legato_widget_list.h

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/*******************************************************************************
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*
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/*******************************************************************************
 Module for Microchip Graphics Library - Legato User Interface Library
 
  Company:
    Microchip Technology Inc.
 
  File Name:
    legato_widget_list.h
 
  Summary:
 
 
  Description:
    This module implements list box widget functions.
*******************************************************************************/
 
#ifndef LEGATO_LISTWIDGET_H
#define LEGATO_LISTWIDGET_H
 
#include "gfx/legato/common/legato_common.h"
 
#if LE_LIST_WIDGET_ENABLED == 1 && LE_SCROLLBAR_WIDGET_ENABLED == 1
 
#include "gfx/legato/image/legato_image.h"
#include "gfx/legato/string/legato_string.h"
#include "gfx/legato/widget/list/legato_widget_list.h"
#include "gfx/legato/widget/scrollbar/legato_widget_scrollbar.h"
 
 
typedef struct leListWidget leListWidget;
 
// *****************************************************************************
/* Function Pointer:
    leListWidget_SelectedItemChangedEvent
 
  Summary:
    Selected item changed event function callback type
*/
typedef void (*leListWidget_SelectedItemChangedEvent)(leListWidget*,
                                                      uint32_t idx,
                                                      leBool selected);
 
// *****************************************************************************
// *****************************************************************************
// Section: Data Types and Constants
// *****************************************************************************
// *****************************************************************************
 
// *****************************************************************************
/* Enumeration:
    leListWidget_SelectionMode
 
  Summary:
    Defines the list selection modes
 
  Description:
    Single - a single selection from the list is allowed at any one time
    Multiple - any number of selected items is allowed at any one time
    Contiguous - any number of selected items in a contiguous serious is allowed
                 at any one time
 
  Remarks:
    None.
*/
typedef enum leListWidget_SelectionMode
{
    LE_LIST_WIDGET_SELECTION_MODE_SINGLE,
    LE_LIST_WIDGET_SELECTION_MODE_MULTIPLE,
    LE_LIST_WIDGET_SELECTION_MODE_CONTIGUOUS
} leListWidget_SelectionMode;
 
// *****************************************************************************
/* Structure:
    leListItem
 
  Summary:
    Defines a list item struct
 
  Description:
 
 
  Remarks:
    None.
*/
typedef struct leListItem
{
    const leString* string; // list item string
    const leImage* icon; // list item icon
    leBool selected; // list item selected flag
    leRect rowRect; // list item row rectangle
    leBool enabled; //enable or disable the item
} leListItem;
 
/* internal use only */
typedef struct leListWidget leListWidget;
 
#define LE_LISTWIDGET_VTABLE(THIS_TYPE) \
    LE_WIDGET_VTABLE(THIS_TYPE) \
    \
    leListWidget_SelectionMode (*getSelectionMode)(const THIS_TYPE* _this); \
    leResult      (*setSelectionMode)(THIS_TYPE* _this, leListWidget_SelectionMode mode); \
    leBool        (*getAllowEmptySelection)(const THIS_TYPE* _this); \
    leResult      (*setAllowEmptySelection)(THIS_TYPE* _this, leBool allow); \
    leRelativePosition  (*getIconPosition)(const THIS_TYPE* _this); \
    leResult      (*setIconPosition)(THIS_TYPE* _this, leRelativePosition pos); \
    uint32_t      (*getIconMargin)(const THIS_TYPE* _this); \
    leResult      (*setIconMargin)(THIS_TYPE* _this, uint32_t mg); \
    uint32_t      (*getItemCount)(const THIS_TYPE* _this); \
    int32_t       (*appendItem)(THIS_TYPE* _this); \
    int32_t       (*insertItem)(THIS_TYPE* _this, int32_t idx); \
    leResult      (*removeItem)(THIS_TYPE* _this, int32_t idx); \
    leResult      (*removeAllItems)(THIS_TYPE* _this); \
    leBool        (*getItemSelected)(const THIS_TYPE* _this, int32_t idx); \
    leResult      (*setItemSelected)(THIS_TYPE* _this, int32_t idx, leBool selected); \
    leResult      (*toggleItemSelected)(THIS_TYPE* _this, int32_t idx); \
    leResult      (*selectAll)(THIS_TYPE* _this); \
    leResult      (*deselectAll)(THIS_TYPE* _this); \
    int32_t       (*getFirstSelectedItem)(const THIS_TYPE* _this); \
    int32_t       (*getLastSelectedItem)(const THIS_TYPE* _this); \
    uint32_t      (*getSelectionCount)(const THIS_TYPE* _this); \
    leString*     (*getItemString)(const THIS_TYPE* _this, int32_t idx); \
    leResult      (*setItemString)(THIS_TYPE* _this, int32_t idx, const leString* str); \
    leImage*      (*getItemIcon)(const THIS_TYPE* _this, int32_t idx); \
    leResult      (*setItemIcon)(THIS_TYPE* _this, int32_t idx, const leImage* img); \
    leBool        (*getItemEnable)(const THIS_TYPE* _this, int32_t idx); \
    leResult      (*setItemEnable)(THIS_TYPE* _this, int32_t idx, leBool b); \
    leResult      (*setItemVisible)(THIS_TYPE* _this, int32_t idx); \
    leListWidget_SelectedItemChangedEvent (*getSelectedItemChangedEventCallback)(const THIS_TYPE* _this); \
    leResult      (*setSelectedItemChangedEventCallback)(THIS_TYPE* _this, leListWidget_SelectedItemChangedEvent cb); \
    
