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qrubberband.cpp

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39 -

40 #include "qbitmap.h" -

41 #include "qevent.h" -

42 #include "qstylepainter.h" -

43 #include "qrubberband.h" -

44 #include "qtimer.h" -

45 -

46 #ifndef QT_NO_RUBBERBAND -

47 -

48 #include "qstyle.h" -

49 #include "qstyleoption.h" -

50 #ifdef Q_DEAD_CODE_FROM_QT4_MAC -

51 # include <private/qt_mac_p.h> -

52 # include <private/qt_cocoa_helpers_mac_p.h> -

53 #endif -

54 -

55 #include <qdebug.h> -

56 -

57 #include <private/qwidget_p.h> -

58 -

59 QT_BEGIN_NAMESPACE -

60 -

61 //### a rubberband window type would be a more elegant solution -

62 #define RUBBERBAND_WINDOW_TYPE Qt::ToolTip -

63 -

64 class QRubberBandPrivate : public QWidgetPrivate -

65 { -

66 Q_DECLARE_PUBLIC(QRubberBand) -

67 public: -

68 QRect rect; -

69 QRubberBand::Shape shape; -

70 QRegion clipping; -

71 void updateMask(); -

72 }; -

73 -

74 /*! -

75 Initialize \a option with the values from this QRubberBand. This method -

76 is useful for subclasses when they need a QStyleOptionRubberBand, but don't want -

77 to fill in all the information themselves. -

78 -

79 \sa QStyleOption::initFrom() -

80 */ -

81 void QRubberBand::initStyleOption(QStyleOptionRubberBand *option) const -

82 { -

if (!option)

!option	Description
TRUE	never evaluated
FALSE	never evaluated

return;

never executed: return;

85 option->initFrom(this); -

86 option->shape = d_func()->shape; -

87 #ifndef Q_OS_MAC -

88 option->opaque = true; -

89 #else -

90 option->opaque = windowFlags() & RUBBERBAND_WINDOW_TYPE; -

91 #endif -

}

never executed: end of block

93 -

94 /*! -

95 \class QRubberBand -

96 \brief The QRubberBand class provides a rectangle or line that can -

97 indicate a selection or a boundary. -

98 -

99 \inmodule QtWidgets -

100 -

101 A rubber band is often used to show a new bounding area (as in a -

102 QSplitter or a QDockWidget that is undocking). Historically this has -

103 been implemented using a QPainter and XOR, but this approach -

104 doesn't always work properly since rendering can happen in the -

105 window below the rubber band, but before the rubber band has been -

106 "erased". -

107 -

108 You can create a QRubberBand whenever you need to render a rubber band -

109 around a given area (or to represent a single line), then call -

110 setGeometry(), move() or resize() to position and size it. A common -

111 pattern is to do this in conjunction with mouse events. For example: -

112 -

113 \snippet code/src_gui_widgets_qrubberband.cpp 0 -

114 -

115 If you pass a parent to QRubberBand's constructor, the rubber band will -

116 display only inside its parent, but stays on top of other child widgets. -

117 If no parent is passed, QRubberBand will act as a top-level widget. -

118 -

119 Call show() to make the rubber band visible; also when the -

120 rubber band is not a top-level. Hiding or destroying -

121 the widget will make the rubber band disappear. The rubber band -

122 can be a \l Rectangle or a \l Line (vertical or horizontal), -

123 depending on the shape() it was given when constructed. -

124 */ -

125 -

126 // ### DOC: How about some nice convenience constructors? -

127 //QRubberBand::QRubberBand(QRubberBand::Type t, const QRect &rect, QWidget *p) -

128 //QRubberBand::QRubberBand(QRubberBand::Type t, int x, int y, int w, int h, QWidget *p) -

129 -

130 /*! -

131 Constructs a rubber band of shape \a s, with parent \a p. -

132 -

133 By default a rectangular rubber band (\a s is \c Rectangle) will -

134 use a mask, so that a small border of the rectangle is all -

135 that is visible. Some styles (e.g., native \macos) will -

136 change this and call QWidget::setWindowOpacity() to make a -

137 semi-transparent filled selection rectangle. -

138 */ -

139 QRubberBand::QRubberBand(Shape s, QWidget *p) -

140 : QWidget(*new QRubberBandPrivate, p, (p && p->windowType() != Qt::Desktop) ? Qt::Widget : RUBBERBAND_WINDOW_TYPE) -

141 { -

142 Q_D(QRubberBand); -

143 d->shape = s; -

144 setAttribute(Qt::WA_TransparentForMouseEvents); -

145 #ifndef Q_DEAD_CODE_FROM_QT4_WIN -

146 setAttribute(Qt::WA_NoSystemBackground); -

147 #endif //Q_DEAD_CODE_FROM_QT4_WIN -

148 setAttribute(Qt::WA_WState_ExplicitShowHide); -

149 setVisible(false); -

150 #ifdef Q_DEAD_CODE_FROM_QT4_MAC -

151 if (isWindow()) { -

152 createWinId(); -

153 extern OSWindowRef qt_mac_window_for(const QWidget *); //qwidget_mac.cpp -

154 macWindowSetHasShadow(qt_mac_window_for(this), false); -

155 } -

156 #endif -

157

}

never executed: end of block

158 -

159 /*! -

160 Destructor. -

161 */ -

162 QRubberBand::~QRubberBand() -

163 { -

164 } -

165 -

166 /*! -

167 \enum QRubberBand::Shape -

168 -

169 This enum specifies what shape a QRubberBand should have. This is -

170 a drawing hint that is passed down to the style system, and can be -

171 interpreted by each QStyle. -

172 -

173 \value Line A QRubberBand can represent a vertical or horizontal -

174 line. Geometry is still given in rect() and the line -

175 will fill the given geometry on most styles. -

176 -

177 \value Rectangle A QRubberBand can represent a rectangle. Some -

178 styles will interpret this as a filled (often -

179 semi-transparent) rectangle, or a rectangular -

180 outline. -

181 */ -

182 -

183 /*! -

184 Returns the shape of this rubber band. The shape can only be set -

185 upon construction. -

186 */ -

187 QRubberBand::Shape QRubberBand::shape() const -

188 { -

189 Q_D(const QRubberBand); -

190

return d->shape;

never executed: return d->shape;

