KIGFX::CONSTANT_ZOOM_CONTROLLER Class Reference

A CONSTANT_ZOOM_CONTROLLER that zooms by a fixed factor based only on the magnitude of the scroll wheel rotation. More...

#include <zoom_controller.h>

Inheritance diagram for KIGFX::CONSTANT_ZOOM_CONTROLLER:

Public Member Functions
	CONSTANT_ZOOM_CONTROLLER (double aScale)
double	GetScaleForRotation (int aRotation) override
	Get the scale factor produced by a given mousewheel rotation.

Static Public Attributes
static constexpr double	GTK3_SCALE = 0.002
	A suitable (magic) scale factor for GTK3 systems.
static constexpr double	MAC_SCALE = 0.01
	A suitable (magic) scale factor for Mac systems.
static constexpr double	MSW_SCALE = 0.005
	A suitable (magic) scale factor for Windows systems.
static constexpr double	MANUAL_SCALE_FACTOR = 0.001
	Multiplier for manual scale ssetting.

Private Attributes
double	m_scale
	The scale factor set by the constructor.

Detailed Description

A CONSTANT_ZOOM_CONTROLLER that zooms by a fixed factor based only on the magnitude of the scroll wheel rotation.

Definition at line 142 of file zoom_controller.h.

Constructor & Destructor Documentation

CONSTANT_ZOOM_CONTROLLER()

CONSTANT_ZOOM_CONTROLLER::CONSTANT_ZOOM_CONTROLLER

(

double

aScale

)

Parameters

aScale

a scaling parameter that adjusts the magnitude of the scroll. This factor might be dependent on the platform for comfort.

Definition at line 120 of file zoom_controller.cpp.

References m_scale.

Member Function Documentation

GetScaleForRotation()

double CONSTANT_ZOOM_CONTROLLER::GetScaleForRotation ( int aRotation )

overridevirtual

Get the scale factor produced by a given mousewheel rotation.

Parameters

aRotation

rotation of the mouse wheel (this comes from wxMouseEvent::GetWheelRotation()).

Returns

the scale factor to scroll by.

Implements KIGFX::ZOOM_CONTROLLER.

Definition at line 125 of file zoom_controller.cpp.

References m_scale, and traceZoomScroll.

Referenced by BOOST_AUTO_TEST_CASE().

Member Data Documentation

GTK3_SCALE

double KIGFX::CONSTANT_ZOOM_CONTROLLER::GTK3_SCALE = 0.002

staticconstexpr

A suitable (magic) scale factor for GTK3 systems.

Definition at line 154 of file zoom_controller.h.

Referenced by GetZoomControllerForPlatform().

m_scale

double KIGFX::CONSTANT_ZOOM_CONTROLLER::m_scale

private

The scale factor set by the constructor.

Definition at line 167 of file zoom_controller.h.

Referenced by CONSTANT_ZOOM_CONTROLLER(), and GetScaleForRotation().

MAC_SCALE

double KIGFX::CONSTANT_ZOOM_CONTROLLER::MAC_SCALE = 0.01

staticconstexpr

A suitable (magic) scale factor for Mac systems.

Definition at line 157 of file zoom_controller.h.

Referenced by GetZoomControllerForPlatform().

MANUAL_SCALE_FACTOR

double KIGFX::CONSTANT_ZOOM_CONTROLLER::MANUAL_SCALE_FACTOR = 0.001

staticconstexpr

Multiplier for manual scale ssetting.

Definition at line 163 of file zoom_controller.h.

Referenced by KIGFX::WX_VIEW_CONTROLS::LoadSettings().

MSW_SCALE

double KIGFX::CONSTANT_ZOOM_CONTROLLER::MSW_SCALE = 0.005

staticconstexpr

A suitable (magic) scale factor for Windows systems.

Definition at line 160 of file zoom_controller.h.

Referenced by GetZoomControllerForPlatform().

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

• zoom_controller.h
• zoom_controller.cpp