1 /* This file is part of the KDE project
2 * Copyright (C) 2007 C. Boemann <cbo@boemann.dk>
3 * Copyright (C) 2007 Thomas Zander <zander@kde.org>
4 * Copyright (C) 2007 Jan Hambrecht <jaham@gmx.net>
5 * Copyright (C) 2010 Boudewijn Rempt <boud@kogmbh.com>
6 * Copyright (C) 2011 Arjen Hiemstra <ahiemstra@heimr.nl>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23 #include <KoZoomController.h>
24 #include <KoZoomController_p.h>
25
26 #include <kactioncollection.h>
27 #include <klocalizedstring.h>
28 #include <WidgetsDebug.h>
29
30 #include <KoZoomHandler.h>
31 #include <KoCanvasBase.h>
32 #include <KoCanvasController.h>
33
init(KoCanvasController * co,KoZoomHandler * zh,KActionCollection * actionCollection,bool createZoomShortcuts)34 void KoZoomController::Private::init(KoCanvasController *co,
35 KoZoomHandler *zh,
36 KActionCollection *actionCollection,
37 bool createZoomShortcuts)
38 {
39 canvasController = co;
40 fitMargin = co->margin();
41 zoomHandler = zh;
42 connect(action, SIGNAL(zoomChanged(KoZoomMode::Mode,qreal)),
43 parent, SLOT(setZoom(KoZoomMode::Mode,qreal)));
44 connect(action, SIGNAL(aspectModeChanged(bool)),
45 parent, SIGNAL(aspectModeChanged(bool)));
46 connect(action, SIGNAL(zoomedToSelection()),
47 parent, SIGNAL(zoomedToSelection()));
48 connect(action, SIGNAL(zoomedToAll()),
49 parent, SIGNAL(zoomedToAll()));
50
51 actionCollection->addAction("view_zoom", action);
52
53 if (createZoomShortcuts) {
54 actionCollection->addAction(KStandardAction::ZoomIn, "zoom_in", action, SLOT(zoomIn()));
55 actionCollection->addAction(KStandardAction::ZoomOut, "zoom_out", action, SLOT(zoomOut()));
56 }
57
58 connect(canvasController->proxyObject, SIGNAL(sizeChanged(QSize)), parent, SLOT(setAvailableSize()) );
59
60 connect(canvasController->proxyObject, SIGNAL(zoomRelative(qreal,QPointF)), parent, SLOT(requestZoomRelative(qreal,QPointF)) );
61 }
62
KoZoomController(KoCanvasController * co,KoZoomHandler * zh,KActionCollection * actionCollection,KoZoomAction::SpecialButtons specialButtons,QObject * parent)63 KoZoomController::KoZoomController(KoCanvasController *co, KoZoomHandler *zh, KActionCollection *actionCollection, KoZoomAction::SpecialButtons specialButtons, QObject *parent)
64 : QObject(parent),
65 d(new Private(this, specialButtons))
66 {
67 d->init(co, zh, actionCollection, true);
68 }
69
70
KoZoomController(KoCanvasController * co,KoZoomHandler * zh,KActionCollection * actionCollection,bool createZoomShortcuts,KoZoomAction::SpecialButtons specialButtons,QObject * parent)71 KoZoomController::KoZoomController(KoCanvasController *co, KoZoomHandler *zh, KActionCollection *actionCollection, bool createZoomShortcuts, KoZoomAction::SpecialButtons specialButtons, QObject *parent)
72 : QObject(parent),
73 d(new Private(this, specialButtons))
74 {
75 d->init(co, zh, actionCollection, createZoomShortcuts);
76 }
77
~KoZoomController()78 KoZoomController::~KoZoomController()
79 {
80 delete d;
81 }
82
zoomAction() const83 KoZoomAction *KoZoomController::zoomAction() const
84 {
85 return d->action;
86 }
87
setZoomMode(KoZoomMode::Mode mode)88 void KoZoomController::setZoomMode(KoZoomMode::Mode mode)
89 {
90 setZoom(mode, 1.0);
91 }
92
setPageSize(const QSizeF & pageSize)93 void KoZoomController::setPageSize(const QSizeF &pageSize)
94 {
95 if(d->pageSize == pageSize) return;
96 d->pageSize = pageSize;
97
98 if(d->zoomHandler->zoomMode() == KoZoomMode::ZOOM_WIDTH)
99 setZoom(KoZoomMode::ZOOM_WIDTH, 0);
100 if(d->zoomHandler->zoomMode() == KoZoomMode::ZOOM_PAGE)
101 setZoom(KoZoomMode::ZOOM_PAGE, 0);
