1 /* 2 * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved. 3 * 4 * This file is part of the KD Chart library. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <https://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef KCHARTCHART_H 21 #define KCHARTCHART_H 22 23 #include <QWidget> 24 25 #include "kchart_export.h" 26 #include "KChartGlobal.h" 27 28 /* 29 Simplified(*) overview of object ownership in a chart: 30 31 Chart is-a QWidget 32 | 33 n CoordinatePlanes is-a AbstractArea is-a AbstractLayoutItem is-a QLayoutItem 34 | 35 n Diagrams is-a QAbstractItemView is-a QWidget 36 / | \ 37 AbstractGrid | Axes (can be shared between diagrams) is-a AbstractArea is-a... QLayoutItem 38 (no base class) | 39 Legends is-a AbstractAreaWidget is-a QWidget 40 41 (*) less important classes, including base classes, removed. 42 43 44 Layout rules: 45 46 In principle, every size or existence change in one of the objects listed above must be propagated 47 to all other objects. This could change their size. 48 There are also settings changes that invalidate the size of other components, where the size changes 49 are detected and propagated. 50 51 52 Painting call tree (simplified): 53 54 Chart::paint() (from users) / paintEvent() (from framework) 55 ChartPrivate::paintAll()-----------------------------------------------\ 56 CoordinatePlane::paintAll() (from AbstractArea)--------\ Axis::paintAll()-\ 57 CoordinatePlane::paint() (from AbstractLayoutItem) Grid::drawGrid() Axis::paint() 58 Diagram::paint( PaintContext* paintContext ) 59 60 Note that grids are painted from the coordinate plane, not from the diagram as ownership would suggest. 61 62 */ 63 64 namespace KChart { 65 66 class BackgroundAttributes; 67 class FrameAttributes; 68 class AbstractDiagram; 69 class AbstractCoordinatePlane; 70 class HeaderFooter; 71 class Legend; 72 73 typedef QList<AbstractCoordinatePlane*> CoordinatePlaneList; 74 typedef QList<HeaderFooter*> HeaderFooterList; 75 typedef QList<Legend*> LegendList; 76 77 78 /** 79 * @class Chart KChartChart.h KChartChart 80 * @brief A chart with one or more diagrams. 81 * 82 * The Chart class represents a drawing consisting of one or more diagrams 83 * and various optional elements such as legends, axes, text boxes, headers 84 * or footers. It takes ownership of all these elements when they are assigned 85 * to it. Each diagram is associated with a coordinate plane, of which the chart 86 * can have more than one. The coordinate planes (and thus the associated diagrams) 87 * can be laid out in various ways. 88 * 89 * The Chart class makes heavy use of the Qt Interview framework for model/view 90 * programming, and thus requires data to be presented to it in a QAbstractItemModel 91 * compatible way. For many simple charts, especially if the visualized data is 92 * static, KChart::Widget provides an abstracted interface, that hides the complexity 93 * of Interview to a large extent. 94 */ 95 class KCHART_EXPORT Chart : public QWidget 96 { 97 Q_OBJECT 98 // KD Chart 3.0: leading is inter-line distance of text. this here is MARGIN or SPACING. 99 Q_PROPERTY( int globalLeadingTop READ globalLeadingTop WRITE setGlobalLeadingTop ) 100 Q_PROPERTY( int globalLeadingBottom READ globalLeadingBottom WRITE setGlobalLeadingBottom ) 101 Q_PROPERTY( int globalLeadingLeft READ globalLeadingLeft WRITE setGlobalLeadingLeft ) 102 Q_PROPERTY( int globalLeadingRight READ globalLeadingRight WRITE setGlobalLeadingRight ) 103 Q_PROPERTY( bool useNewLayoutSystem READ useNewLayoutSystem WRITE setUseNewLayoutSystem ) 104 105 KCHART_DECLARE_PRIVATE_BASE_POLYMORPHIC_QWIDGET( Chart ) 106 107 public: 108 explicit Chart ( QWidget* parent = nullptr ); 109 ~Chart(); 110 111 /** 112 * @brief useNewLayoutSystem 113 * Be very careful activating the new layout system, 114 * its still experimental and works only if the user knows 115 * what he is doing. The reason is that the system does not prevent 116 * the user from creating sharing graphs that are not layoutable in a 117 * plane and still needs assistance from the user. 118 */ 119 bool useNewLayoutSystem() const; 