QGIS API Documentation 3.41.0-Master (cea29feecf2)
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A layout multiframe subclass for HTML content. More...
#include <qgslayoutitemhtml.h>
Public Slots | |
void | loadHtml (bool useCache=false, const QgsExpressionContext *context=nullptr) |
Reloads the html source from the url and redraws the item. | |
void | recalculateFrameSizes () override |
Recalculates the frame sizes for the current viewport dimensions. | |
void | refreshDataDefinedProperty (QgsLayoutObject::DataDefinedProperty property=QgsLayoutObject::DataDefinedProperty::AllProperties) override |
Public Slots inherited from QgsLayoutMultiFrame | |
void | recalculateFrameRects () |
Forces a recalculation of all the associated frame's scene rectangles. | |
virtual void | recalculateFrameSizes () |
Recalculates the portion of the multiframe item which is shown in each of its component frames. | |
void | refresh () override |
Refreshes the multiframe, causing a recalculation of any property overrides. | |
virtual void | refreshDataDefinedProperty (QgsLayoutObject::DataDefinedProperty property=QgsLayoutObject::DataDefinedProperty::AllProperties) |
Refreshes a data defined property for the multi frame by reevaluating the property's value and redrawing the item with this new value. | |
void | update () |
Forces a redraw of all child frames. | |
Public Slots inherited from QgsLayoutObject | |
virtual void | refresh () |
Refreshes the object, causing a recalculation of any property overrides. | |
Public Member Functions | |
QgsLayoutItemHtml (QgsLayout *layout) | |
Constructor for QgsLayoutItemHtml, with the specified parent layout. | |
~QgsLayoutItemHtml () override | |
ContentMode | contentMode () const |
Returns the source mode for item's HTML content. | |
QString | displayName () const override |
Returns the multiframe display name. | |
bool | evaluateExpressions () const |
Returns whether html item will evaluate QGIS expressions prior to rendering the HTML content. | |
double | findNearbyPageBreak (double yPos) override |
Finds the optimal position to break a frame at. | |
QString | html () const |
Returns the HTML source displayed in the item if the item is using the QgsLayoutItemHtml::ManualHtml mode. | |
QIcon | icon () const override |
Returns the item's icon. | |
double | maxBreakDistance () const |
Returns the maximum distance allowed when calculating where to place page breaks in the html. | |
void | render (QgsLayoutItemRenderContext &context, const QRectF &renderExtent, int frameIndex) override |
Renders a portion of the multiframe's content into a render context. | |
void | setContentMode (ContentMode mode) |
Sets the source mode for item's HTML content. | |
void | setEvaluateExpressions (bool evaluateExpressions) |
Sets whether the html item will evaluate QGIS expressions prior to rendering the HTML content. | |
void | setHtml (const QString &html) |
Sets the html to display in the item when the item is using the QgsLayoutItemHtml::ManualHtml mode. | |
void | setMaxBreakDistance (double distance) |
Sets the maximum distance allowed when calculating where to place page breaks in the html. | |
void | setUrl (const QUrl &url) |
Sets the url for content to display in the item when the item is using the QgsLayoutItemHtml::Url mode. | |
void | setUserStylesheet (const QString &stylesheet) |
Sets the user stylesheet CSS rules to use while rendering the HTML content. | |
void | setUserStylesheetEnabled (bool enabled) |
Sets whether user stylesheets are enabled for the HTML content. | |
void | setUseSmartBreaks (bool useSmartBreaks) |
Sets whether the html item should use smart breaks. | |
QSizeF | totalSize () const override |
Returns the total size of the multiframe's content, in layout units. | |
int | type () const override |
Returns unique multiframe type id. | |
QUrl | url () const |
Returns the URL of the content displayed in the item if the item is using the QgsLayoutItemHtml::Url mode. | |
QString | userStylesheet () const |
Returns the user stylesheet CSS rules used while rendering the HTML content. | |
bool | userStylesheetEnabled () const |
Returns whether user stylesheets are enabled for the HTML content. | |
bool | useSmartBreaks () const |
Returns whether html item is using smart breaks. | |
Public Member Functions inherited from QgsLayoutMultiFrame | |
QgsLayoutMultiFrame (QgsLayout *layout) | |
Construct a new multiframe item, attached to the specified layout. | |
~QgsLayoutMultiFrame () override | |
virtual void | addFrame (QgsLayoutFrame *frame, bool recalcFrameSizes=true) |
Adds a frame to the multiframe. | |
void | beginCommand (const QString &commandText, UndoCommand command=UndoNone) |
Starts new undo command for this item. | |
void | cancelCommand () |
Cancels the current item command and discards it. | |
QgsAbstractLayoutUndoCommand * | createCommand (const QString &text, int id, QUndoCommand *parent=nullptr) override |