191 } -

192 -

193 /*! -

194 \internal -

195 */ -

196 void QRubberBandPrivate::updateMask() -

197 { -

198 Q_Q(QRubberBand); -

199 QStyleHintReturnMask mask; -

200 QStyleOptionRubberBand opt; -

201 q->initStyleOption(&opt); -

202

if (q->style()->styleHint(QStyle::SH_RubberBand_Mask, &opt, q, &mask)) {

q->style()->st...opt, q, &mask)	Description
TRUE	never evaluated
FALSE	never evaluated

203 q->setMask(mask.region); -

204

} else {

never executed: end of block

205 q->clearMask(); -

206

}

never executed: end of block

207 } -

208 -

209 /*! -

210 \reimp -

211 */ -

212 void QRubberBand::paintEvent(QPaintEvent *) -

213 { -

214 QStylePainter painter(this); -

215 QStyleOptionRubberBand option; -

216 initStyleOption(&option); -

217 painter.drawControl(QStyle::CE_RubberBand, option); -

218

}

never executed: end of block

219 -

220 /*! -

221 \reimp -

222 */ -

223 void QRubberBand::changeEvent(QEvent *e) -

224 { -

225 QWidget::changeEvent(e); -

226 switch (e->type()) { -

227

case QEvent::ParentChange:

never executed: case QEvent::ParentChange:

228

if (parent()) {

parent()	Description
TRUE	never evaluated
FALSE	never evaluated

229 setWindowFlags(windowFlags() & ~RUBBERBAND_WINDOW_TYPE); -

230

} else {

never executed: end of block

231 setWindowFlags(windowFlags() | RUBBERBAND_WINDOW_TYPE); -

232

}

never executed: end of block

233

break;

never executed: break;

234

default:

never executed: default:

235

break;

never executed: break;

236 } -

237 -

238

if (e->type() == QEvent::ZOrderChange)

e->type() == Q...::ZOrderChange	Description
TRUE	never evaluated
FALSE	never evaluated

239

raise();

never executed: raise();

240

}

never executed: end of block

241 -

242 /*! -

243 \reimp -

244 */ -

245 void QRubberBand::showEvent(QShowEvent *e) -

246 { -

247 raise(); -

248 e->ignore(); -

249

}

never executed: end of block

250 -

251 /*! -

252 \reimp -

253 */ -

254 void QRubberBand::resizeEvent(QResizeEvent *) -

255 { -

256 Q_D(QRubberBand); -

257 d->updateMask(); -

258

}

never executed: end of block

259 -

260 /*! -

261 \reimp -

262 */ -

263 void QRubberBand::moveEvent(QMoveEvent *) -

264 { -

265 Q_D(QRubberBand); -

266 d->updateMask(); -

267

}

never executed: end of block

268 -

269 /*! -

270 \fn void QRubberBand::move(const QPoint &p); -

271 -

272 \overload -

273 -

274 Moves the rubberband to point \a p. -

275 -

276 \sa resize() -

277 */ -

278 -

279 /*! -

280 \fn void QRubberBand::move(int x, int y); -

281 -

282 Moves the rubberband to point (\a x, \a y). -

283 -

284 \sa resize() -

285 */ -

286 -

287 /*! -

288 \fn void QRubberBand::resize(const QSize &size); -

289 -

290 \overload -

291 -

292 Resizes the rubberband so that its new size is \a size. -

293 -

294 \sa move() -

295 */ -

296 -

297 /*! -

298 \fn void QRubberBand::resize(int width, int height); -

299 -

300 Resizes the rubberband so that its width is \a width, and its -

301 height is \a height. -

302 -

303 \sa move() -

304 */ -

305 -

306 /*! -

307 \fn void QRubberBand::setGeometry(const QRect &rect) -

308 -

309 Sets the geometry of the rubber band to \a rect, specified in the coordinate system -

310 of its parent widget. -

311 -

312 \sa QWidget::geometry -

313 */ -

314 void QRubberBand::setGeometry(const QRect &geom) -

315 { -

316 QWidget::setGeometry(geom); -

317

}

never executed: end of block

318 -

319 /*! -

320 \fn void QRubberBand::setGeometry(int x, int y, int width, int height) -

321 \overload -

322 -

323 Sets the geometry of the rubberband to the rectangle whose top-left corner lies at -

324 the point (\a x, \a y), and with dimensions specified by \a width and \a height. -

325 The geometry is specified in the parent widget's coordinate system. -

326 */ -

327 -

328 /*! \reimp */ -

329 bool QRubberBand::event(QEvent *e) -

330 { -

331

return QWidget::event(e);

never executed: return QWidget::event(e);

332 } -

333 -

334 QT_END_NAMESPACE -

335 -

336 #include "moc_qrubberband.cpp" -

337 -

338 #endif // QT_NO_RUBBERBAND -

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