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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 <vcl/settings.hxx>
26 : #include <svx/zoomslideritem.hxx>
27 : #include <svx/dialmgr.hxx>
28 : #include <svx/dialogs.hrc>
29 : #include <basegfx/tools/zoomtools.hxx>
30 :
31 : #include <set>
32 :
33 1688 : SFX_IMPL_STATUSBAR_CONTROL( SvxZoomSliderControl, SvxZoomSliderItem );
34 :
35 1464 : struct SvxZoomSliderControl::SvxZoomSliderControl_Impl
36 : {
37 : sal_uInt16 mnCurrentZoom;
38 : sal_uInt16 mnMinZoom;
39 : sal_uInt16 mnMaxZoom;
40 : sal_uInt16 mnSliderCenter;
41 : std::vector< long > maSnappingPointOffsets;
42 : std::vector< sal_uInt16 > maSnappingPointZooms;
43 : Image maSliderButton;
44 : Image maIncreaseButton;
45 : Image maDecreaseButton;
46 : bool mbValuesSet;
47 : bool mbOmitPaint;
48 :
49 1464 : SvxZoomSliderControl_Impl() :
50 : mnCurrentZoom( 0 ),
51 : mnMinZoom( 0 ),
52 : mnMaxZoom( 0 ),
53 : mnSliderCenter( 0 ),
54 : maSnappingPointOffsets(),
55 : maSnappingPointZooms(),
56 : maSliderButton(),
57 : maIncreaseButton(),
58 : maDecreaseButton(),
59 : mbValuesSet( false ),
60 1464 : mbOmitPaint( false ) {}
61 : };
62 :
63 : const long nSliderXOffset = 20;
64 : const long nSnappingEpsilon = 5; // snapping epsilon in pixels
65 : const long nSnappingPointsMinDist = nSnappingEpsilon; // minimum distance of two adjacent snapping points
66 :
67 : // nOffset referes to the origin of the control:
68 : // + ----------- -
69 0 : sal_uInt16 SvxZoomSliderControl::Offset2Zoom( long nOffset ) const
70 : {
71 0 : const long nControlWidth = getControlRect().GetWidth();
72 0 : sal_uInt16 nRet = 0;
73 :
74 0 : if ( nOffset < nSliderXOffset )
75 0 : return mpImpl->mnMinZoom;
76 :
77 0 : if ( nOffset > nControlWidth - nSliderXOffset )
78 0 : return mpImpl->mnMaxZoom;
79 :
80 : // check for snapping points:
81 0 : sal_uInt16 nCount = 0;
82 0 : std::vector< long >::iterator aSnappingPointIter;
83 0 : for ( aSnappingPointIter = mpImpl->maSnappingPointOffsets.begin();
84 0 : aSnappingPointIter != mpImpl->maSnappingPointOffsets.end();
85 : ++aSnappingPointIter )
86 : {
87 0 : const long nCurrent = *aSnappingPointIter;
88 0 : if ( std::abs(nCurrent - nOffset) < nSnappingEpsilon )
89 : {
90 0 : nOffset = nCurrent;
91 0 : nRet = mpImpl->maSnappingPointZooms[ nCount ];
92 0 : break;
93 : }
94 0 : ++nCount;
95 : }
96 :
97 0 : if ( 0 == nRet )
98 : {
99 0 : if ( nOffset < nControlWidth / 2 )
100 : {
101 : // first half of slider
102 0 : const long nFirstHalfRange = mpImpl->mnSliderCenter - mpImpl->mnMinZoom;
103 0 : const long nHalfSliderWidth = nControlWidth/2 - nSliderXOffset;
104 0 : const long nZoomPerSliderPixel = (1000 * nFirstHalfRange) / nHalfSliderWidth;
105 0 : const long nOffsetToSliderLeft = nOffset - nSliderXOffset;
106 0 : nRet = mpImpl->mnMinZoom + sal_uInt16( nOffsetToSliderLeft * nZoomPerSliderPixel / 1000 );
107 : }
108 : else
109 : {
110 : // second half of slider
111 0 : const long nSecondHalfRange = mpImpl->mnMaxZoom - mpImpl->mnSliderCenter;
