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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <svx/zoomsliderctrl.hxx>
21 : #include <vcl/status.hxx>
22 : #include <vcl/menu.hxx>
23 : #include <vcl/image.hxx>
24 : #include <vcl/svapp.hxx>
25 : #include <svx/zoomslideritem.hxx>
26 : #include <svx/dialmgr.hxx>
27 : #include <svx/dialogs.hrc>
28 :
29 : #include <basegfx/tools/zoomtools.hxx>
30 :
31 : #include <set>
32 :
33 : // -----------------------------------------------------------------------
34 :
35 18 : SFX_IMPL_STATUSBAR_CONTROL( SvxZoomSliderControl, SvxZoomSliderItem );
36 :
37 : // -----------------------------------------------------------------------
38 :
39 0 : struct SvxZoomSliderControl::SvxZoomSliderControl_Impl
40 : {
41 : sal_uInt16 mnCurrentZoom;
42 : sal_uInt16 mnMinZoom;
43 : sal_uInt16 mnMaxZoom;
44 : sal_uInt16 mnSliderCenter;
45 : std::vector< long > maSnappingPointOffsets;
46 : std::vector< sal_uInt16 > maSnappingPointZooms;
47 : Image maSliderButton;
48 : Image maIncreaseButton;
49 : Image maDecreaseButton;
50 : bool mbValuesSet;
51 : bool mbOmitPaint;
52 :
53 0 : SvxZoomSliderControl_Impl() :
54 : mnCurrentZoom( 0 ),
55 : mnMinZoom( 0 ),
56 : mnMaxZoom( 0 ),
57 : mnSliderCenter( 0 ),
58 : maSnappingPointOffsets(),
59 : maSnappingPointZooms(),
60 : maSliderButton(),
61 : maIncreaseButton(),
62 : maDecreaseButton(),
63 : mbValuesSet( false ),
64 0 : mbOmitPaint( false ) {}
65 : };
66 :
67 : // -----------------------------------------------------------------------
68 :
69 : const long nButtonWidth = 10;
70 : const long nButtonHeight = 10;
71 : const long nIncDecWidth = 10;
72 : const long nIncDecHeight = 10;
73 : const long nSliderHeight = 2;
74 : const long nSnappingHeight = 4;
75 : const long nSliderXOffset = 20;
76 : const long nSnappingEpsilon = 5; // snapping epsilon in pixels
77 : const long nSnappingPointsMinDist = nSnappingEpsilon; // minimum distance of two adjacent snapping points
78 :
79 : // -----------------------------------------------------------------------
80 :
81 : // nOffset referes to the origin of the control:
82 : // + ----------- -
83 0 : sal_uInt16 SvxZoomSliderControl::Offset2Zoom( long nOffset ) const
84 : {
85 0 : const long nControlWidth = getControlRect().GetWidth();
86 0 : sal_uInt16 nRet = 0;
87 :
88 0 : if ( nOffset < nSliderXOffset )
89 0 : return mpImpl->mnMinZoom;
90 :
91 0 : if ( nOffset > nControlWidth - nSliderXOffset )
92 0 : return mpImpl->mnMaxZoom;
93 :
94 : // check for snapping points:
95 0 : sal_uInt16 nCount = 0;
96 0 : std::vector< long >::iterator aSnappingPointIter;
97 0 : for ( aSnappingPointIter = mpImpl->maSnappingPointOffsets.begin();
98 0 : aSnappingPointIter != mpImpl->maSnappingPointOffsets.end();
99 : ++aSnappingPointIter )
100 : {
101 0 : const long nCurrent = *aSnappingPointIter;
102 0 : if ( Abs(nCurrent - nOffset) < nSnappingEpsilon )
103 : {
104 0 : nOffset = nCurrent;
105 0 : nRet = mpImpl->maSnappingPointZooms[ nCount ];
106 0 : break;
107 : }
108 0 : ++nCount;
109 : }
110 :
111 0 : if ( 0 == nRet )
112 : {
113 0 : if ( nOffset < nControlWidth / 2 )
