QGIS API Documentation 3.41.0-Master (57ec4277f5e)
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Contains settings and helpers relating to a render of a QgsLayoutItem. More...
#include <qgslayoutitem.h>
Public Member Functions | |
QgsLayoutItemRenderContext (const QgsLayoutItemRenderContext &other)=delete | |
QgsLayoutItemRenderContext (QgsRenderContext &context, double viewScaleFactor=1.0) | |
Constructor for QgsLayoutItemRenderContext. | |
QgsLayoutItemRenderContext & | operator= (const QgsLayoutItemRenderContext &other)=delete |
QgsRenderContext & | renderContext () |
Returns a reference to the context's render context. | |
const QgsRenderContext & | renderContext () const |
Returns a reference to the context's render context. | |
double | viewScaleFactor () const |
Returns the current view zoom (scale factor). | |
Contains settings and helpers relating to a render of a QgsLayoutItem.
Definition at line 42 of file qgslayoutitem.h.
QgsLayoutItemRenderContext::QgsLayoutItemRenderContext | ( | QgsRenderContext & | context, |
double | viewScaleFactor = 1.0 |
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Constructor for QgsLayoutItemRenderContext.
The renderContext parameter specifies a QgsRenderContext for use within the QgsLayoutItemRenderContext.
The viewScaleFactor gives the current view zoom (scale factor). It can be used to scale render graphics so that they always appear a constant size, regardless of the current view zoom.
Definition at line 41 of file qgslayoutitem.cpp.
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Returns a reference to the context's render context.
Note that the context's painter has been scaled so that painter units are pixels. Use the QgsRenderContext methods to convert from millimeters or other units to the painter's units.
Definition at line 67 of file qgslayoutitem.h.
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Returns a reference to the context's render context.
Note that the context's painter has been scaled so that painter units are pixels. Use the QgsRenderContext methods to convert from millimeters or other units to the painter's units.
Definition at line 77 of file qgslayoutitem.h.
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Returns the current view zoom (scale factor).
It can be used to scale render graphics so that they always appear a constant size, regardless of the current view zoom.
E.g. a value of 0.5 indicates that the view is zoomed out to 50% size, so rendered items must be scaled by 200% in order to have a constant visible size. A value of 2.0 indicates that the view is zoomed in 200%, so rendered items must be scaled by 50% in order to have a constant visible size.
Definition at line 89 of file qgslayoutitem.h.