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Extends the normal QGraphicsView for a scale and pan function which only effects children of "origin", children of "hud" are not affected.

Python 100.00%

qextendedgraphicsview's Introduction

QExtendedGraphicsView

QExtendedGraphicsView extends the QGraphicsView to feature panning (right mouse button) and zooming (mouse wheel) and extends it to feature HUD elements which are not affected by these transformations.

Interface

Important variables of the class

  • scene the QGraphicsScene object
  • origin a QGraphicsItem object which serves as the parent for all objects which should be affected by zoom and pan
  • hud a QGraphicsItem object which serves as parent for all objects whcih should not be affected by zoom and pan

Important functions of the class

  • fitInView() adjust the zoom and pan to show everything which is child of origin
  • getOriginScale() returns the scale of the zooming
  • mapSceneToOrigin(pos) maps the point pos from scene coordinates to the coordinate system of origin
  • mapToOrigin(pos) maps the point pos from view coordinates to the coordinate system of origin

Overloadable events

  • zoomEvent(self, scale, pos) is called when the zoom is changed
  • panEvent(self, x, y) is called when the pan is changed

Usage

Import with from QExtendedGraphicsView import QExtendedGraphicsView and create the view with QExtendedGraphicsView()

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