typedef struct leListWidgetVTable
{
    LE_LISTWIDGET_VTABLE(leListWidget)
} leListWidgetVTable; 
 
// *****************************************************************************
typedef struct leListWidget
{
    leWidget widget; // list base class
 
    const leListWidgetVTable* fn;
 
    leListWidget_SelectionMode mode; // list selection mode
    leBool allowEmpty; // indicates if the list must always have at least one
                       // selected item
 
    leArray items; // list containing the list items
 
    leRelativePosition iconPos; // icon position for the list icons
    uint32_t iconMargin; // margin for the list icons
 
    int32_t itemDown; // tracks whether an input event is in process
 
    leScrollBarWidget* scrollbar; // internal scrollbar for this widget
 
    leListWidget_SelectedItemChangedEvent cb; // item selected changed event
} leListWidget;
 
// *****************************************************************************
// *****************************************************************************
// Section: Routines
// *****************************************************************************
// *****************************************************************************
 
LIB_EXPORT leListWidget* leListWidget_New();
 
LIB_EXPORT void leListWidget_Constructor(leListWidget* wgt);
 
#ifdef _DOXYGEN_
#define THIS_TYPE struct leWidget
 
 
// *****************************************************************************
/* Virtual Member Function:
    leListWidget_SelectionMode getSelectionMode(const leListWidget* _this)
 
  Summary:
     Gets the current selection mode
 
  Description:
     Gets the current selection mode
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getSelectionMode(_this);
 
  Returns:
    leListWidget_SelectionMode -
*/
virtual leListWidget_SelectionMode getSelectionMode(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setSelectionMode(leListWidget* _this,
                              leListWidget_SelectionMode mode)
 
  Summary:
     Sets the current selection mode
 
  Description:
     Sets the current selection mode
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    leListWidget_SelectionMode mode -
 
  Remarks:
    Usage - _this->fn->setSelectionMode(_this, mode);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setSelectionMode(leListWidget* _this,
                                  leListWidget_SelectionMode mode);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leBool getAllowEmptySelection(const leListWidget* _this)
 
  Summary:
     Gets the allow empty setting value
 
  Description:
     Gets the allow empty setting value
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getAllowEmptySelection(_this);
 
  Returns:
    leBool - the setting value
*/
virtual leBool getAllowEmptySelection(const leListWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setAllowEmptySelection(leListWidget* _this,
                                    leBool allow)
 
  Summary:
     Sets the allow empty setting value
 
  Description:
     Sets the allow empty setting value
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    leBool allow - the setting value
 
  Remarks:
    Usage - _this->fn->setAllowEmptySelection(_this, allow);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setAllowEmptySelection(leListWidget* _this,
                                        leBool allow);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leRelativePosition getIconPosition(const leListWidget* _this)
 
  Summary:
     Gets the image icon position
 
  Description:
     Gets the image icon position
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getIconPosition(_this);
 
  Returns:
    leRelativePosition - the position
*/
virtual leRelativePosition getIconPosition(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setIconPosition(leListWidget* _this,
                             leRelativePosition pos)
 
  Summary:
     Sets the image icon position
 
  Description:
     Sets the image icon position
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    leRelativePosition pos - the position value
 
  Remarks:
    Usage - _this->fn->setIconPosition(_this, pos);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setIconPosition(leListWidget* _this,
                                 leRelativePosition pos);
 
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getIconMargin(const leListWidget* _this)
 
  Summary:
     Gets the icon margin
 
  Description:
     Gets the icon margin
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getIconMargin(_this);
 
  Returns:
    uint32_t - the margin value
*/
virtual uint32_t getIconMargin(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setIconMargin(leListWidget* _this,
                           uint32_t mg)
 