120 void setUseNewLayoutSystem( bool value ); 121 122 /** 123 \brief Specify the frame attributes to be used, by default is it a thin black line. 124 125 To hide the frame line, you could do something like this: 126 \verbatim 127 KChart::FrameAttributes frameAttrs( my_chart->frameAttributes() ); 128 frameAttrs.setVisible( false ); 129 my_chart->setFrameAttributes( frameAttrs ); 130 \endverbatim 131 132 \sa setBackgroundAttributes 133 */ 134 void setFrameAttributes( const FrameAttributes &a ); 135 FrameAttributes frameAttributes() const; 136 137 /** 138 \brief Specify the background attributes to be used, by default there is no background. 139 140 To set a light blue background, you could do something like this: 141 \verbatim 142 KChart::BackgroundAttributes backgroundAttrs( my_chart->backgroundAttributes() ); 143 backgroundAttrs.setVisible( true ); 144 backgroundAttrs.setBrush( QColor(0xd0,0xd0,0xff) ); 145 my_chart->setBackgroundAttributes( backgroundAttrs ); 146 \endverbatim 147 148 \sa setFrameAttributes 149 */ 150 void setBackgroundAttributes( const BackgroundAttributes &a ); 151 BackgroundAttributes backgroundAttributes() const; 152 153 /** 154 * Each chart must have at least one coordinate plane. 155 * Initially a default CartesianCoordinatePlane is created. 156 * Use replaceCoordinatePlane() to replace it with a different 157 * one, such as a PolarCoordinatePlane. 158 * @return The first coordinate plane of the chart. 159 */ 160 AbstractCoordinatePlane* coordinatePlane(); 161 162 /** 163 * The list of coordinate planes. 164 * @return The list of coordinate planes. 165 */ 166 CoordinatePlaneList coordinatePlanes(); 167 168 /** 169 * Adds a coordinate plane to the chart. The chart takes ownership. 170 * @param plane The coordinate plane to add. 171 * 172 * \sa replaceCoordinatePlane, takeCoordinatePlane 173 */ 174 void addCoordinatePlane( AbstractCoordinatePlane* plane ); 175 176 /** 177 * Inserts a coordinate plane to the chart at index @p index. 178 * The chart takes ownership. 179 * 180 * @param index The index where to add the plane 181 * @param plane The coordinate plane to add. 182 * 183 * \sa replaceCoordinatePlane, takeCoordinatePlane 184 */ 185 void insertCoordinatePlane( int index, AbstractCoordinatePlane* plane ); 186 187 /** 188 * Replaces the old coordinate plane, or appends the 189 * plane, it there is none yet. 190 * 191 * @param plane The coordinate plane to be used instead of the old plane. 192 * This parameter must not be zero, or the method will do nothing. 193 * 194 * @param oldPlane The coordinate plane to be removed by the new plane. This 195 * plane will be deleted automatically. If the parameter is omitted, 196 * the very first coordinate plane will be replaced. In case, there was no 197 * plane yet, the new plane will just be added. 198 * 199 * \note If you want to re-use the old coordinate plane, call takeCoordinatePlane and 200 * addCoordinatePlane, instead of using replaceCoordinatePlane. 201 * 202 * \sa addCoordinatePlane, takeCoordinatePlane 203 */ 204 void replaceCoordinatePlane( AbstractCoordinatePlane* plane, 205 AbstractCoordinatePlane* oldPlane = nullptr ); 206 207 /** 208 * Removes the coordinate plane from the chart, without deleting it. 209 * 210 * The chart no longer owns the plane, so it is 211 * the caller's responsibility to delete the plane. 212 * 213 * \sa addCoordinatePlane, takeCoordinatePlane 214 */ 215 void takeCoordinatePlane( AbstractCoordinatePlane* plane ); 216 217 /** 218 * Set the coordinate plane layout that should be used as model for 219 * the internal used layout. The layout needs to be an instance of 220 * QHBoxLayout or QVBoxLayout. 221 */ 222 void setCoordinatePlaneLayout( QLayout * layout ); 223 QLayout* coordinatePlaneLayout(); 224 225 /** 226 * The first header or footer of the chart. By default there is none. 227 * @return The first header or footer of the chart or 0 if there was none 228 * added to the chart. 229 */ 230 HeaderFooter* headerFooter(); 231 232 /** 233 * The list of headers and footers associated with the chart. 