Creates a new layout undo command with the specified text and parent. | |
QgsExpressionContext | createExpressionContext () const override |
This method needs to be reimplemented in all classes which implement this interface and return an expression context. | |
QgsLayoutFrame * | createNewFrame (QgsLayoutFrame *currentFrame, QPointF pos, QSizeF size) |
Creates a new frame and adds it to the multi frame and layout. | |
void | deleteFrames () |
Removes and deletes all child frames. | |
void | endCommand () |
Completes the current item command and push it onto the layout's undo stack. | |
virtual void | finalizeRestoreFromXml () |
Called after all pending items have been restored from XML. | |
virtual QSizeF | fixedFrameSize (int frameIndex=-1) const |
Returns the fixed size for a frame, if desired. | |
QgsLayoutFrame * | frame (int index) const |
Returns the child frame at a specified index from the multiframe. | |
int | frameCount () const |
Returns the number of frames associated with this multiframe. | |
int | frameIndex (QgsLayoutFrame *frame) const |
Returns the index of a frame within the multiframe. | |
QList< QgsLayoutFrame * > | frames () const |
Returns a list of all child frames for this multiframe. | |
virtual QSizeF | minFrameSize (int frameIndex=-1) const |
Returns the minimum size for a frames, if desired. | |
bool | readXml (const QDomElement &itemElement, const QDomDocument &document, const QgsReadWriteContext &context, bool includeFrames=false) |
Sets the item state from a DOM element. | |
void | removeFrame (int index, bool removeEmptyPages=false) |
Removes a frame by index from the multiframe. | |
ResizeMode | resizeMode () const |
Returns the resize mode for the multiframe. | |
void | setResizeMode (ResizeMode mode) |
Sets the resize mode for the multiframe, and recalculates frame sizes to match. | |
QString | uuid () const |
Returns the multiframe identification string. | |
bool | writeXml (QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context, bool includeFrames=false) const |
Stores the multiframe state in a DOM element. | |
Public Member Functions inherited from QgsLayoutObject | |
QgsLayoutObject (QgsLayout *layout) | |
Constructor for QgsLayoutObject, with the specified parent layout. | |
QgsExpressionContext | createExpressionContext () const override |
Creates an expression context relating to the objects' current state. | |
QStringList | customProperties () const |
Returns list of keys stored in custom properties for the object. | |
QVariant | customProperty (const QString &key, const QVariant &defaultValue=QVariant()) const |
Read a custom property from the object. | |
QgsPropertyCollection & | dataDefinedProperties () |
Returns a reference to the object's property collection, used for data defined overrides. | |
const QgsPropertyCollection & | dataDefinedProperties () const |
Returns a reference to the object's property collection, used for data defined overrides. | |
QgsLayout * | layout () |
Returns the layout the object is attached to. | |
const QgsLayout * | layout () const |
Returns the layout the object is attached to. | |
void | removeCustomProperty (const QString &key) |
Remove a custom property from the object. | |
void | setCustomProperty (const QString &key, const QVariant &value) |
Set a custom property for the object. | |
void | setDataDefinedProperties (const QgsPropertyCollection &collection) |
Sets the objects's property collection, used for data defined overrides. | |
Public Member Functions inherited from QgsExpressionContextGenerator | |
virtual | ~QgsExpressionContextGenerator ()=default |
Public Member Functions inherited from QgsLayoutUndoObjectInterface | |
virtual | ~QgsLayoutUndoObjectInterface ()=default |
Static Public Member Functions | |
static QgsLayoutItemHtml * | create (QgsLayout *layout) |
Returns a new QgsLayoutItemHtml for the specified parent layout. | |
static QgsLayoutItemHtml * | createFromLabel (QgsLayoutItemLabel *label) |
Returns a new QgsLayoutItemHtml matching the content and rendering of a given label. | |
Static Public Member Functions inherited from QgsLayoutObject | |
static bool | propertyAssociatesWithParentMultiframe (DataDefinedProperty property) |
Returns true if the specified property key is normally associated with the parent QgsLayoutMultiFrame object instead of a child QgsLayoutFrame object. | |
static const QgsPropertiesDefinition & | propertyDefinitions () |
Returns the layout object property definitions. | |
Protected Member Functions | |
bool | readPropertiesFromElement (const QDomElement &itemElem, const QDomDocument &doc, const QgsReadWriteContext &context) override |
Sets multiframe state from a DOM element. | |
bool | writePropertiesToElement (QDomElement &elem, QDomDocument &doc, const QgsReadWriteContext &context) const override |
Stores multiframe state within an XML DOM element. | |
Protected Member Functions inherited from QgsLayoutObject | |