112 0 : const long nHalfSliderWidth = nControlWidth/2 - nSliderXOffset;
113 0 : const long nZoomPerSliderPixel = 1000 * nSecondHalfRange / nHalfSliderWidth;
114 0 : const long nOffsetToSliderCenter = nOffset - nControlWidth/2;
115 0 : nRet = mpImpl->mnSliderCenter + sal_uInt16( nOffsetToSliderCenter * nZoomPerSliderPixel / 1000 );
116 : }
117 : }
118 :
119 0 : if ( nRet < mpImpl->mnMinZoom )
120 0 : nRet = mpImpl->mnMinZoom;
121 0 : else if ( nRet > mpImpl->mnMaxZoom )
122 0 : nRet = mpImpl->mnMaxZoom;
123 :
124 0 : return nRet;
125 : }
126 :
127 : // returns the offset to the left control border
128 4983 : long SvxZoomSliderControl::Zoom2Offset( sal_uInt16 nCurrentZoom ) const
129 : {
130 4983 : const long nControlWidth = getControlRect().GetWidth();
131 4983 : long nRet = nSliderXOffset;
132 :
133 4983 : const long nHalfSliderWidth = nControlWidth/2 - nSliderXOffset;
134 :
135 4983 : if ( nCurrentZoom <= mpImpl->mnSliderCenter )
136 : {
137 4943 : nCurrentZoom = nCurrentZoom - mpImpl->mnMinZoom;
138 4943 : const long nFirstHalfRange = mpImpl->mnSliderCenter - mpImpl->mnMinZoom;
139 4943 : const long nSliderPixelPerZoomPercent = 1000 * nHalfSliderWidth / nFirstHalfRange;
140 4943 : const long nOffset = (nSliderPixelPerZoomPercent * nCurrentZoom) / 1000;
141 4943 : nRet += nOffset;
142 : }
143 : else
144 : {
145 40 : nCurrentZoom = nCurrentZoom - mpImpl->mnSliderCenter;
146 40 : const long nSecondHalfRange = mpImpl->mnMaxZoom - mpImpl->mnSliderCenter;
147 40 : const long nSliderPixelPerZoomPercent = 1000 * nHalfSliderWidth / nSecondHalfRange;
148 40 : const long nOffset = (nSliderPixelPerZoomPercent * nCurrentZoom) / 1000;
149 40 : nRet += nHalfSliderWidth + nOffset;
150 : }
151 :
152 4983 : return nRet;
153 : }
154 :
155 1464 : SvxZoomSliderControl::SvxZoomSliderControl( sal_uInt16 _nSlotId, sal_uInt16 _nId, StatusBar& _rStb ) :
156 : SfxStatusBarControl( _nSlotId, _nId, _rStb ),
157 1464 : mpImpl( new SvxZoomSliderControl_Impl )
158 : {
159 1464 : mpImpl->maSliderButton = Image( SVX_RES( RID_SVXBMP_SLIDERBUTTON ) );
160 1464 : mpImpl->maIncreaseButton = Image( SVX_RES( RID_SVXBMP_SLIDERINCREASE ) );
161 1464 : mpImpl->maDecreaseButton = Image( SVX_RES( RID_SVXBMP_SLIDERDECREASE ) );
162 :
163 : //#ifndef MACOSX
164 1464 : if ( _rStb.GetDPIScaleFactor() > 1)
165 : {
166 0 : Image arr[3] = {mpImpl->maSliderButton, mpImpl->maIncreaseButton, mpImpl->maDecreaseButton};
167 :
168 0 : for (int i = 0; i < 3; i++)
169 : {
170 0 : BitmapEx b = arr[i].GetBitmapEx();
171 : //Use Lanczos scaling for the slider button because it does a better job with circles
172 0 : b.Scale(_rStb.GetDPIScaleFactor(), _rStb.GetDPIScaleFactor(), i == 0 ? BMP_SCALE_LANCZOS : BMP_SCALE_FAST);
173 0 : arr[i] = Image(b);
174 0 : }
175 0 : mpImpl->maSliderButton = arr[0];
176 0 : mpImpl->maIncreaseButton = arr[1];
177 0 : mpImpl->maDecreaseButton = arr[2];
178 : }
179 : //#endif
180 1464 : }
181 :
182 2928 : SvxZoomSliderControl::~SvxZoomSliderControl()