234 * @return The list of headers and footers associated with the chart. 235 */ 236 HeaderFooterList headerFooters(); 237 238 /** 239 * Adds a header or a footer to the chart. The chart takes ownership. 240 * @param headerFooter The header (or footer, resp.) to add. 241 * 242 * \sa replaceHeaderFooter, takeHeaderFooter 243 */ 244 void addHeaderFooter( HeaderFooter* headerFooter ); 245 246 /** 247 * Replaces the old header (or footer, resp.), or appends the 248 * new header or footer, it there is none yet. 249 * 250 * @param headerFooter The header or footer to be used instead of the old one. 251 * This parameter must not be zero, or the method will do nothing. 252 * 253 * @param oldHeaderFooter The header or footer to be removed by the new one. This 254 * header or footer will be deleted automatically. If the parameter is omitted, 255 * the very first header or footer will be replaced. In case, there was no 256 * header and no footer yet, the new header or footer will just be added. 257 * 258 * \note If you want to re-use the old header or footer, call takeHeaderFooter and 259 * addHeaderFooter, instead of using replaceHeaderFooter. 260 * 261 * \sa addHeaderFooter, takeHeaderFooter 262 */ 263 void replaceHeaderFooter ( HeaderFooter* headerFooter, 264 HeaderFooter* oldHeaderFooter = nullptr ); 265 266 /** 267 * Removes the header (or footer, resp.) from the chart, without deleting it. 268 * 269 * The chart no longer owns the header or footer, so it is 270 * the caller's responsibility to delete the header or footer. 271 * 272 * \sa addHeaderFooter, replaceHeaderFooter 273 */ 274 void takeHeaderFooter( HeaderFooter* headerFooter ); 275 276 /** 277 * The first legend of the chart or 0 if there was none added to the chart. 278 * @return The first legend of the chart or 0 if none exists. 279 */ 280 Legend* legend(); 281 282 /** 283 * The list of all legends associated with the chart. 284 * @return The list of all legends associated with the chart. 285 */ 286 LegendList legends(); 287 288 /** 289 * Add the given legend to the chart. The chart takes ownership. 290 * @param legend The legend to add. 291 * 292 * \sa replaceLegend, takeLegend 293 */ 294 void addLegend( Legend* legend ); 295 296 /** 297 * Replaces the old legend, or appends the 298 * new legend, it there is none yet. 299 * 300 * @param legend The legend to be used instead of the old one. 301 * This parameter must not be zero, or the method will do nothing. 302 * 303 * @param oldLegend The legend to be removed by the new one. This 304 * legend will be deleted automatically. If the parameter is omitted, 305 * the very first legend will be replaced. In case, there was no 306 * legend yet, the new legend will just be added. 307 * 308 * If you want to re-use the old legend, call takeLegend and 309 * addLegend, instead of using replaceLegend. 310 * 311 * \note Whenever addLegend is called the font sizes used by the 312 * Legend are set to relative and they get coupled to the Chart's size, 313 * with their relative values being 20 for the item texts and 24 to the 314 * title text. So if you want to use custom font sizes for the Legend 315 * make sure to set them after calling addLegend. 316 * 317 * \sa addLegend, takeLegend 318 */ 319 void replaceLegend ( Legend* legend, Legend* oldLegend = nullptr ); 320 321 /** 322 * Removes the legend from the chart, without deleting it. 323 * 324 * The chart no longer owns the legend, so it is 325 * the caller's responsibility to delete the legend. 326 * 327 * \sa addLegend, takeLegend 328 */ 329 void takeLegend( Legend* legend ); 330 331 /** 332 * Set the padding between the margin of the widget and the area that 333 * the contents are drawn into. 334 * @param left The padding on the left side. 335 * @param top The padding at the top. 336 * @param right The padding on the left hand side. 337 * @param bottom The padding on the bottom. 338 * 339 * \note Using previous versions of KD Chart you might have called 340 * setGlobalLeading() to make room for long Abscissa labels (or for an 341 * overlapping top label of an Ordinate axis, resp.) that would not fit 342 * into the normal axis area. This is \em no \em longer \em needed 343 * because KD Chart now is using hidden auto-spacer items reserving 344 * as much free space as is needed for axes with overlaping content 345 * at the respective sides. 