 VarList::ConstIterator it = m_rList[m_lastPos];
430 // Draw the background
433 // A background bitmap is given, so we scale it, ignoring the
435 ScaledBitmap bmp( getIntf(), *m_pBitmap, width, height );
436 m_pImage->drawBitmap( bmp, 0, 0 );
438 // Take care of the selection color
439 for( int yPos = 0; yPos < height; yPos += itemHeight )
441 int rectHeight = __MIN( itemHeight, height - yPos );
442 if( it != m_rList.end() )
444 if( (*it).m_selected )
446 m_pImage->fillRect( 0, yPos, width, rectHeight,
455 // No background bitmap, so use the 2 background colors
456 // Current background color
457 uint32_t bgColor = m_bgColor1;
458 for( int yPos = 0; yPos < height; yPos += itemHeight )
460 int rectHeight = __MIN( itemHeight, height - yPos );
461 if( it != m_rList.end() )
463 uint32_t color = ( (*it).m_selected ? m_selColor : bgColor );
464 m_pImage->fillRect( 0, yPos, width, rectHeight, color );
469 m_pImage->fillRect( 0, yPos, width, rectHeight, bgColor );
471 // Flip the background color
472 bgColor = ( bgColor == m_bgColor1 ? m_bgColor2 : m_bgColor1 );
478 for( it = m_rList[m_lastPos]; it != m_rList.end() && yPos < height; it++ )
480 UString *pStr = (UString*)(it->m_cString.get());
481 uint32_t color = ( it->m_playing ? m_playColor : m_fgColor );
484 GenericBitmap *pText = m_rFont.drawString( *pStr, color, width );
489 yPos += itemHeight - pText->getHeight();
496 int lineHeight = __MIN( pText->getHeight() - ySrc, height - yPos );
497 m_pImage->drawBitmap( *pText, 0, ySrc, 0, yPos, pText->getWidth(),
499 yPos += (pText->getHeight() - ySrc );