legato_widget_imagesequence.h

Go to the documentation of this file.

/*******************************************************************************
* Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries.
*
* Subject to your compliance with these terms, you may use Microchip software
* and any derivatives exclusively with Microchip products. It is your
* responsibility to comply with third party license terms applicable to your
* use of third party software (including open source software) that may
* accompany Microchip software.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
* EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE,
* INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND
* WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS
* BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE
* FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN
* ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
*******************************************************************************/
 
/*******************************************************************************
 Module for Microchip Graphics Library - Legato User Interface Library
 
  Company:
    Microchip Technology Inc.
 
  File Name:
    legato_widget_imagesequence.h
 
  Summary:
 
 
  Description:
    This module implements image sequence (slide show) widget drawing functions.
*******************************************************************************/
 
#ifndef LEGATO_IMAGESEQUENCE_H
#define LEGATO_IMAGESEQUENCE_H
 
#include "gfx/legato/common/legato_common.h"
 
#if LE_IMAGESEQUENCE_WIDGET_ENABLED
 
#include "gfx/legato/image/legato_image.h"
#include "gfx/legato/widget/legato_widget.h"
#include "gfx/legato/string/legato_string.h"
 
/* internal use only */
#define LE_IMAGESEQ_RESTART -1
 
typedef struct leImageSequenceWidget leImageSequenceWidget;
 
// *****************************************************************************
/* Function Pointer:
    leImageSequenceImageChangedEvent_FnPtr
 
  Summary:
    Image changed event function callback type
*/
typedef void (*leImageSequenceImageChangedEvent_FnPtr)(leImageSequenceWidget*);
 
// *****************************************************************************
// *****************************************************************************
// Section: Data Types and Constants
// *****************************************************************************
// *****************************************************************************
 
// *****************************************************************************
/* Enumeration:
    leImageSequenceEntry
 
  Summary:
    Image sequence entry definition
 
  Description:
    Defines a single entry for the image sequence widget
 
  Remarks:
    None.
*/
typedef struct leImageSequenceEntry
{
    const leImage* image; // image asset pointer
 
    uint32_t delay; // how many time units to display this entry
 
    leHAlignment halign; // the horizontal alignment for this entry
    leVAlignment valign; // the vertical alignment for this entry
} leImageSequenceEntry;
 
/* internal use only */
#define LE_IMAGESEQUENCEWIDGET_VTABLE(THIS_TYPE) \
    LE_WIDGET_VTABLE(THIS_TYPE) \
    \
    uint32_t      (*getImageCount)(const THIS_TYPE* _this); \
    leResult      (*setImageCount)(THIS_TYPE* _this, uint32_t cnt); \
    leImage*      (*getImage)(const THIS_TYPE* _this, uint32_t idx); \
    leResult      (*setImage)(THIS_TYPE* _this, uint32_t idx, const leImage* img); \
    uint32_t      (*getImageDelay)(const THIS_TYPE* _this, uint32_t idx); \
    leResult      (*setImageDelay)(THIS_TYPE* _this, uint32_t idx, uint32_t dly); \
    leHAlignment  (*getImageHAlignment)(const THIS_TYPE* _this, uint32_t idx); \
    leResult      (*setImageHAlignment)(THIS_TYPE* _this, uint32_t idx, leHAlignment align); \
    leVAlignment  (*getImageVAlignment)(const THIS_TYPE* _this, uint32_t idx); \
    leResult      (*setImageVAlignment)(THIS_TYPE* _this, uint32_t idx, leVAlignment align); \
    leResult      (*stop)(THIS_TYPE* _this); \
    leResult      (*play)(THIS_TYPE* _this); \
    leResult      (*rewind)(THIS_TYPE* _this); \
    leBool        (*isPlaying)(const THIS_TYPE* _this); \
    leBool        (*getRepeat)(const THIS_TYPE* _this); \
    leResult      (*setRepeat)(THIS_TYPE* _this, leBool rpt); \
    leResult      (*showImage)(THIS_TYPE* _this, uint32_t idx); \
    leResult      (*showNextImage)(THIS_TYPE* _this); \
    leResult      (*showPreviousImage)(THIS_TYPE* _this); \
    leImageSequenceImageChangedEvent_FnPtr (*getImageChangedEventCallback)(const THIS_TYPE* _this); \
    leResult      (*setImageChangedEventCallback)(THIS_TYPE* _this, leImageSequenceImageChangedEvent_FnPtr cb); \
    
typedef struct leImageSequenceWidgetVTable
{
    LE_IMAGESEQUENCEWIDGET_VTABLE(leImageSequenceWidget)
} leImageSequenceWidgetVTable; 
 
