An arbitrary pixmap. More...
Public Functions | |
| QCPItemPixmap (QCustomPlot *parentPlot) | |
| QPixmap | pixmap () const |
| bool | scaled () const |
| Qt::AspectRatioMode | aspectRatioMode () const |
| Qt::TransformationMode | transformationMode () const |
| QPen | pen () const |
| QPen | selectedPen () const |
| void | setPixmap (const QPixmap &pixmap) |
| void | setScaled (bool scaled, Qt::AspectRatioMode aspectRatioMode=Qt::KeepAspectRatio, Qt::TransformationMode transformationMode=Qt::SmoothTransformation) |
| void | setPen (const QPen &pen) |
| void | setSelectedPen (const QPen &pen) |
| virtual double | selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const |
 Public Functions inherited from QCPAbstractItem | |
| QCPAbstractItem (QCustomPlot *parentPlot) | |
| bool | clipToAxisRect () const |
| QCPAxisRect * | clipAxisRect () const |
| bool | selectable () const |
| bool | selected () const |
| void | setClipToAxisRect (bool clip) |
| void | setClipAxisRect (QCPAxisRect *rect) |
| Q_SLOT void | setSelectable (bool selectable) |
| Q_SLOT void | setSelected (bool selected) |
| QList< QCPItemPosition * > | positions () const |
| QList< QCPItemAnchor * > | anchors () const |
| QCPItemPosition * | position (const QString &name) const |
| QCPItemAnchor * | anchor (const QString &name) const |
| bool | hasAnchor (const QString &name) const |
| Public Functions inherited from QCPLayerable | |
| QCPLayerable (QCustomPlot *plot, QString targetLayer=QString(), QCPLayerable *parentLayerable=0) | |
| bool | visible () const |
| QCustomPlot * | parentPlot () const |
| QCPLayerable * | parentLayerable () const |
| QCPLayer * | layer () const |
| bool | antialiased () const |
| void | setVisible (bool on) |
| Q_SLOT bool | setLayer (QCPLayer *layer) |
| bool | setLayer (const QString &layerName) |
| void | setAntialiased (bool enabled) |
| bool | realVisibility () const |
Public Members | |
| QCPItemPosition *const | topLeft |
| QCPItemPosition *const | bottomRight |
| QCPItemAnchor *const | top |
| QCPItemAnchor *const | topRight |
| QCPItemAnchor *const | right |
| QCPItemAnchor *const | bottom |
| QCPItemAnchor *const | bottomLeft |
| QCPItemAnchor *const | left |
Protected Types | |
| enum | AnchorIndex |
Protected Functions | |
| virtual void | draw (QCPPainter *painter) |
| virtual QPointF | anchorPixelPoint (int anchorId) const |
| void | updateScaledPixmap (QRect finalRect=QRect(), bool flipHorz=false, bool flipVert=false) |
| QRect | getFinalRect (bool *flippedHorz=0, bool *flippedVert=0) const |
| QPen | mainPen () const |
| Protected Functions inherited from QCPAbstractItem | |
| virtual QCP::Interaction | selectionCategory () const |
| virtual QRect | clipRect () const |
| virtual void | applyDefaultAntialiasingHint (QCPPainter *painter) const |
| virtual void | selectEvent (QMouseEvent *event, bool additive, const QVariant &details, bool *selectionStateChanged) |
| virtual void | deselectEvent (bool *selectionStateChanged) |
| double | distSqrToLine (const QPointF &start, const QPointF &end, const QPointF &point) const |
| double | rectSelectTest (const QRectF &rect, const QPointF &pos, bool filledRect) const |
| QCPItemPosition * | createPosition (const QString &name) |
| QCPItemAnchor * | createAnchor (const QString &name, int anchorId) |
| Protected Functions inherited from QCPLayerable | |
| virtual void | parentPlotInitialized (QCustomPlot *parentPlot) |
| void | initializeParentPlot (QCustomPlot *parentPlot) |
| void | setParentLayerable (QCPLayerable *parentLayerable) |
| bool | moveToLayer (QCPLayer *layer, bool prepend) |
| void | applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const |
Additional Inherited Members | |
| Signals inherited from QCPAbstractItem | |
| void | selectionChanged (bool selected) |
| void | selectableChanged (bool selectable) |
| Signals inherited from QCPLayerable | |
| void | layerChanged (QCPLayer *newLayer) |
Detailed Description
An arbitrary pixmap.