114 : {
115 : // first half of slider
116 0 : const long nFirstHalfRange = mpImpl->mnSliderCenter - mpImpl->mnMinZoom;
117 0 : const long nHalfSliderWidth = nControlWidth/2 - nSliderXOffset;
118 0 : const long nZoomPerSliderPixel = (1000 * nFirstHalfRange) / nHalfSliderWidth;
119 0 : const long nOffsetToSliderLeft = nOffset - nSliderXOffset;
120 0 : nRet = mpImpl->mnMinZoom + sal_uInt16( nOffsetToSliderLeft * nZoomPerSliderPixel / 1000 );
121 : }
122 : else
123 : {
124 : // second half of slider
125 0 : const long nSecondHalfRange = mpImpl->mnMaxZoom - mpImpl->mnSliderCenter;
126 0 : const long nHalfSliderWidth = nControlWidth/2 - nSliderXOffset;
127 0 : const long nZoomPerSliderPixel = 1000 * nSecondHalfRange / nHalfSliderWidth;
128 0 : const long nOffsetToSliderCenter = nOffset - nControlWidth/2;
129 0 : nRet = mpImpl->mnSliderCenter + sal_uInt16( nOffsetToSliderCenter * nZoomPerSliderPixel / 1000 );
130 : }
131 : }
132 :
133 0 : if ( nRet < mpImpl->mnMinZoom )
134 0 : nRet = mpImpl->mnMinZoom;
135 0 : else if ( nRet > mpImpl->mnMaxZoom )
136 0 : nRet = mpImpl->mnMaxZoom;
137 :
138 0 : return nRet;
139 : }
140 :
141 : // returns the offset to the left control border
142 0 : long SvxZoomSliderControl::Zoom2Offset( sal_uInt16 nCurrentZoom ) const
143 : {
144 0 : const long nControlWidth = getControlRect().GetWidth();
145 0 : long nRet = nSliderXOffset;
146 :
147 0 : const long nHalfSliderWidth = nControlWidth/2 - nSliderXOffset;
148 :
149 0 : if ( nCurrentZoom <= mpImpl->mnSliderCenter )
150 : {
151 0 : nCurrentZoom = nCurrentZoom - mpImpl->mnMinZoom;
152 0 : const long nFirstHalfRange = mpImpl->mnSliderCenter - mpImpl->mnMinZoom;
153 0 : const long nSliderPixelPerZoomPercent = 1000 * nHalfSliderWidth / nFirstHalfRange;
154 0 : const long nOffset = (nSliderPixelPerZoomPercent * nCurrentZoom) / 1000;
155 0 : nRet += nOffset;
156 : }
157 : else
158 : {
159 0 : nCurrentZoom = nCurrentZoom - mpImpl->mnSliderCenter;
160 0 : const long nSecondHalfRange = mpImpl->mnMaxZoom - mpImpl->mnSliderCenter;
161 0 : const long nSliderPixelPerZoomPercent = 1000 * nHalfSliderWidth / nSecondHalfRange;
162 0 : const long nOffset = (nSliderPixelPerZoomPercent * nCurrentZoom) / 1000;
163 0 : nRet += nHalfSliderWidth + nOffset;
164 : }
165 :
166 0 : return nRet;
167 : }
168 :
169 : // -----------------------------------------------------------------------
170 :
171 0 : SvxZoomSliderControl::SvxZoomSliderControl( sal_uInt16 _nSlotId, sal_uInt16 _nId, StatusBar& _rStb ) :
172 : SfxStatusBarControl( _nSlotId, _nId, _rStb ),
173 0 : mpImpl( new SvxZoomSliderControl_Impl )
174 : {
175 0 : mpImpl->maSliderButton = Image( SVX_RES( RID_SVXBMP_SLIDERBUTTON ) );
176 0 : mpImpl->maIncreaseButton = Image( SVX_RES( RID_SVXBMP_SLIDERINCREASE ) );
177 0 : mpImpl->maDecreaseButton = Image( SVX_RES( RID_SVXBMP_SLIDERDECREASE ) );
178 0 : }
179 :
180 : // -----------------------------------------------------------------------
181 :
182 0 : SvxZoomSliderControl::~SvxZoomSliderControl()
183 : {
184 0 : delete mpImpl;
185 0 : }
186 :
