QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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A legend node which renders a color ramp. More...
#include <qgscolorramplegendnode.h>
Public Member Functions | |
QgsColorRampLegendNode (QgsLayerTreeLayer *nodeLayer, QgsColorRamp *ramp, const QgsColorRampLegendNodeSettings &settings, double minimumValue, double maximumValue, QObject *parent=nullptr, const QString &key=QString(), const QString &parentKey=QString()) | |
Constructor for QgsColorRampLegendNode. | |
QgsColorRampLegendNode (QgsLayerTreeLayer *nodeLayer, QgsColorRamp *ramp, const QString &minimumLabel, const QString &maximumLabel, QObject *parent=nullptr, const QString &key=QString(), const QString &parentKey=QString()) | |
Constructor for QgsColorRampLegendNode. | |
QVariant | data (int role) const override |
Returns data associated with the item. Must be implemented in derived class. | |
QSizeF | drawSymbol (const QgsLegendSettings &settings, ItemContext *ctx, double itemHeight) const override |
Draws symbol on the left side of the item. | |
QSizeF | drawSymbolText (const QgsLegendSettings &settings, ItemContext *ctx, QSizeF symbolSize) const override |
Draws label on the right side of the item. | |
QJsonObject | exportSymbolToJson (const QgsLegendSettings &settings, const QgsRenderContext &context) const override |
Adds a symbol in base64 string within a JSON object with the key "icon". | |
QSize | iconSize () const |
Returns the icon size, which is how large the ramp will render in a layer tree widget. | |
const QgsColorRamp * | ramp () const |
Returns the color ramp used by the node. | |
void | setIconSize (QSize size) |
Set the icon size, which controls how large the ramp will render in a layer tree widget. | |
void | setSettings (const QgsColorRampLegendNodeSettings &settings) |
Sets the node's settings. | |
QgsColorRampLegendNodeSettings | settings () const |
Returns the node's settings. | |
Public Member Functions inherited from QgsLayerTreeModelLegendNode | |
virtual bool | columnBreak () const |
Returns whether a forced column break should occur before the node. | |
virtual ItemMetrics | draw (const QgsLegendSettings &settings, ItemContext *ctx) |
Entry point called from QgsLegendRenderer to do the rendering. | |
QJsonObject | exportToJson (const QgsLegendSettings &settings, const QgsRenderContext &context) |
Entry point called from QgsLegendRenderer to do the rendering in a JSON object. | |
virtual Qt::ItemFlags | flags () const |
Returns item flags associated with the item. Default implementation returns Qt::ItemIsEnabled. | |
virtual void | invalidateMapBasedData () |
Notification from model that information from associated map view has changed. | |
virtual bool | isEmbeddedInParent () const |
virtual bool | isScaleOK (double scale) const |
QgsLayerTreeLayer * | layerNode () const |
Returns pointer to the parent layer node. | |
QgsLayerTreeModel * | model () const |
Returns pointer to model owning this legend node. | |
virtual void | setColumnBreak (bool breakBeforeNode) |
Sets whether a forced column break should occur before the node. | |
virtual bool | setData (const QVariant &value, int role) |
Sets some data associated with the item. Default implementation does nothing and returns false . | |
virtual void | setEmbeddedInParent (bool embedded) |
virtual void | setUserLabel (const QString &userLabel) |
virtual void | setUserPatchSize (QSizeF size) |
Sets the user (overridden) size for the legend node. | |
virtual QString | userLabel () const |
virtual QSizeF | userPatchSize () const |
Returns the user (overridden) size for the legend node. | |
Additional Inherited Members | |
Public Types inherited from QgsLayerTreeModelLegendNode | |
enum class | CustomRole : int { RuleKey = Qt::UserRole , ParentRuleKey , NodeType , IsDataDefinedSize } |
Legend node data roles. More... | |
enum | NodeTypes { SimpleLegend , SymbolLegend , RasterSymbolLegend , ImageLegend , WmsLegend , DataDefinedSizeLegend , EmbeddedWidget , ColorRampLegend } |
Types of legend nodes. More... | |
Public Slots inherited from QgsLayerTreeModelLegendNode | |
void | checkAllItems () |
Checks all checkable items belonging to the same layer as this node. | |
void | toggleAllItems () |
Toggle all checkable items belonging to the same layer as this node. | |
void | uncheckAllItems () |
Unchecks all checkable items belonging to the same layer as this node. | |
Signals inherited from QgsLayerTreeModelLegendNode | |
void | dataChanged () |
Emitted on internal data change so the layer tree model can forward the signal to views. | |
void | sizeChanged () |
Emitted when the size of this node changes. | |
Protected Member Functions inherited from QgsLayerTreeModelLegendNode | |
QgsLayerTreeModelLegendNode (QgsLayerTreeLayer *nodeL, QObject *parent=nullptr) | |
Construct the node with pointer to its parent layer node. | |
QgsRenderContext * | createTemporaryRenderContext () const |
Returns a temporary context or nullptr if legendMapViewData are not valid. | |
Protected Attributes inherited from QgsLayerTreeModelLegendNode | |
bool | mColumnBreakBeforeNode = false |
bool | mEmbeddedInParent |
QgsLayerTreeLayer * | mLayerNode = nullptr |
QgsLegendPatchShape | mPatchShape |
QString | mUserLabel |
QSizeF | mUserSize |
A legend node which renders a color ramp.