183 : {
184 2928 : }
185 :
186 1684 : void SvxZoomSliderControl::StateChanged( sal_uInt16 /*nSID*/, SfxItemState eState, const SfxPoolItem* pState )
187 : {
188 1684 : if ( (SfxItemState::DEFAULT != eState) || pState->ISA( SfxVoidItem ) )
189 : {
190 0 : GetStatusBar().SetItemText( GetId(), "" );
191 0 : mpImpl->mbValuesSet = false;
192 : }
193 : else
194 : {
195 : OSL_ENSURE( pState->ISA( SvxZoomSliderItem ), "invalid item type: should be a SvxZoomSliderItem" );
196 1684 : mpImpl->mnCurrentZoom = static_cast<const SvxZoomSliderItem*>( pState )->GetValue();
197 1684 : mpImpl->mnMinZoom = static_cast<const SvxZoomSliderItem*>( pState )->GetMinZoom();
198 1684 : mpImpl->mnMaxZoom = static_cast<const SvxZoomSliderItem*>( pState )->GetMaxZoom();
199 1684 : mpImpl->mnSliderCenter= 100;
200 1684 : mpImpl->mbValuesSet = true;
201 :
202 1684 : if ( mpImpl->mnSliderCenter == mpImpl->mnMaxZoom )
203 0 : mpImpl->mnSliderCenter = mpImpl->mnMinZoom + (sal_uInt16)((mpImpl->mnMaxZoom - mpImpl->mnMinZoom) * 0.5);
204 :
205 :
206 : DBG_ASSERT( mpImpl->mnMinZoom <= mpImpl->mnCurrentZoom &&
207 : mpImpl->mnMinZoom < mpImpl->mnSliderCenter &&
208 : mpImpl->mnMaxZoom >= mpImpl->mnCurrentZoom &&
209 : mpImpl->mnMaxZoom > mpImpl->mnSliderCenter,
210 : "Looks like the zoom slider item is corrupted" );
211 :
212 1684 : const com::sun::star::uno::Sequence < sal_Int32 > rSnappingPoints = static_cast<const SvxZoomSliderItem*>( pState )->GetSnappingPoints();
213 1684 : mpImpl->maSnappingPointOffsets.clear();
214 1684 : mpImpl->maSnappingPointZooms.clear();
215 :
216 : // get all snapping points:
217 3368 : std::set< sal_uInt16 > aTmpSnappingPoints;
218 5651 : for ( sal_uInt16 j = 0; j < rSnappingPoints.getLength(); ++j )
219 : {
220 3967 : const sal_Int32 nSnappingPoint = rSnappingPoints[j];
221 3967 : aTmpSnappingPoints.insert( (sal_uInt16)nSnappingPoint );
222 : }
223 :
224 : // remove snapping points that are to close to each other:
225 1684 : std::set< sal_uInt16 >::iterator aSnappingPointIter;
226 1684 : long nLastOffset = 0;
227 :
228 4618 : for ( aSnappingPointIter = aTmpSnappingPoints.begin(); aSnappingPointIter != aTmpSnappingPoints.end(); ++aSnappingPointIter )
229 : {
230 2934 : const sal_uInt16 nCurrent = *aSnappingPointIter;
231 2934 : const long nCurrentOffset = Zoom2Offset( nCurrent );
232 :
233 2934 : if ( nCurrentOffset - nLastOffset >= nSnappingPointsMinDist )
234 : {
235 1926 : mpImpl->maSnappingPointOffsets.push_back( nCurrentOffset );
236 1926 : mpImpl->maSnappingPointZooms.push_back( nCurrent );
237 1926 : nLastOffset = nCurrentOffset;
238 : }
239 1684 : }
240 : }
241 :
242 1684 : if (!mpImpl->mbOmitPaint)
243 1684 : forceRepaint();
244 1684 : }
245 :
246 2049 : void SvxZoomSliderControl::Paint( const UserDrawEvent& rUsrEvt )
247 : {
248 2049 : if ( !mpImpl->mbValuesSet || mpImpl->mbOmitPaint )
249 2049 : return;
250 :
251 2049 : const Rectangle aControlRect = getControlRect();
