legato_widget_slider.h

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/*******************************************************************************
 Module for Microchip Graphics Library - Legato User Interface Library
 
  Company:
    Microchip Technology Inc.
 
  File Name:
    legato_widget_slider.h
 
  Summary:
 
  Description:
    This module implements slider control widget functions.
*******************************************************************************/
 
#ifndef LEGATO_SLIDER_H
#define LEGATO_SLIDER_H
 
#include "gfx/legato/common/legato_common.h"
 
#if LE_SLIDER_WIDGET_ENABLED
 
#include "gfx/legato/widget/legato_widget.h"
#include "gfx/legato/string/legato_string.h"
 
// *****************************************************************************
// *****************************************************************************
// Section: Data Types and Constants
// *****************************************************************************
// *****************************************************************************
 
// *****************************************************************************
/* Enumeration:
    leSliderState
 
  Summary:
    Describes various slider states
 
  Description:
 
 
  Remarks:
    None.
*/
typedef enum leSliderState
{
    LE_SLIDER_STATE_NONE,
    LE_SLIDER_STATE_HANDLE_DOWN,
    LE_SLIDER_STATE_AREA_DOWN
} leSliderState;
 
typedef struct leSliderWidget leSliderWidget;
 
// *****************************************************************************
/* Function Pointer:
    leSliderWidget_ValueChangedEvent
 
  Summary:
    Value changed event function callback type
*/
typedef void (*leSliderWidget_ValueChangedEvent)(leSliderWidget*);
 
/* internal use only */typedef struct leSliderWidget leSliderWidget;
 
#define LE_SLIDERWIDGET_VTABLE(THIS_TYPE) \
    LE_WIDGET_VTABLE(THIS_TYPE) \
    \
    leOrientation (*getOrientation)(const THIS_TYPE* _this); \
    leResult  (*setOrientation)(THIS_TYPE* _this, leOrientation align, leBool swapDimensions); \
    uint32_t  (*getGripSize)(const THIS_TYPE* _this); \
    leResult  (*setGripSize)(THIS_TYPE* _this, uint32_t sz); \
    uint32_t  (*getMininumValue)(const THIS_TYPE* _this); \
    leResult  (*setMinimumValue)(THIS_TYPE* _this, uint32_t min); \
    uint32_t  (*getMaximumValue)(const THIS_TYPE* _this); \
    leResult  (*setMaximumValue)(THIS_TYPE* _this, uint32_t max); \
    uint32_t  (*getPercentage)(const THIS_TYPE* _this); \
    leResult  (*setPercentage)(THIS_TYPE* _this, uint32_t per); \
    int32_t   (*getValue)(const THIS_TYPE* _this); \
    leResult  (*setValue)(THIS_TYPE* _this, int32_t val); \
    leResult  (*step)(THIS_TYPE* _this, int32_t amt); \
    leSliderWidget_ValueChangedEvent (*getValueChangedEventCallback)(const THIS_TYPE* _this); \
    leResult  (*setValueChangedEventCallback)(THIS_TYPE* _this, leSliderWidget_ValueChangedEvent cb);
    
typedef struct leSliderWidgetVTable
{
    LE_SLIDERWIDGET_VTABLE(leSliderWidget)
} leSliderWidgetVTable; 
 
typedef struct leSliderWidget
{
    leWidget widget; // widget base class
 
    const leSliderWidgetVTable* fn;
 
    leSliderState state; // slider state
    leOrientation alignment; // slider alignment
 
    int32_t min; // slider min value
    int32_t max; // slider max value
    int32_t value; // slider current value
    uint32_t grip; // slider grip size
 
    leSliderWidget_ValueChangedEvent valueChangedEvent; // value changed event
 
    lePoint handleDownOffset;
} leSliderWidget;
 
// *****************************************************************************
// *****************************************************************************
// Section: Routines
// *****************************************************************************
// *****************************************************************************
 
// *****************************************************************************
/* Function:
    leSliderWidget* leSliderWidget_New()
 
  Summary:
    Allocates memory for a new widget of this type.  The application is
    responsible for the managment of this memory until the widget is added to
    a widget tree.
 
  Description:
 
 
  Parameters:
 
  Returns:
    leSliderWidget*
 
  Remarks:
    Use leWidget_Delete() to free this pointer.
*/
LIB_EXPORT leSliderWidget* leSliderWidget_New();
 
LIB_EXPORT void leSliderWidget_Constructor(leSliderWidget* sld);
 
 
#ifdef _DOXYGEN_
#define THIS_TYPE struct leWidget
 
// *****************************************************************************
/* Virtual Member Function:
    leOrientation getOrientation(const leSliderWidget* _this)
 
  Summary:
     Gets the slider orientation
 
  Description:
     Gets the slider orientation
 
  Parameters:
    const leSliderWidget* _this - The Slider widget to operate on
 
  Remarks:
    Usage - _this->fn->getOrientation(_this);
 