102 }
103
pageSize() const104 QSizeF KoZoomController::pageSize() const
105 {
106 return d->pageSize;
107 }
108
setTextMinMax(qreal min,qreal max)109 void KoZoomController::setTextMinMax(qreal min, qreal max)
110 {
111 if(d->textMinX == min && d->textMaxX == max) {
112 return;
113 }
114 d->textMinX = min;
115 d->textMaxX = max;
116
117 if(d->zoomHandler->zoomMode() == KoZoomMode::ZOOM_TEXT)
118 setZoom(KoZoomMode::ZOOM_TEXT, 0);
119 }
120
setDocumentSize(const QSizeF & documentSize,bool recalculateCenter)121 void KoZoomController::setDocumentSize(const QSizeF &documentSize, bool recalculateCenter)
122 {
123 d->documentSize = documentSize;
124 d->canvasController->updateDocumentSize(documentToViewport(d->documentSize), recalculateCenter);
125
126 // Finally ask the canvasController to recenter
127 d->canvasController->recenterPreferred();
128 }
129
documentSize() const130 QSizeF KoZoomController::documentSize() const
131 {
132 return d->documentSize;
133 }
134
setZoom(KoZoomMode::Mode mode,qreal zoom)135 void KoZoomController::setZoom(KoZoomMode::Mode mode, qreal zoom)
136 {
137 setZoom(mode, zoom, d->canvasController->preferredCenter());
138 }
139
setZoom(KoZoomMode::Mode mode,qreal zoom,const QPointF & stillPoint)140 void KoZoomController::setZoom(KoZoomMode::Mode mode, qreal zoom, const QPointF &stillPoint)
141 {
142 setZoom(mode, zoom, d->zoomHandler->resolutionX(), d->zoomHandler->resolutionY(), stillPoint);
143 }
144
setZoom(KoZoomMode::Mode mode,qreal zoom,qreal resolutionX,qreal resolutionY)145 void KoZoomController::setZoom(KoZoomMode::Mode mode, qreal zoom, qreal resolutionX, qreal resolutionY)
146 {
147 setZoom(mode, zoom, resolutionX, resolutionY, d->canvasController->preferredCenter());
148 }
149
setZoom(KoZoomMode::Mode mode,qreal zoom,qreal resolutionX,qreal resolutionY,const QPointF & stillPoint)150 void KoZoomController::setZoom(KoZoomMode::Mode mode, qreal zoom, qreal resolutionX, qreal resolutionY, const QPointF &stillPoint)
151 {
152 if (d->zoomHandler->zoomMode() == mode &&
153 qFuzzyCompare(d->zoomHandler->zoom(), zoom) &&
154 qFuzzyCompare(d->zoomHandler->resolutionX(), resolutionX) &&
155 qFuzzyCompare(d->zoomHandler->resolutionY(), resolutionY)) {
156 return; // no change
157 }
158
159 qreal oldEffectiveZoom = d->action->effectiveZoom();
160 QSize oldPageViewportSize = documentToViewport(d->pageSize);
161 QSize oldTextViewportSize = documentToViewport(QSizeF(d->textMaxX-d->textMinX, 1));
162 qreal yfixAlignTop = d->canvasController->viewportSize().height();
163
164 if(!qFuzzyCompare(d->zoomHandler->resolutionX(), resolutionX) ||
165 !qFuzzyCompare(d->zoomHandler->resolutionY(), resolutionY)) {
166
167 d->zoomHandler->setResolution(resolutionX, resolutionY);
168 }
169
170 if(mode == KoZoomMode::ZOOM_CONSTANT) {
171 if(zoom == 0.0) return;
172 d->action->setZoom(zoom);
173 }
174 else if(mode == KoZoomMode::ZOOM_WIDTH) {
175 zoom = (d->canvasController->viewportSize().width() - 2 * d->fitMargin)
176 / (oldPageViewportSize.width() / d->zoomHandler->zoom());
177 d->action->setSelectedZoomMode(mode);
178 d->action->setEffectiveZoom(zoom);
179 }
180 else if(mode == KoZoomMode::ZOOM_PAGE) {
181 zoom = (d->canvasController->viewportSize().width() - 2 * d->fitMargin)
182 / (oldPageViewportSize.width() / d->zoomHandler->zoom());
183 zoom = qMin(zoom, (d->canvasController->viewportSize().height() - 2 * d->fitMargin)
184 / (oldPageViewportSize.height() / d->zoomHandler->zoom()));
185
186 d->action->setSelectedZoomMode(mode);
187 d->action->setEffectiveZoom(zoom);