346 * 347 * \sa setGlobalLeadingTop, setGlobalLeadingBottom, setGlobalLeadingLeft, setGlobalLeadingRight 348 * \sa globalLeadingTop, globalLeadingBottom, globalLeadingLeft, globalLeadingRight 349 */ 350 void setGlobalLeading( int left, int top, int right, int bottom ); 351 352 /** 353 * Set the padding between the start of the widget and the start 354 * of the area that is used for drawing on the left. 355 * @param leading The padding value. 356 * 357 * \sa setGlobalLeading 358 */ 359 void setGlobalLeadingLeft( int leading ); 360 361 /** 362 * The padding between the start of the widget and the start 363 * of the area that is used for drawing on the left. 364 * @return The padding between the start of the widget and the start 365 * of the area that is used for drawing on the left. 366 * 367 * \sa setGlobalLeading 368 */ 369 int globalLeadingLeft() const; 370 371 /** 372 * Set the padding between the start of the widget and the start 373 * of the area that is used for drawing at the top. 374 * @param leading The padding value. 375 * 376 * \sa setGlobalLeading 377 */ 378 void setGlobalLeadingTop( int leading ); 379 380 /** 381 * The padding between the start of the widget and the start 382 * of the area that is used for drawing at the top. 383 * @return The padding between the start of the widget and the start 384 * of the area that is used for drawing at the top. 385 * 386 * \sa setGlobalLeading 387 */ 388 int globalLeadingTop() const; 389 390 /** 391 * Set the padding between the start of the widget and the start 392 * of the area that is used for drawing on the right. 393 * @param leading The padding value. 394 * 395 * \sa setGlobalLeading 396 */ 397 void setGlobalLeadingRight( int leading ); 398 399 /** 400 * The padding between the start of the widget and the start 401 * of the area that is used for drawing on the right. 402 * @return The padding between the start of the widget and the start 403 * of the area that is used for drawing on the right. 404 * 405 * \sa setGlobalLeading 406 */ 407 int globalLeadingRight() const; 408 409 /** 410 * Set the padding between the start of the widget and the start 411 * of the area that is used for drawing on the bottom. 412 * @param leading The padding value. 413 * 414 * \sa setGlobalLeading 415 */ 416 void setGlobalLeadingBottom( int leading ); 417 418 /** 419 * The padding between the start of the widget and the start 420 * of the area that is used for drawing at the bottom. 421 * @return The padding between the start of the widget and the start 422 * of the area that is used for drawing at the bottom. 423 * 424 * \sa setGlobalLeading 425 */ 426 int globalLeadingBottom() const; 427 428 /** 429 * Paints all the contents of the chart. Use this method to make KChart 430 * draw into your QPainter. 431 * 432 * \note Any global leading settings will be used by the paint method too, 433 * so make sure to set them to zero, if you want the drawing to have the exact 434 * size of the target rectangle. 435 * 436 * \param painter The painter to be drawn into. 437 * \param rect The rectangle to be filled by the Chart's drawing. 438 * 439 * \sa setGlobalLeading 440 */ 441 void paint( QPainter* painter, const QRect& rect ); 442 443 void reLayoutFloatingLegends(); 444 445 Q_SIGNALS: 446 /** Emitted upon change of a property of the Chart or any of its components. */ 447 void propertiesChanged(); 448 void finishedDrawing(); 449 450 protected: 451 /** 452 * Adjusts the internal layout when the chart is resized. 453 */ 454 /* reimp */ void resizeEvent ( QResizeEvent * event ) override; 455 456 /** 457 * @brief Draws the background and frame, then calls paint(). 458 * 459 * In most cases there is no need to override this method in a derived 460 * class, but if you do, do not forget to call paint(). 