252 2049 : OutputDevice* pDev = rUsrEvt.GetDevice();
253 2049 : Rectangle aRect = rUsrEvt.GetRect();
254 2049 : Rectangle aSlider = aRect;
255 :
256 2049 : long nSliderHeight = 2 * pDev->GetDPIScaleFactor();
257 2049 : long nSnappingHeight = 4 * pDev->GetDPIScaleFactor();
258 :
259 2049 : aSlider.Top() += (aControlRect.GetHeight() - nSliderHeight)/2;
260 2049 : aSlider.Bottom() = aSlider.Top() + nSliderHeight - 1;
261 2049 : aSlider.Left() += nSliderXOffset;
262 2049 : aSlider.Right() -= nSliderXOffset;
263 :
264 2049 : Color aOldLineColor = pDev->GetLineColor();
265 2049 : Color aOldFillColor = pDev->GetFillColor();
266 :
267 2049 : const StyleSettings& rStyleSettings = Application::GetSettings().GetStyleSettings();
268 2049 : pDev->SetLineColor( rStyleSettings.GetShadowColor() );
269 2049 : pDev->SetFillColor( rStyleSettings.GetShadowColor() );
270 :
271 :
272 : // draw snapping points:
273 2049 : std::vector< long >::iterator aSnappingPointIter;
274 13362 : for ( aSnappingPointIter = mpImpl->maSnappingPointOffsets.begin();
275 8908 : aSnappingPointIter != mpImpl->maSnappingPointOffsets.end();
276 : ++aSnappingPointIter )
277 : {
278 2405 : long nSnapPosX = aRect.Left() + *aSnappingPointIter;
279 :
280 2405 : pDev->DrawRect( Rectangle( nSnapPosX - 1, aSlider.Top() - nSnappingHeight,
281 4810 : nSnapPosX, aSlider.Bottom() + nSnappingHeight ) );
282 : }
283 :
284 : // draw slider
285 2049 : pDev->DrawRect( aSlider );
286 :
287 : // draw slider button
288 2049 : Point aImagePoint = aRect.TopLeft();
289 2049 : aImagePoint.X() += Zoom2Offset( mpImpl->mnCurrentZoom );
290 2049 : aImagePoint.X() -= mpImpl->maSliderButton.GetSizePixel().Width()/2;
291 2049 : aImagePoint.Y() += (aControlRect.GetHeight() - mpImpl->maSliderButton.GetSizePixel().Height())/2;
292 2049 : pDev->DrawImage( aImagePoint, mpImpl->maSliderButton );
293 :
294 : // draw decrease button
295 2049 : aImagePoint = aRect.TopLeft();
296 2049 : aImagePoint.X() += (nSliderXOffset - mpImpl->maDecreaseButton.GetSizePixel().Width())/2;
297 2049 : aImagePoint.Y() += (aControlRect.GetHeight() - mpImpl->maDecreaseButton.GetSizePixel().Height())/2;
298 2049 : pDev->DrawImage( aImagePoint, mpImpl->maDecreaseButton );
299 :
300 : // draw increase button
301 2049 : aImagePoint.X() = aRect.TopLeft().X() + aControlRect.GetWidth() - mpImpl->maIncreaseButton.GetSizePixel().Width() - (nSliderXOffset - mpImpl->maIncreaseButton.GetSizePixel().Height())/2;
302 2049 : pDev->DrawImage( aImagePoint, mpImpl->maIncreaseButton );
303 :
304 2049 : pDev->SetLineColor( aOldLineColor );
305 2049 : pDev->SetFillColor( aOldFillColor );
306 : }
307 :
308 0 : bool SvxZoomSliderControl::MouseButtonDown( const MouseEvent & rEvt )
309 : {
310 0 : if ( !mpImpl->mbValuesSet )
311 0 : return true;
312 :
313 0 : const Rectangle aControlRect = getControlRect();
314 0 : const Point aPoint = rEvt.GetPosPixel();
315 0 : const sal_Int32 nXDiff = aPoint.X() - aControlRect.Left();
316 :
317 0 : long nIncDecWidth = mpImpl->maIncreaseButton.GetSizePixel().Width();