  Returns:
    leOrientation - the orientation value
*/
leOrientation getOrientation(const leSliderWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult
setOrientation(leSliderWidget* _this,
                            leOrientation align,
                            leBool swapDimensions)
  Summary:
     Sets the slider orientation
 
  Description:
     Sets the slider orientation
 
  Parameters:
    leSliderWidget* _this - The Slider widget to operate on
    leOrientation align - the orientation value
    leBool swapDimensions - swap the width and height values when changing this
 
  Remarks:
    Usage - _this->fn->setOrientation(_this, align, swapDimensions);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setOrientation(leSliderWidget* _this,
                                leOrientation align,
                                leBool swapDimensions);
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getMaximumValue(const leSliderWidget* _this)
 
  Summary:
     Gets the minimum slider value
 
  Description:
     Gets the minimum slider value
 
  Parameters:
    const leSliderWidget* _this - The Slider widget to operate on
 
  Remarks:
    Usage - _this->fn->getMaximumValue(_this);
 
  Returns:
    uint32_t - the value
*/
virtual uint32_t getMaximumValue(const leSliderWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setMaximumValue(leSliderWidget* _this,
                             uint32_t val)
 
  Summary:
     Sets the minimum slider value
 
  Description:
     Sets the minimum slider value
 
  Parameters:
    leSliderWidget* _this - The Slider widget to operate on
    uint32_t val - the value
 
  Remarks:
    Usage - _this->fn->setMaximumValue(_this, val);
 
  Returns:
    leResult - the result of the operation
*/
leResult setMaximumValue(leSliderWidget* _this,
                         uint32_t val);
 
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getMaximumValue(const leSliderWidget* _this)
 
  Summary:
     Gets the maximum slider value
 
  Description:
     Gets the maximum slider value
 
  Parameters:
    const leSliderWidget* _this - The Slider widget to operate on
 
  Remarks:
    Usage - _this->fn->getMaximumValue(_this);
 
  Returns:
    uint32_t - the value
*/
virtual uint32_t getMaximumValue(const leSliderWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setMaximumValue(leSliderWidget* _this,
                             uint32_t val)
 
  Summary:
     Sets the maximum slider value
 
  Description:
     Sets the maximum slider value
 
  Parameters:
    leSliderWidget* _this - The Slider widget to operate on
    uint32_t val - the value
 
  Remarks:
    Usage - _this->fn->setMaximumValue(_this, val);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setMaximumValue(leSliderWidget* _this,
                                 uint32_t val);
 
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getPercentage(const leSliderWidget* _this)
 
  Summary:
     Gets the value as a percentage
 
  Description:
     Gets the value as a percentage
 
  Parameters:
    const leSliderWidget* _this - The Slider widget to operate on
 
  Remarks:
    Usage - _this->fn->getPercentage(_this);
 
  Returns:
    uint32_t - the percentage value
*/
virtual uint32_t getPercentage(const leSliderWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setPercentage(leSliderWidget* _this,
                           uint32_t val)
 
  Summary:
     Sets the value using a percentage
 
  Description:
     Sets the value using a percentage
 
  Parameters:
    leSliderWidget* _this - The Slider widget to operate on
    uint32_t val - the value
 
  Remarks:
    Usage - _this->fn->setPercentage(_this, val);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setPercentage(leSliderWidget* _this,
                               uint32_t val);
 
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getValue(const leSliderWidget* _this)
 
  Summary:
     Gets the slider value
 
  Description:
     Gets the slider value
 
  Parameters:
    const leSliderWidget* _this - The Slider widget to operate on
 
  Remarks:
    Usage - _this->fn->getValue(_this);
 
  Returns:
    uint32_t - the value
*/
virtual uint32_t getValue(const leSliderWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setValue(leSliderWidget* _this,
                      uint32_t val)
 
  Summary:
     Sets the slider value
 
  Description:
     Sets the slider value
 
  Parameters:
    leSliderWidget* _this - The Slider widget to operate on
    uint32_t val - the value
 
  Remarks:
    Usage - _this->fn->setValue(_this, val);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setPercentage(leSliderWidget* _this,
                               uint32_t val);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult step(leSliderWidget* _this,
                  int32_t amt)
 
  Summary:
     Step the slider by an amount
 
  Description:
     Step the slider by an amount
 
  Parameters:
    leSliderWidget* _this - The Slider widget to operate on
    int32_t amt - the step amount
 
  Remarks:
    Usage - _this->fn->step(_this, amt);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult step(leSliderWidget* _this,
                      int32_t amt);
 
virtual leSliderWidget_ValueChangedEvent getValueChangedEventCallback
                                          (const leSliderWidget* _this);
 
virtual leResult setValueChangedEventCallback(leSliderWidget* _this,
                                              leSliderWidget_ValueChangedEvent cb);
 
#undef THIS_TYPE
#endif
 
 
 
 
#endif // LE_SLIDER_WIDGET_ENABLED
#endif /* LEGATO_SLIDER_H */