KIGFX::ZOOM_CONTROLLER Class Reference

Handle the response of the zoom scale to external inputs. More...

#include <zoom_controller.h>

Inheritance diagram for KIGFX::ZOOM_CONTROLLER:

Public Member Functions
virtual	~ZOOM_CONTROLLER ()=default
virtual double	GetScaleForRotation (int aRotation, int aWheelDelta=0)=0
	Get the scale factor produced by a given mousewheel rotation.

Detailed Description

Handle the response of the zoom scale to external inputs.

Definition at line 39 of file zoom_controller.h.

Constructor & Destructor Documentation

~ZOOM_CONTROLLER()

virtual KIGFX::ZOOM_CONTROLLER::~ZOOM_CONTROLLER ( )

virtualdefault

Member Function Documentation

GetScaleForRotation()

virtual double KIGFX::ZOOM_CONTROLLER::GetScaleForRotation ( int aRotation, int aWheelDelta = 0 )

pure virtual

Get the scale factor produced by a given mousewheel rotation.

Parameters

aRotation	rotation of the mouse wheel (this comes from wxMouseEvent::GetWheelRotation()).
aWheelDelta	rotation of one wheel notch (wxMouseEvent::GetWheelDelta()), which zooms once per notch of a merged event, or 0 when the rotation is a scroll distance and is only capped.

Returns

the scale factor to scroll by.

Implemented in KIGFX::ACCELERATING_ZOOM_CONTROLLER, and KIGFX::CONSTANT_ZOOM_CONTROLLER.

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The documentation for this class was generated from the following file:

• zoom_controller.h