bool | readObjectPropertiesFromElement (const QDomElement &parentElement, const QDomDocument &document, const QgsReadWriteContext &context) |
Sets object properties from a DOM element. | |
bool | writeObjectPropertiesToElement (QDomElement &parentElement, QDomDocument &document, const QgsReadWriteContext &context) const |
Stores object properties within an XML DOM element. | |
Additional Inherited Members | |
Signals inherited from QgsLayoutMultiFrame | |
void | contentsChanged () |
Emitted when the contents of the multi frame have changed and the frames must be redrawn. | |
Signals inherited from QgsLayoutObject | |
void | changed () |
Emitted when the object's properties change. | |
Protected Attributes inherited from QgsLayoutMultiFrame | |
QList< QgsLayoutFrame * > | mFrameItems |
ResizeMode | mResizeMode = UseExistingFrames |
Protected Attributes inherited from QgsLayoutObject | |
QgsObjectCustomProperties | mCustomProperties |
Custom properties for object. | |
QgsPropertyCollection | mDataDefinedProperties |
QPointer< QgsLayout > | mLayout |
A layout multiframe subclass for HTML content.
Definition at line 36 of file qgslayoutitemhtml.h.
Source modes for the HTML content to render in the item.
Enumerator | |
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Url | Using this mode item fetches its content via a url. |
ManualHtml | HTML content is manually set for the item. |
Definition at line 43 of file qgslayoutitemhtml.h.
QgsLayoutItemHtml::QgsLayoutItemHtml | ( | QgsLayout * | layout | ) |
Constructor for QgsLayoutItemHtml, with the specified parent layout.
Ownership is transferred to the layout.
Definition at line 47 of file qgslayoutitemhtml.cpp.
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override |
Definition at line 85 of file qgslayoutitemhtml.cpp.
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inline |
Returns the source mode for item's HTML content.
Definition at line 87 of file qgslayoutitemhtml.h.
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static |
Returns a new QgsLayoutItemHtml for the specified parent layout.
Definition at line 100 of file qgslayoutitemhtml.cpp.
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static |
Returns a new QgsLayoutItemHtml matching the content and rendering of a given label.
Definition at line 105 of file qgslayoutitemhtml.cpp.
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overridevirtual |
Returns the multiframe display name.
Reimplemented from QgsLayoutMultiFrame.
Definition at line 523 of file qgslayoutitemhtml.cpp.
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inline |
Returns whether html item will evaluate QGIS expressions prior to rendering the HTML content.
If set, any content inside [% %] tags will be treated as a QGIS expression and evaluated against the current atlas feature.
Definition at line 132 of file qgslayoutitemhtml.h.
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overridevirtual |
Finds the optimal position to break a frame at.
yPos | maximum vertical position for break, in layout units. |
Reimplemented from QgsLayoutMultiFrame.
Definition at line 409 of file qgslayoutitemhtml.cpp.
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inline |
Returns the HTML source displayed in the item if the item is using the QgsLayoutItemHtml::ManualHtml mode.
Definition at line 123 of file qgslayoutitemhtml.h.
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overridevirtual |
Returns the item's icon.
Reimplemented from QgsLayoutMultiFrame.
Definition at line 95 of file qgslayoutitemhtml.cpp.
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slot |
Reloads the html source from the url and redraws the item.
useCache | set to true to use a cached copy of remote html content |
context | expression context for evaluating data defined urls and expressions in html |
Definition at line 160 of file qgslayoutitemhtml.cpp.
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inline |
Returns the maximum distance allowed when calculating where to place page breaks in the html.
This distance is the maximum amount of empty space allowed at the bottom of a frame after calculating the optimum break location. This setting is only effective if useSmartBreaks is true
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Definition at line 177 of file qgslayoutitemhtml.h.
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overrideprotectedvirtual |
Sets multiframe state from a DOM element.
element | is the DOM element for the multiframe |
document | DOM document |
context | read write context |
Note that item subclasses should not rely on all other items being present in the layout at the time this method is called. Instead, any connections and links to other items must be made in the finalizeRestoreFromXml() method. E.g. when restoring a scalebar, the connection to the linked map's signals should be implemented in finalizeRestoreFromXml(), not readPropertiesFromElement().