// *****************************************************************************
typedef struct leImageSequenceWidget
{
    leWidget widget; // widget base class
 
    const leImageSequenceWidgetVTable* fn;
 
    uint32_t count; // number of image entries for this widget
    leImageSequenceEntry* images; // image entry array
 
    int32_t activeIdx; // currently displayed entry
 
    leBool playing; // indicates that the widget is automatically cycling
    uint32_t time; // current cycle time
 
    leBool repeat; // indicates that the sequence should repeat when it
                   // reaches the end of the sequence
 
    leImageSequenceImageChangedEvent_FnPtr cb; // callback when the image changes
} leImageSequenceWidget;
 
// *****************************************************************************
// *****************************************************************************
// Section: Routines
// *****************************************************************************
// *****************************************************************************
 
LIB_EXPORT leImageSequenceWidget* leImageSequenceWidget_New();
 
LIB_EXPORT void leImageSequenceWidget_Constructor(leImageSequenceWidget* wgt);
 
#ifdef _DOXYGEN_
#define THIS_TYPE struct leWidget
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getImageCount(const leImageSequenceWidget* _this)
 
  Summary:
     Gets the image count
 
  Description:
     Gets the image count
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->getImageCount(_this);
 
  Returns:
    uint32_t - the image count
*/
virtual uint32_t getImageCount(const leImageSequenceWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setImageCount(leImageSequenceWidget* _this,
                           uint32_t cnt)
 
  Summary:
     Sets the image count
 
  Description:
     Sets the image count
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t cnt - the image count
 
  Remarks:
    Usage - _this->fn->setImageCount(_this, cnt);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setImageCount(leImageSequenceWidget* _this,
                               uint32_t cnt);
 
// *****************************************************************************
/* Virtual Member Function:
    leImage* getImage(const leImageSequenceWidget* _this,
                      uint32_t idx)
 
  Summary:
     Gets the image pointer
 
  Description:
     Gets the image pointer
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getImage(_this, idx);
 
  Returns:
    leImage* - the image pointer
*/
virtual leImage* getImage(const leImageSequenceWidget* _this,
                          uint32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setImage(leImageSequenceWidget* _this,
                      uint32_t idx,
                      const leImage* img)
 
  Summary:
     Sets the image pointer
 
  Description:
     Sets the image pointer
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
    const leImage* img - the image pointer
 
  Remarks:
    Usage - _this->fn->setImage(_this, idx, img);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setImage(leImageSequenceWidget* _this,
                          uint32_t idx,
                          const leImage* img);
 
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getImageDelay(const leImageSequenceWidget* _this,
                           uint32_t idx)
 
  Summary:
     Gets the image cycle delay
 
  Description:
     Gets the image cycle delay
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getImageDelay(_this, idx);
 
  Returns:
    uint32_t - the image delay
*/
virtual uint32_t getImageDelay(const leImageSequenceWidget* _this,
                               uint32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setImageDelay(leImageSequenceWidget* _this,
                           uint32_t idx,
                           uint32_t dly)
 
  Summary:
     Sets the image cycle delay
 
  Description:
     Sets the image cycle delay
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
    uint32_t dly - the image delay
 
  Remarks:
    Usage - _this->fn->setImageDelay(_this, idx, dly);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setImageDelay(leImageSequenceWidget* _this,
                               uint32_t idx,
                               uint32_t dly);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leHAlignment getImageHAlignment(const leImageSequenceWidget* _this,
                                    uint32_t idx)
 
  Summary:
     Gets the image horizontal alignment
 
  Description:
     Gets the image horizontal alignment
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getImageHAlignment(_this, idx);
 
  Returns:
    leHAlignment - the alignment
*/
virtual leHAlignment getImageHAlignment(const leImageSequenceWidget* _this,
                                        uint32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setImageHAlignment(leImageSequenceWidget* _this,
                                uint32_t idx,
                                leHAlignment align)
 
  Summary:
     Sets the image horizontal alignment
 
  Description:
     Sets the image horizontal alignment
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
    leHAlignment align - the alignment
 