187 : // -----------------------------------------------------------------------
188 :
189 0 : void SvxZoomSliderControl::StateChanged( sal_uInt16 /*nSID*/, SfxItemState eState, const SfxPoolItem* pState )
190 : {
191 0 : if ( (SFX_ITEM_AVAILABLE != eState) || pState->ISA( SfxVoidItem ) )
192 : {
193 0 : GetStatusBar().SetItemText( GetId(), String() );
194 0 : mpImpl->mbValuesSet = false;
195 : }
196 : else
197 : {
198 : OSL_ENSURE( pState->ISA( SvxZoomSliderItem ), "invalid item type: should be a SvxZoomSliderItem" );
199 0 : mpImpl->mnCurrentZoom = static_cast<const SvxZoomSliderItem*>( pState )->GetValue();
200 0 : mpImpl->mnMinZoom = static_cast<const SvxZoomSliderItem*>( pState )->GetMinZoom();
201 0 : mpImpl->mnMaxZoom = static_cast<const SvxZoomSliderItem*>( pState )->GetMaxZoom();
202 0 : mpImpl->mnSliderCenter= 100;
203 0 : mpImpl->mbValuesSet = true;
204 :
205 0 : if ( mpImpl->mnSliderCenter == mpImpl->mnMaxZoom )
206 0 : mpImpl->mnSliderCenter = mpImpl->mnMinZoom + (sal_uInt16)((mpImpl->mnMaxZoom - mpImpl->mnMinZoom) * 0.5);
207 :
208 :
209 : DBG_ASSERT( mpImpl->mnMinZoom <= mpImpl->mnCurrentZoom &&
210 : mpImpl->mnMinZoom < mpImpl->mnSliderCenter &&
211 : mpImpl->mnMaxZoom >= mpImpl->mnCurrentZoom &&
212 : mpImpl->mnMaxZoom > mpImpl->mnSliderCenter,
213 : "Looks like the zoom slider item is corrupted" );
214 :
215 0 : const com::sun::star::uno::Sequence < sal_Int32 > rSnappingPoints = static_cast<const SvxZoomSliderItem*>( pState )->GetSnappingPoints();
216 0 : mpImpl->maSnappingPointOffsets.clear();
217 0 : mpImpl->maSnappingPointZooms.clear();
218 :
219 : // get all snapping points:
220 0 : std::set< sal_uInt16 > aTmpSnappingPoints;
221 0 : for ( sal_uInt16 j = 0; j < rSnappingPoints.getLength(); ++j )
222 : {
223 0 : const sal_Int32 nSnappingPoint = rSnappingPoints[j];
224 0 : aTmpSnappingPoints.insert( (sal_uInt16)nSnappingPoint );
225 : }
226 :
227 : // remove snapping points that are to close to each other:
228 0 : std::set< sal_uInt16 >::iterator aSnappingPointIter;
229 0 : long nLastOffset = 0;
230 :
231 0 : for ( aSnappingPointIter = aTmpSnappingPoints.begin(); aSnappingPointIter != aTmpSnappingPoints.end(); ++aSnappingPointIter )
232 : {
233 0 : const sal_uInt16 nCurrent = *aSnappingPointIter;
234 0 : const long nCurrentOffset = Zoom2Offset( nCurrent );
235 :
236 0 : if ( nCurrentOffset - nLastOffset >= nSnappingPointsMinDist )
237 : {
238 0 : mpImpl->maSnappingPointOffsets.push_back( nCurrentOffset );
239 0 : mpImpl->maSnappingPointZooms.push_back( nCurrent );
240 0 : nLastOffset = nCurrentOffset;
241 : }
242 0 : }
243 : }
244 :
245 0 : if ( !mpImpl->mbOmitPaint && GetStatusBar().AreItemsVisible() )
246 0 : GetStatusBar().SetItemData( GetId(), 0 ); // force repaint
247 0 : }
248 :
249 : // -----------------------------------------------------------------------
250 :
251 0 : void SvxZoomSliderControl::Paint( const UserDrawEvent& rUsrEvt )
252 : {
253 0 : if ( !mpImpl->mbValuesSet || mpImpl->mbOmitPaint )
254 0 : return;
255 :
256 0 : const Rectangle aControlRect = getControlRect();
257 0 : OutputDevice* pDev = rUsrEvt.GetDevice();