188 }
189 else if (mode == KoZoomMode::ZOOM_TEXT) {
190 zoom = (d->canvasController->viewportSize().width() - 2 * d->fitMargin)
191 / (oldTextViewportSize.width() / d->zoomHandler->zoom());
192 d->action->setSelectedZoomMode(mode);
193 d->action->setEffectiveZoom(zoom);
194 }
195
196 d->zoomHandler->setZoomMode(mode);
197 d->zoomHandler->setZoom(d->action->effectiveZoom());
198
199 #ifdef DEBUG
200 if(! d->documentSize.isValid())
201 warnWidgets << "Setting zoom while there is no document size set, this will fail";
202 else if (d->pageSize.width() > d->documentSize.width() || d->pageSize.height() > d->documentSize.height())
203 warnWidgets << "ZoomController; Your page size is larger than your document size (" <<
204 d->pageSize << " > " << d->documentSize << ")\n";
205 #endif
206
207 QSize documentViewportSize = documentToViewport(d->documentSize);
208
209 // Tell the canvasController that the zoom has changed
210 // Actually canvasController doesn't know about zoom, but the document in pixels
211 // has changed as a result of the zoom change
212 // To allow listeners of offset changes to react on the real new offset and not on the
213 // intermediate offsets, we block the signals here, and emit by ourselves later.
214 d->canvasController->proxyObject->blockSignals(true);
215 d->canvasController->updateDocumentSize(documentViewportSize, true);
216 d->canvasController->proxyObject->blockSignals(false);
217
218 // Finally ask the canvasController to recenter
219 if (d->canvasController->canvasMode() == KoCanvasController::Infinite) {
220 QPointF documentCenter;
221 if (mode == KoZoomMode::ZOOM_WIDTH || mode == KoZoomMode::ZOOM_PAGE) {
222 documentCenter = QRectF(QPointF(), documentViewportSize).center();
223 }
224 else {
225 qreal zoomCoeff = d->action->effectiveZoom() / oldEffectiveZoom;
226 QPointF oldCenter = d->canvasController->preferredCenter();
227 documentCenter = stillPoint * zoomCoeff - (stillPoint - 1.0 / zoomCoeff * oldCenter);
228 }
229 d->canvasController->setPreferredCenter(documentCenter);
230 }
231 else if (mode == KoZoomMode::ZOOM_TEXT) {
232 QPointF documentCenter = d->canvasController->preferredCenter();
233 yfixAlignTop -= d->canvasController->viewportSize().height();
234
235 documentCenter.setX(d->zoomHandler->documentToViewX(d->textMinX + d->textMaxX) * 0.5);
236 documentCenter.setY(documentCenter.y() - yfixAlignTop);
237 d->canvasController->setPreferredCenter(documentCenter);
238 } else {
239 if (d->canvasController->canvasMode() == KoCanvasController::AlignTop) {
240 QPointF documentCenter = d->canvasController->preferredCenter();
241 documentCenter.setX(0.0);
242 d->canvasController->setPreferredCenter(documentCenter);
243 } else {
244 d->canvasController->recenterPreferred();
245 }
246 }
247
248 // now that we have the final offset, let's emit some signals
249 //d->canvasController->proxyObject->emitCanvasOffsetXChanged(d->canvasController->canvasOffsetX());
250 //d->canvasController->proxyObject->emitCanvasOffsetYChanged(d->canvasController->canvasOffsetY());
251 emit zoomChanged(mode, d->action->effectiveZoom());
252 }
253
documentToViewport(const QSizeF & size)254 QSize KoZoomController::documentToViewport(const QSizeF &size)
255 {
256 return d->zoomHandler->documentToView(size).toSize();
257 }
258
setAspectMode(bool status)259 void KoZoomController::setAspectMode(bool status)
260 {
261 if (d->action) {
262 d->action->setAspectMode(status);
263 }
264 }
265 //have to include this because of Q_PRIVATE_SLOT
266 #include <moc_KoZoomController.cpp>
267