461 * @sa paint 462 */ 463 /* reimp */ void paintEvent( QPaintEvent* event ) override; 464 465 /** reimp */ 466 void mousePressEvent( QMouseEvent* event ) override; 467 /** reimp */ 468 void mouseDoubleClickEvent( QMouseEvent* event ) override; 469 /** reimp */ 470 void mouseMoveEvent( QMouseEvent* event ) override; 471 /** reimp */ 472 void mouseReleaseEvent( QMouseEvent* event ) override; 473 /** reimp */ 474 bool event( QEvent* event ) override; 475 476 private: 477 // TODO move this to the private class 478 void addLegendInternal( Legend *legend, bool setMeasures ); 479 }; 480 481 // Here we have a few docu block to be included into the API documentation: 482 /** 483 * \dir src 484 * \brief Implementation directory of KChart. 485 * 486 * This directory contains the header files and the source files of both, 487 * the private and the public classes. 488 * 489 * \note Only classes that have an include wrapper in the \c $KCHARTDIR/include 490 * directory are part of the supported API. 491 * All other classes are to be considered as implemntation details, they 492 * could be changed in future versions of KChart without notice. 493 * 494 * In other words: No class that is not mentioned in the \c $KCHARTDIR/include 495 * directory may be directly used by your application. 496 * 497 * The recommended way to include classes of the KChart API is including 498 * them by class name, so instead of including KChartChart.h you would say: 499 * 500 \verbatim 501 #include <KChartChart> 502 \endverbatim 503 * 504 * When following this there is no reason to include the \c $KCHARTDIR/src 505 * directory, it is sufficient to include \c $KCHARTDIR/include 506 */ 507 } 508 /** 509 * @class QAbstractItemView "(do not include)" 510 * @brief Class only listed here to document inheritance of some KChart classes. 511 * 512 * Please consult the respective Qt documentation for details: 513 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 514 */ 515 /** 516 * @class QAbstractProxyModel "(do not include)" 517 * @brief Class only listed here to document inheritance of some KChart classes. 518 * 519 * Please consult the respective Qt documentation for details: 520 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 521 */ 522 /** 523 * @class QFrame "(do not include)" 524 * @brief Class only listed here to document inheritance of some KChart classes. 525 * 526 * Please consult the respective Qt documentation for details: 527 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 528 */ 529 /** 530 * @class QObject "(do not include)" 531 * @brief Class only listed here to document inheritance of some KChart classes. 532 * 533 * Please consult the respective Qt documentation for details: 534 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 535 */ 536 /** 537 * @class QSortFilterProxyModel "(do not include)" 538 * @brief Class only listed here to document inheritance of some KChart classes. 539 * 540 * Please consult the respective Qt documentation for details: 541 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 542 */ 543 /** 544 * @class QWidget "(do not include)" 545 * @brief Class only listed here to document inheritance of some KChart classes. 546 * 547 * Please consult the respective Qt documentation for details: 548 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 549 */ 550 /** 551 * @class QTextDocument "(do not include)" 552 * @brief Class only listed here to document inheritance of some KChart classes. 553 * 554 * Please consult the respective Qt documentation for details: 555 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 556 */ 557 /** 558 * @class QLayoutItem "(do not include)" 559 * @brief Class only listed here to document inheritance of some KChart classes. 560 * 561 * Please consult the respective Qt documentation for details: 562 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 563 */ 564 /** 565 * @class QGraphicsPolygonItem "(do not include)" 566 * @brief Class only listed here to document inheritance of some KChart classes. 567 * 568 * Please consult the respective Qt documentation for details: 569 * <A HREF="http://doc.trolltech.com/">http://doc.trolltech.com/</A> 570 */ 571 572 573 #endif 574