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 *****************************************************************************/
25 #include "ctrl_text.hpp"
26 #include "../events/evt_generic.hpp"
27 #include "../events/evt_mouse.hpp"
28 #include "../src/generic_bitmap.hpp"
29 #include "../src/generic_font.hpp"
30 #include "../src/os_factory.hpp"
31 #include "../src/os_graphics.hpp"
32 #include "../src/os_timer.hpp"
33 #include "../utils/position.hpp"
34 #include "../utils/ustring.hpp"
35 #include "../utils/var_text.hpp"
38 #define MOVING_TEXT_STEP 1
39 #define MOVING_TEXT_DELAY 30
40 #define SEPARATOR_STRING " "
43 CtrlText::CtrlText( intf_thread_t *pIntf, VarText &rVariable,
44 const GenericFont &rFont, const UString &rHelp,
45 uint32_t color, VarBool *pVisible, Scrolling_t scrollMode,
47 CtrlGeneric( pIntf, rHelp, pVisible ), m_fsm( pIntf ),
48 m_rVariable( rVariable ), m_cmdToManual( this ),
49 m_cmdManualMoving( this ), m_cmdManualStill( this ),
50 m_cmdMove( this ), m_pEvt( NULL ), m_rFont( rFont ),
51 m_color( color ), m_scrollMode( scrollMode ), m_alignment( alignment ),
52 m_pImg( NULL ), m_pImgDouble( NULL ),
53 m_pCurrImg( NULL ), m_xPos( 0 ), m_xOffset( 0 ),
54 m_cmdUpdateText( this )
56 m_pTimer = OSFactory::instance( pIntf )->createOSTimer( m_cmdUpdateText );
59 m_fsm.addState( "still" );
60 m_fsm.addState( "moving" );
61 m_fsm.addState( "manual1" );
62 m_fsm.addState( "manual2" );
63 m_fsm.addState( "outStill" );
64 m_fsm.addState( "outMoving" );
67 m_fsm.addTransition( "still", "leave", "outStill" );
68 m_fsm.addTransition( "outStill", "enter", "still" );
69 if( m_scrollMode == kManual )
71 m_fsm.addTransition( "still", "mouse:left:down", "manual1",
73 m_fsm.addTransition( "manual1", "mouse:left:up", "still",
75 m_fsm.addTransition( "manual1", "motion", "manual1", &m_cmdMove );
77 else if( m_scrollMode == kAutomatic )
79 m_fsm.addTransition( "still", "mouse:left:down", "manual1",
81 m_fsm.addTransition( "manual1", "mouse:left:up", "moving",
83 m_fsm.addTransition( "moving", "mouse:left:down", "manual2",
85 m_fsm.addTransition( "manual2", "mouse:left:up", "still",
87 m_fsm.addTransition( "manual1", "motion", "manual1", &m_cmdMove );
88 m_fsm.addTransition( "manual2", "motion", "manual2", &m_cmdMove );
89 m_fsm.addTransition( "moving", "leave", "outMoving" );
90 m_fsm.addTransition( "outMoving", "enter", "moving" );
94 m_fsm.setState( "outStill" );
96 // Observe the variable
97 m_rVariable.addObserver( this );
100 displayText( m_rVariable.get() );
104 CtrlText::~CtrlText()
106 m_rVariable.delObserver( this );
113 void CtrlText::handleEvent( EvtGeneric &rEvent )
115 // Save the event to use it in callbacks
118 m_fsm.handleTransition( rEvent.getAsString() );
122 bool CtrlText::mouseOver( int x, int y ) const
126 // We have 3 different ways of deciding when to return true here:
127 // 1) the mouse is exactly over the text (so if you click between two
128 // letters, the text control doesn't catch the event)
129 // 2) the mouse is over the rectangle of the control
130 // 3) the mouse is over the rectangle of the visible text
131 // I don't know which one is the best...