It has two positions, topLeft and bottomRight, which define the rectangle the pixmap will be drawn in. Depending on the scale setting (setScaled), the pixmap will be either scaled to fit the rectangle or be drawn aligned to the topLeft position.
If scaling is enabled and topLeft is further to the bottom/right than bottomRight (as shown on the right side of the example image), the pixmap will be flipped in the respective orientations.
Constructor & Destructor Documentation
| QCPItemPixmap::QCPItemPixmap | ( | QCustomPlot * | parentPlot | ) |
Creates a rectangle item and sets default values.
The constructed item can be added to the plot with QCustomPlot::addItem.
Member Function Documentation
| void QCPItemPixmap::setPixmap | ( | const QPixmap & | pixmap | ) |
Sets the pixmap that will be displayed.
| void QCPItemPixmap::setScaled | ( | bool | scaled, |
| Qt::AspectRatioMode | aspectRatioMode = Qt::KeepAspectRatio, |
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| Qt::TransformationMode | transformationMode = Qt::SmoothTransformation |
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| ) |
Sets whether the pixmap will be scaled to fit the rectangle defined by the topLeft and bottomRight positions.
| void QCPItemPixmap::setPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw a border around the pixmap.
- See Also
- setSelectedPen, setBrush
| void QCPItemPixmap::setSelectedPen | ( | const QPen & | pen | ) |
Sets the pen that will be used to draw a border around the pixmap when selected
- See Also
- setPen, setSelected
|
virtual |
This function is used to decide whether a click hits a layerable object or not.
pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.
If the object is represented not by single lines but by an area like a QCPItemText or the bars of a QCPBars plottable, a click inside the area should also be considered a hit. In these cases this function thus returns a constant value greater zero but still below the parent plot's selection tolerance. (typically the selectionTolerance multiplied by 0.99).
Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).
The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.
details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.
You may pass 0 as details to indicate that you are not interested in those selection details.
Implements QCPAbstractItem.
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protectedvirtual |
Draws this item with the provided painter.
The cliprect of the provided painter is set to the rect returned by clipRect before this function is called. The clipRect depends on the clipping settings defined by setClipToAxisRect and setClipAxisRect.
Implements QCPAbstractItem.
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protectedvirtual |
Returns the pixel position of the anchor with Id anchorId. This function must be reimplemented in item subclasses if they want to provide anchors (QCPItemAnchor).
For example, if the item has two anchors with id 0 and 1, this function takes one of these anchor ids and returns the respective pixel points of the specified anchor.
- See Also
- createAnchor
Reimplemented from QCPAbstractItem.
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protected |
Creates the buffered scaled image (mScaledPixmap) to fit the specified finalRect. The parameters flipHorz and flipVert control whether the resulting image shall be flipped horizontally or vertically. (This is used when topLeft is further to the bottom/right than bottomRight.)
This function only creates the scaled pixmap when the buffered pixmap has a different size than the expected result, so calling this function repeatedly, e.g. in the draw function, does not cause expensive rescaling every time.
If scaling is disabled, sets mScaledPixmap to a null QPixmap.
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protected |
Returns the final (tight) rect the pixmap is drawn in, depending on the current item positions and scaling settings.
The output parameters flippedHorz and flippedVert return whether the pixmap should be drawn flipped horizontally or vertically in the returned rect. (The returned rect itself is always normalized, i.e. the top left corner of the rect is actually further to the top/left than the bottom right corner). This is the case when the item position topLeft is further to the bottom/right than bottomRight.
If scaling is disabled, returns a rect with size of the original pixmap and the top left corner aligned with the item position topLeft. The position bottomRight is ignored.
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protected |
Returns the pen that should be used for drawing lines. Returns mPen when the item is not selected and mSelectedPen when it is.
The documentation for this class was generated from the following files:
- src/items/item-pixmap.h
- src/items/item-pixmap.cpp