318 :
319 0 : const long nButtonLeftOffset = (nSliderXOffset - nIncDecWidth)/2;
320 0 : const long nButtonRightOffset = (nSliderXOffset + nIncDecWidth)/2;
321 :
322 0 : const long nOldZoom = mpImpl->mnCurrentZoom;
323 :
324 : // click to - button
325 0 : if ( nXDiff >= nButtonLeftOffset && nXDiff <= nButtonRightOffset )
326 0 : mpImpl->mnCurrentZoom = basegfx::zoomtools::zoomOut( static_cast<int>(mpImpl->mnCurrentZoom) );
327 : // click to + button
328 0 : else if ( nXDiff >= aControlRect.GetWidth() - nSliderXOffset + nButtonLeftOffset &&
329 0 : nXDiff <= aControlRect.GetWidth() - nSliderXOffset + nButtonRightOffset )
330 0 : mpImpl->mnCurrentZoom = basegfx::zoomtools::zoomIn( static_cast<int>(mpImpl->mnCurrentZoom) );
331 : // click to slider
332 0 : else if( nXDiff >= nSliderXOffset && nXDiff <= aControlRect.GetWidth() - nSliderXOffset )
333 0 : mpImpl->mnCurrentZoom = Offset2Zoom( nXDiff );
334 :
335 0 : if ( mpImpl->mnCurrentZoom < mpImpl->mnMinZoom )
336 0 : mpImpl->mnCurrentZoom = mpImpl->mnMinZoom;
337 0 : else if ( mpImpl->mnCurrentZoom > mpImpl->mnMaxZoom )
338 0 : mpImpl->mnCurrentZoom = mpImpl->mnMaxZoom;
339 :
340 0 : if ( nOldZoom == mpImpl->mnCurrentZoom )
341 0 : return true;
342 :
343 0 : repaintAndExecute();
344 :
345 0 : return true;
346 : }
347 :
348 0 : bool SvxZoomSliderControl::MouseMove( const MouseEvent & rEvt )
349 : {
350 0 : if ( !mpImpl->mbValuesSet )
351 0 : return true;
352 :
353 0 : const short nButtons = rEvt.GetButtons();
354 :
355 : // check mouse move with button pressed
356 0 : if ( 1 == nButtons )
357 : {
358 0 : const Rectangle aControlRect = getControlRect();
359 0 : const Point aPoint = rEvt.GetPosPixel();
360 0 : const sal_Int32 nXDiff = aPoint.X() - aControlRect.Left();
361 :
362 0 : if ( nXDiff >= nSliderXOffset && nXDiff <= aControlRect.GetWidth() - nSliderXOffset )
363 : {
364 0 : mpImpl->mnCurrentZoom = Offset2Zoom( nXDiff );
365 :
366 0 : repaintAndExecute();
367 : }
368 : }
369 :
370 0 : return true;
371 : }
372 :
373 1684 : void SvxZoomSliderControl::forceRepaint() const
374 : {
375 1684 : if (GetStatusBar().AreItemsVisible())
376 1684 : GetStatusBar().SetItemData(GetId(), 0);
377 1684 : }
378 :
379 0 : void SvxZoomSliderControl::repaintAndExecute()
380 : {
381 0 : forceRepaint();
382 :
383 0 : mpImpl->mbOmitPaint = true; // optimization: paint before executing command,
384 : // then omit painting which is triggered by the execute function
385 :
386 : // commit state change
387 0 : SvxZoomSliderItem aZoomSliderItem(mpImpl->mnCurrentZoom);
388 :
389 0 : css::uno::Any any;
390 0 : aZoomSliderItem.QueryValue(any);
391 :
392 0 : css::uno::Sequence<css::beans::PropertyValue> aArgs(1);
393 0 : aArgs[0].Name = "ZoomSlider";
394 0 : aArgs[0].Value = any;
395 :
396 0 : execute(aArgs);
397 :
398 0 : mpImpl->mbOmitPaint = false;
399 594 : }
400 :
401 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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