Definition at line 32 of file qgscolorramplegendnode.h.
QgsColorRampLegendNode::QgsColorRampLegendNode | ( | QgsLayerTreeLayer * | nodeLayer, |
QgsColorRamp * | ramp, | ||
const QString & | minimumLabel, | ||
const QString & | maximumLabel, | ||
QObject * | parent = nullptr , |
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const QString & | key = QString() , |
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const QString & | parentKey = QString() |
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Constructor for QgsColorRampLegendNode.
nodeLayer | layer node |
ramp | color ramp to render in node. Ownership is transferred to the node. |
minimumLabel | label text to render for the minimum value in the ramp |
maximumLabel | label text to render for the maximum value in the ramp |
parent | attach a parent QObject to the legend node. |
key | rule key. optional identifier to allow a unique ID to be assigned to the node by a renderer (since QGIS 3.40) |
parentKey | rule key of parent (since QGIS 3.40) |
Definition at line 30 of file qgscolorramplegendnode.cpp.
QgsColorRampLegendNode::QgsColorRampLegendNode | ( | QgsLayerTreeLayer * | nodeLayer, |
QgsColorRamp * | ramp, | ||
const QgsColorRampLegendNodeSettings & | settings, | ||
double | minimumValue, | ||
double | maximumValue, | ||
QObject * | parent = nullptr , |
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const QString & | key = QString() , |
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const QString & | parentKey = QString() |
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Constructor for QgsColorRampLegendNode.
nodeLayer | layer node |
ramp | color ramp to render in node. Ownership is transferred to the node. |
settings | node settings |
minimumValue | value associated with minimum of ramp |
maximumValue | value associated with maximum of ramp |
parent | attach a parent QObject to the legend node. |
key | rule key. optional identifier to allow a unique ID to be assigned to the node by a renderer (since QGIS 3.40) |
parentKey | rule key of parent (since QGIS 3.40) |
Definition at line 42 of file qgscolorramplegendnode.cpp.
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overridevirtual |
Returns data associated with the item. Must be implemented in derived class.
Implements QgsLayerTreeModelLegendNode.
Definition at line 95 of file qgscolorramplegendnode.cpp.
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overridevirtual |
Draws symbol on the left side of the item.
settings | Legend layout configuration |
ctx | Context for rendering - may be nullptr if only doing layout without actual rendering |
itemHeight | Minimal height of the legend item - used for correct positioning when rendering |
Reimplemented from QgsLayerTreeModelLegendNode.
Definition at line 192 of file qgscolorramplegendnode.cpp.
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overridevirtual |
Draws label on the right side of the item.
settings | Legend layout configuration |
ctx | Context for rendering - may be nullptr if only doing layout without actual rendering |
symbolSize | Real size of the associated symbol - used for correct positioning when rendering |
Reimplemented from QgsLayerTreeModelLegendNode.
Definition at line 392 of file qgscolorramplegendnode.cpp.
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overridevirtual |
Adds a symbol in base64 string within a JSON object with the key "icon".
settings | Legend layout configuration |
context | Rendering context |
Reimplemented from QgsLayerTreeModelLegendNode.
Definition at line 488 of file qgscolorramplegendnode.cpp.
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inline |
Returns the icon size, which is how large the ramp will render in a layer tree widget.
Definition at line 87 of file qgscolorramplegendnode.h.
const QgsColorRamp * QgsColorRampLegendNode::ramp | ( | ) | const |
Returns the color ramp used by the node.
Definition at line 62 of file qgscolorramplegendnode.cpp.
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inline |
Set the icon size, which controls how large the ramp will render in a layer tree widget.
Definition at line 80 of file qgscolorramplegendnode.h.
void QgsColorRampLegendNode::setSettings | ( | const QgsColorRampLegendNodeSettings & | settings | ) |
Sets the node's settings.
Definition at line 72 of file qgscolorramplegendnode.cpp.
QgsColorRampLegendNodeSettings QgsColorRampLegendNode::settings | ( | ) | const |
Returns the node's settings.
Definition at line 67 of file qgscolorramplegendnode.cpp.