258 0 : Rectangle aRect = rUsrEvt.GetRect();
259 0 : Rectangle aSlider = aRect;
260 :
261 0 : aSlider.Top() += (aControlRect.GetHeight() - nSliderHeight)/2;
262 0 : aSlider.Bottom() = aSlider.Top() + nSliderHeight - 1;
263 0 : aSlider.Left() += nSliderXOffset;
264 0 : aSlider.Right() -= nSliderXOffset;
265 :
266 0 : Color aOldLineColor = pDev->GetLineColor();
267 0 : Color aOldFillColor = pDev->GetFillColor();
268 :
269 0 : const StyleSettings& rStyleSettings = Application::GetSettings().GetStyleSettings();
270 0 : pDev->SetLineColor( rStyleSettings.GetShadowColor() );
271 0 : pDev->SetFillColor( rStyleSettings.GetShadowColor() );
272 :
273 : // draw snapping points:
274 0 : std::vector< long >::iterator aSnappingPointIter;
275 0 : for ( aSnappingPointIter = mpImpl->maSnappingPointOffsets.begin();
276 0 : aSnappingPointIter != mpImpl->maSnappingPointOffsets.end();
277 : ++aSnappingPointIter )
278 : {
279 0 : long nSnapPosX = aRect.Left() + *aSnappingPointIter;
280 :
281 0 : pDev->DrawRect( Rectangle( nSnapPosX - 1, aSlider.Top() - nSnappingHeight,
282 0 : nSnapPosX, aSlider.Bottom() + nSnappingHeight ) );
283 : }
284 :
285 : // draw slider
286 0 : pDev->DrawRect( aSlider );
287 :
288 : // draw slider button
289 0 : Point aImagePoint = aRect.TopLeft();
290 0 : aImagePoint.X() += Zoom2Offset( mpImpl->mnCurrentZoom );
291 0 : aImagePoint.X() -= nButtonWidth/2;
292 0 : aImagePoint.Y() += (aControlRect.GetHeight() - nButtonHeight)/2;
293 0 : pDev->DrawImage( aImagePoint, mpImpl->maSliderButton );
294 :
295 : // draw decrease button
296 0 : aImagePoint = aRect.TopLeft();
297 0 : aImagePoint.X() += (nSliderXOffset - nIncDecWidth)/2;
298 0 : aImagePoint.Y() += (aControlRect.GetHeight() - nIncDecHeight)/2;
299 0 : pDev->DrawImage( aImagePoint, mpImpl->maDecreaseButton );
300 :
301 : // draw increase button
302 0 : aImagePoint.X() = aRect.TopLeft().X() + aControlRect.GetWidth() - nIncDecWidth - (nSliderXOffset - nIncDecWidth)/2;
303 0 : pDev->DrawImage( aImagePoint, mpImpl->maIncreaseButton );
304 :
305 0 : pDev->SetLineColor( aOldLineColor );
306 0 : pDev->SetFillColor( aOldFillColor );
307 : }
308 :
309 : // -----------------------------------------------------------------------
310 :
311 0 : sal_Bool SvxZoomSliderControl::MouseButtonDown( const MouseEvent & rEvt )
312 : {
313 0 : if ( !mpImpl->mbValuesSet )
314 0 : return sal_True;
315 :
316 0 : const Rectangle aControlRect = getControlRect();
317 0 : const Point aPoint = rEvt.GetPosPixel();
318 0 : const sal_Int32 nXDiff = aPoint.X() - aControlRect.Left();
319 :
320 0 : const long nButtonLeftOffset = (nSliderXOffset - nIncDecWidth)/2;
321 0 : const long nButtonRightOffset = (nSliderXOffset + nIncDecWidth)/2;
322 :
323 0 : const long nOldZoom = mpImpl->mnCurrentZoom;
324 :
325 : // click to - button
326 0 : if ( nXDiff >= nButtonLeftOffset && nXDiff <= nButtonRightOffset )
327 0 : mpImpl->mnCurrentZoom = basegfx::zoomtools::zoomOut( static_cast<int>(mpImpl->mnCurrentZoom) );
328 : // click to + button
329 0 : else if ( nXDiff >= aControlRect.GetWidth() - nSliderXOffset + nButtonLeftOffset &&