133 return( x >= 0 && x < getPosition()->getWidth()
134 && m_pCurrImg->hit( x - m_xPos, y ) );
137 return( x >= 0 && x < getPosition()->getWidth()
138 && y >= 0 && y < getPosition()->getHeight() );
141 return( x >= 0 && x < getPosition()->getWidth()
142 && y >= 0 && y < getPosition()->getHeight()
143 && x < m_pCurrImg->getWidth() && x < m_pCurrImg->getHeight() );
153 void CtrlText::draw( OSGraphics &rImage, int xDest, int yDest, int w, int h )
155 rect clip( xDest, yDest, w, h );
156 const Position *pPos = getPosition();
159 // Compute the dimensions to draw
160 int width = min( m_pCurrImg->getWidth() + m_xPos,
161 getPosition()->getWidth() );
162 int height = min( m_pCurrImg->getHeight(), getPosition()->getHeight() );
163 // Draw the current image
164 if( width > 0 && height > 0 )
167 if( m_alignment == kLeft )
169 // We align to the left
172 else if( m_alignment == kRight &&
173 width < getPosition()->getWidth() )
176 // The text is shorter than the width of the control, so we
177 // can align it to the right
178 offset = getPosition()->getWidth() - width;
180 else if( m_alignment == kCenter &&
181 width < getPosition()->getWidth() )
183 // The text is shorter than the width of the control, so we
185 offset = (getPosition()->getWidth() - width) / 2;
187 rect region( pPos->getLeft() + offset,
188 pPos->getTop(), width, height );
190 if( rect::intersect( region, clip, &inter ) )
191 rImage.drawBitmap( *m_pCurrImg, -m_xPos + inter.x - region.x,
194 inter.width, inter.height, true );
200 void CtrlText::setText( const UString &rText, uint32_t color )
203 if( color != 0xFFFFFFFF )
209 m_rVariable.set( rText );
213 void CtrlText::onUpdate( Subject<VarText> &rVariable, void* arg )
217 displayText( m_rVariable.get() );
218 notifyLayout( getPosition()->getWidth(), getPosition()->getHeight() );
223 void CtrlText::onUpdate( Subject<VarBool> &rVariable, void *arg )
225 // Visibility changed
226 if( &rVariable == m_pVisible )
230 displayText( m_rVariable.get() );
231 notifyLayout( getPosition()->getWidth(), getPosition()->getHeight() );
241 void CtrlText::displayText( const UString &rText )
243 // Create the images ('normal' and 'double') from the text
246 m_pImg = m_rFont.drawString( rText, m_color );
252 const UString doubleStringWithSep = rText + SEPARATOR_STRING + rText;
254 m_pImgDouble = m_rFont.drawString( doubleStringWithSep, m_color );
256 // Update the current image used, as if the control size had changed
259 if( m_alignment == kRight && getPosition() &&
260 getPosition()->getWidth() < m_pImg->getWidth() )
262 m_xPos = getPosition()->getWidth() - m_pImg->getWidth();
264 else if( m_alignment == kCenter && getPosition() &&
265 getPosition()->getWidth() < m_pImg->getWidth() )
267 m_xPos = (getPosition()->getWidth() - m_pImg->getWidth()) / 2;
276 // If the control was in the moving state, check if the scrolling is
278 const string &rState = m_fsm.getState();
279 if( rState == "moving" || rState == "outMoving" )
281 if( m_pImg && m_pImg->getWidth() >= getPosition()->getWidth() )
283 m_pCurrImg = m_pImgDouble;
284 m_pTimer->start( MOVING_TEXT_DELAY, false );
295 void CtrlText::onPositionChange()
297 if( m_pImg && getPosition() )
299 if( m_pImg->getWidth() < getPosition()->getWidth() )
303 // When the control becomes wide enough for the text to display,
304 // make sure to stop any scrolling effect
310 m_pCurrImg = m_pImgDouble;
315 // m_pImg is a better default value than m_pImgDouble, but anyway we
316 // don't care because the control is never drawn without position :)
322 void CtrlText::onResize()
328 void CtrlText::CmdToManual::execute()
330 EvtMouse *pEvtMouse = (EvtMouse*)m_pParent->m_pEvt;
332 // Compute the offset
333 m_pParent->m_xOffset = pEvtMouse->getXPos() - m_pParent->m_xPos;
335 m_pParent->m_pTimer->stop();
336 m_pParent->captureMouse();
340 void CtrlText::CmdManualMoving::execute()
342 m_pParent->releaseMouse();
344 // Start the automatic movement, but only if the text is wider than the
345 // control and if the control can scroll (either in manual or automatic
347 if( m_pParent->m_pImg &&
348 m_pParent->m_pImg->getWidth() >= m_pParent->getPosition()->getWidth() )
350 // The current image may have been set incorrectly in displayText(), so
351 // set the correct value
352 m_pParent->m_pCurrImg = m_pParent->m_pImgDouble;
354 m_pParent->m_pTimer->start( MOVING_TEXT_DELAY, false );
359 void CtrlText::CmdManualStill::execute()
361 m_pParent->releaseMouse();
365 void CtrlText::CmdMove::execute()
367 EvtMouse *pEvtMouse = (EvtMouse*)m_pParent->m_pEvt;
369 // Do nothing if the text fits in the control
370 if( m_pParent->m_pImg &&
371 m_pParent->m_pImg->getWidth() >= m_pParent->getPosition()->getWidth() )
373 // The current image may have been set incorrectly in displayText(), so
374 // we set the correct value
375 m_pParent->m_pCurrImg = m_pParent->m_pImgDouble;
377 // Compute the new position of the left side, and make sure it is
378 // in the correct range
379 m_pParent->m_xPos = (pEvtMouse->getXPos() - m_pParent->m_xOffset);
380 m_pParent->adjust( m_pParent->m_xPos );
382 m_pParent->notifyLayout( m_pParent->getPosition()->getWidth(),
383 m_pParent->getPosition()->getHeight() );
388 void CtrlText::CmdUpdateText::execute()
390 m_pParent->m_xPos -= MOVING_TEXT_STEP;
391 m_pParent->adjust( m_pParent->m_xPos );
393 m_pParent->notifyLayout( m_pParent->getPosition()->getWidth(),
394 m_pParent->getPosition()->getHeight() );
398 void CtrlText::adjust( int &position )
400 // {m_pImgDouble->getWidth() - m_pImg->getWidth()} is the period of the
401 // bitmap; remember that the string used to generate m_pImgDouble is of the
402 // form: "foo foo", the number of spaces being a parameter
407 position %= m_pImgDouble->getWidth() - m_pImg->getWidth();
410 position -= m_pImgDouble->getWidth() - m_pImg->getWidth();