  Remarks:
    Usage - _this->fn->setImageHAlignment(_this, idx, align);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setImageHAlignment(leImageSequenceWidget* _this,
                                    uint32_t idx,
                                    leHAlignment align);
 
// *****************************************************************************
/* Virtual Member Function:
    leVAlignment getImageVAlignment(const leImageSequenceWidget* _this,
                                    uint32_t idx)
 
  Summary:
     Gets the image vertical alignment
 
  Description:
     Gets the image vertical alignment
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getImageVAlignment(_this, idx);
 
  Returns:
    leVAlignment - the alignment
*/
virtual leVAlignment getImageVAlignment(const leImageSequenceWidget* _this,
                                        uint32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setImageVAlignment(leImageSequenceWidget* _this,
                                uint32_t idx,
                                leVAlignment align)
 
  Summary:
     Sets the image vertical alignment
 
  Description:
     Sets the image vertical alignment
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
    leVAlignment align - the alignment
 
  Remarks:
    Usage - _this->fn->setImageVAlignment(_this, idx, align);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setImageVAlignment(leImageSequenceWidget* _this,
                                    uint32_t idx,
                                    leVAlignment align);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult stop(leImageSequenceWidget* _this)
 
  Summary:
     Stops the sequence from automatically cycling
 
  Description:
     Stops the sequence from automatically cycling
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->stop(_this);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult stop(leImageSequenceWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult play(leImageSequenceWidget* _this)
 
  Summary:
     Starts the sequence automatic cycle
 
  Description:
     Starts the sequence automatic cycle
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->play(_this);
 
  Returns:
    leResult - the result of the operation
*/
leResult play(leImageSequenceWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult rewind(leImageSequenceWidget* _this)
 
  Summary:
     Returns the sequence to the first image
 
  Description:
     Returns the sequence to the first image
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->rewind(_this);
 
  Returns:
    leResult - the result of the operation
*/
leResult play(leImageSequenceWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leBool isPlaying(const leImageSequenceWidget* _this)
 
  Summary:
     Indicates of the sequence is automatically cycling
 
  Description:
     Indicates of the sequence is automatically cycling
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->isPlaying(_this);
 
  Returns:
    leBool - the setting value
*/
virtual leBool isPlaying(const leImageSequenceWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leBool getRepeat(const leImageSequenceWidget* _this)
 
  Summary:
     Indicates if the sequence will repeat the cycle
 
  Description:
     Indicates if the sequence will repeat the cycle
 
  Parameters:
    const leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->getRepeat(_this);
 
  Returns:
    leBool - the setting value
*/
virtual leBool getRepeat(const leImageSequenceWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setRepeat(leImageSequenceWidget* _this,
                       leBool rpt)
 
  Summary:
     Sets the repeat flag
 
  Description:
     Sets the repeat flag
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    leBool rpt - the setting value
 
  Remarks:
    Usage - _this->fn->setRepeat(_this, rpt);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setRepeat(leImageSequenceWidget* _this,
                           leBool rpt);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult showImage(leImageSequenceWidget* _this,
                       uint32_t idx)
 
  Summary:
     Sets the current visible image index
 
  Description:
     Sets the current visible image index
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
    uint32_t idx - the index
 
  Remarks:
    Usage - _this->fn->showImage(_this, idx);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult showImage(leImageSequenceWidget* _this,
                           uint32_t idx);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult showNextImage(leImageSequenceWidget* _this)
 
  Summary:
     Advance to the next image
 
  Description:
     Advance to the next image
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->showNextImage(_this);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult showNextImage(leImageSequenceWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult showPreviousImage(leImageSequenceWidget* _this)
 
  Summary:
     Return to the previous image
 
  Description:
     Return to the previous image
 
  Parameters:
    leImageSequenceWidget* _this - The image sequence widget to operate on
 
  Remarks:
    Usage - _this->fn->showPreviousImage(_this);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult showPreviousImage(leImageSequenceWidget* _this);
 
virtual leImageSequenceImageChangedEvent_FnPtr getImageChangedEventCallback(const leImageSequenceWidget* _this);
 
virtual leResult setImageChangedEventCallback(leImageSequenceWidget* _this,
                                              leImageSequenceImageChangedEvent_FnPtr cb);
 
#undef THIS_TYPE
#endif
 
#endif // LE_IMAGESEQUENCE_WIDGET_ENABLED
#endif /* LEGATO_IMAGESEQUENCE_H */