Reimplemented from QgsLayoutMultiFrame.
Definition at line 541 of file qgslayoutitemhtml.cpp.
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overrideslot |
Recalculates the frame sizes for the current viewport dimensions.
Definition at line 275 of file qgslayoutitemhtml.cpp.
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overrideslot |
Definition at line 619 of file qgslayoutitemhtml.cpp.
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overridevirtual |
Renders a portion of the multiframe's content into a render context.
context | destination render painter |
renderExtent | visible extent of content to render into the painter. |
frameIndex | frame number for content |
Implements QgsLayoutMultiFrame.
Definition at line 340 of file qgslayoutitemhtml.cpp.
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inline |
Sets the source mode for item's HTML content.
Definition at line 79 of file qgslayoutitemhtml.h.
void QgsLayoutItemHtml::setEvaluateExpressions | ( | bool | evaluateExpressions | ) |
Sets whether the html item will evaluate QGIS expressions prior to rendering the HTML content.
If set, any content inside [% %] tags will be treated as a QGIS expression and evaluated against the current atlas feature.
Definition at line 153 of file qgslayoutitemhtml.cpp.
void QgsLayoutItemHtml::setHtml | ( | const QString & | html | ) |
Sets the html to display in the item when the item is using the QgsLayoutItemHtml::ManualHtml mode.
Setting the HTML using this function does not automatically refresh the item's contents. Call loadHtml to trigger a refresh of the item after setting the HTML content.
Definition at line 144 of file qgslayoutitemhtml.cpp.
void QgsLayoutItemHtml::setMaxBreakDistance | ( | double | distance | ) |
Sets the maximum distance allowed when calculating where to place page breaks in the html.
This distance is the maximum amount of empty space allowed at the bottom of a frame after calculating the optimum break location. Setting a larger value will result in better choice of page break location, but more wasted space at the bottom of frames. This setting is only effective if useSmartBreaks is true
.
Definition at line 497 of file qgslayoutitemhtml.cpp.
void QgsLayoutItemHtml::setUrl | ( | const QUrl & | url | ) |
Sets the url for content to display in the item when the item is using the QgsLayoutItemHtml::Url mode.
Content is automatically fetched and the HTML item refreshed after calling this function.
Definition at line 132 of file qgslayoutitemhtml.cpp.
void QgsLayoutItemHtml::setUserStylesheet | ( | const QString & | stylesheet | ) |
Sets the user stylesheet CSS rules to use while rendering the HTML content.
These allow for overriding the styles specified within the HTML source. Setting the stylesheet using this function does not automatically refresh the item's contents. Call loadHtml to trigger a refresh of the item after setting the stylesheet rules.
Definition at line 504 of file qgslayoutitemhtml.cpp.
void QgsLayoutItemHtml::setUserStylesheetEnabled | ( | bool | enabled | ) |
Sets whether user stylesheets are enabled for the HTML content.
Definition at line 513 of file qgslayoutitemhtml.cpp.
void QgsLayoutItemHtml::setUseSmartBreaks | ( | bool | useSmartBreaks | ) |
Sets whether the html item should use smart breaks.
Smart breaks prevent the html frame contents from breaking mid-way though a line of text.
Definition at line 490 of file qgslayoutitemhtml.cpp.
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overridevirtual |
Returns the total size of the multiframe's content, in layout units.
Implements QgsLayoutMultiFrame.
Definition at line 335 of file qgslayoutitemhtml.cpp.
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overridevirtual |
Returns unique multiframe type id.
Implements QgsLayoutMultiFrame.
Definition at line 90 of file qgslayoutitemhtml.cpp.
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inline |
Returns the URL of the content displayed in the item if the item is using the QgsLayoutItemHtml::Url mode.
Definition at line 104 of file qgslayoutitemhtml.h.
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inline |
Returns the user stylesheet CSS rules used while rendering the HTML content.
These overriding the styles specified within the HTML source.
Definition at line 196 of file qgslayoutitemhtml.h.
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inline |
Returns whether user stylesheets are enabled for the HTML content.
Definition at line 210 of file qgslayoutitemhtml.h.
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inline |
Returns whether html item is using smart breaks.
Smart breaks prevent the html frame contents from breaking mid-way though a line of text.
Definition at line 148 of file qgslayoutitemhtml.h.
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overrideprotectedvirtual |
Stores multiframe state within an XML DOM element.
element | is the DOM element to store the multiframe's properties in |
document | DOM document |
context | read write context |
Reimplemented from QgsLayoutMultiFrame.
Definition at line 528 of file qgslayoutitemhtml.cpp.