330 0 : nXDiff <= aControlRect.GetWidth() - nSliderXOffset + nButtonRightOffset )
331 0 : mpImpl->mnCurrentZoom = basegfx::zoomtools::zoomIn( static_cast<int>(mpImpl->mnCurrentZoom) );
332 : // click to slider
333 0 : else if( nXDiff >= nSliderXOffset && nXDiff <= aControlRect.GetWidth() - nSliderXOffset )
334 0 : mpImpl->mnCurrentZoom = Offset2Zoom( nXDiff );
335 :
336 0 : if ( mpImpl->mnCurrentZoom < mpImpl->mnMinZoom )
337 0 : mpImpl->mnCurrentZoom = mpImpl->mnMinZoom;
338 0 : else if ( mpImpl->mnCurrentZoom > mpImpl->mnMaxZoom )
339 0 : mpImpl->mnCurrentZoom = mpImpl->mnMaxZoom;
340 :
341 0 : if ( nOldZoom == mpImpl->mnCurrentZoom )
342 0 : return sal_True;
343 :
344 0 : if ( GetStatusBar().AreItemsVisible() )
345 0 : GetStatusBar().SetItemData( GetId(), 0 ); // force repaint
346 :
347 0 : mpImpl->mbOmitPaint = true; // optimization: paint before executing command,
348 : // then omit painting which is triggered by the execute function
349 :
350 0 : SvxZoomSliderItem aZoomSliderItem( mpImpl->mnCurrentZoom );
351 :
352 0 : ::com::sun::star::uno::Any a;
353 0 : aZoomSliderItem.QueryValue( a );
354 :
355 0 : ::com::sun::star::uno::Sequence< ::com::sun::star::beans::PropertyValue > aArgs( 1 );
356 0 : aArgs[0].Name = rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "ZoomSlider" ));
357 0 : aArgs[0].Value = a;
358 :
359 0 : execute( aArgs );
360 :
361 0 : mpImpl->mbOmitPaint = false;
362 :
363 0 : return sal_True;
364 : }
365 :
366 : // -----------------------------------------------------------------------
367 :
368 0 : sal_Bool SvxZoomSliderControl::MouseMove( const MouseEvent & rEvt )
369 : {
370 0 : if ( !mpImpl->mbValuesSet )
371 0 : return sal_True;
372 :
373 0 : const short nButtons = rEvt.GetButtons();
374 :
375 : // check mouse move with button pressed
376 0 : if ( 1 == nButtons )
377 : {
378 0 : const Rectangle aControlRect = getControlRect();
379 0 : const Point aPoint = rEvt.GetPosPixel();
380 0 : const sal_Int32 nXDiff = aPoint.X() - aControlRect.Left();
381 :
382 0 : if ( nXDiff >= nSliderXOffset && nXDiff <= aControlRect.GetWidth() - nSliderXOffset )
383 : {
384 0 : mpImpl->mnCurrentZoom = Offset2Zoom( nXDiff );
385 :
386 0 : if ( GetStatusBar().AreItemsVisible() )
387 0 : GetStatusBar().SetItemData( GetId(), 0 ); // force repaint
388 :
389 0 : mpImpl->mbOmitPaint = true; // optimization: paint before executing command,
390 : // then omit painting which is triggered by the execute function
391 :
392 : // commit state change
393 0 : SvxZoomSliderItem aZoomSliderItem( mpImpl->mnCurrentZoom );
394 :
395 0 : ::com::sun::star::uno::Any a;
396 0 : aZoomSliderItem.QueryValue( a );
397 :
398 0 : ::com::sun::star::uno::Sequence< ::com::sun::star::beans::PropertyValue > aArgs( 1 );
399 0 : aArgs[0].Name = rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "ZoomSlider" ));
400 0 : aArgs[0].Value = a;
401 :
402 0 : execute( aArgs );
403 :
404 0 : mpImpl->mbOmitPaint = false;
405 : }
406 : }
407 :
408 0 : return sal_True;
409 : }
410 :
411 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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