  Summary:
     Sets the icon margin
 
  Description:
     Sets the icon margin
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    uint32_t mg - the margin value
 
  Remarks:
    Usage - _this->fn->setIconMargin(_this, mg);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setIconMargin(leListWidget* _this,
                               uint32_t mg);
 
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getItemCount(const leListWidget* _this)
 
  Summary:
     Gets the item count
 
  Description:
     Gets the item count
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getItemCount(_this);
 
  Returns:
    uint32_t - the item count
*/
virtual uint32_t getItemCount(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    int32_t appendItem(leListWidget* _this)
 
  Summary:
     Appends an item to the list
 
  Description:
     Appends an item to the list
 
  Parameters:
    leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->appendItem(_this);
 
  Returns:
    int32_t - the index of the new item
*/
virtual int32_t appendItem(leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    int32_t insertItem(leListWidget* _this,
                       int32_t idx)
 
  Summary:
     Inserts an item into the list
 
  Description:
     Inserts an item into the list
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->insertItem(_this, idx);
 
  Returns:
    int32_t - the index of the new item
*/
virtual int32_t insertItem(leListWidget* _this,
                           int32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult removeItem(leListWidget* _this,
                        int32_t idx)
 
  Summary:
     Removes an item from the list
 
  Description:
     Removes an item from the list
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->removeItem(_this, idx);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult removeItem(leListWidget* _this,
                            int32_t idx);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult removeAllItems(leListWidget* _this)
 
  Summary:
     Removes all items from the list
 
  Description:
     Removes all items from the list
 
  Parameters:
    leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->removeAllItems(_this);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult removeAllItems(leListWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leBool getItemSelected(const leListWidget* _this,
                           int32_t idx)
 
  Summary:
     Gets the currently selected item
 
  Description:
     Gets the currently selected item
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getItemSelected(_this, idx);
 
  Returns:
    leBool - the selected state
*/
virtual leBool getItemSelected(const leListWidget* _this,
                               int32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setItemSelected(leListWidget* _this,
                             int32_t idx,
                             leBool selected)
 
  Summary:
     Sets the currently selected item
 
  Description:
     Sets the currently selected item
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
    leBool selected - the selected state
 
  Remarks:
    Usage - _this->fn->setItemSelected(_this, idx, selected);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setItemSelected(leListWidget* _this,
                                 int32_t idx,
                                 leBool selected);
 
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult toggleItemSelected(leListWidget* _this,
                                int32_t idx)
 
  Summary:
     Toggles an item selection
 
  Description:
     Toggles an item selection
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->toggleItemSelected(_this, idx);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult toggleItemSelected(leListWidget* _this,
                                    int32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult selectAll(leListWidget* _this)
 
  Summary:
     Selects all items
 
  Description:
     Selects all items
 
  Parameters:
    leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->selectAll(_this);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult selectAll(leListWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    leResult deselectAll(leListWidget* _this)
 
  Summary:
     Deselects all items
 
  Description:
     Deselects all items
 
  Parameters:
    leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->deselectAll(_this);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult deselectAll(leListWidget* _this);
 
 
// *****************************************************************************
/* Virtual Member Function:
    int32_t getFirstSelectedItem(const leListWidget* _this)
 
  Summary:
     Gets the first selected item
 
  Description:
     Gets the first selected item
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getFirstSelectedItem(_this);
 
  Returns:
    int32_t - the selected item index
*/
virtual int32_t getFirstSelectedItem(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    int32_t getLastSelectedItem(const leListWidget* _this)
 
  Summary:
     Gets the last selected item
 
  Description:
     Gets the last selected item
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getLastSelectedItem(_this);
 
  Returns:
    int32_t - the selected item index
*/
virtual int32_t getLastSelectedItem(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    uint32_t getSelectionCount(const leListWidget* _this)
 
  Summary:
     Gets the number of selected items
 
  Description:
     Gets the number of selected items
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
 
  Remarks:
    Usage - _this->fn->getSelectionCount(_this);
 
  Returns:
    uint32_t - the number of selected items
*/
virtual uint32_t getSelectionCount(const leListWidget* _this);
 
// *****************************************************************************
/* Virtual Member Function:
    leString* getItemString(const leListWidget* _this,
                            int32_t idx)
 
  Summary:
     Gets the string pointer for an item
 
  Description:
     Gets the string pointer for an item
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getItemString(_this, idx);
 
  Returns:
    leString* - the string pointer
*/
virtual leString* getItemString(const leListWidget* _this,
                                int32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setItemString(leListWidget* _this,
                           int32_t idx,
                           const leString* str)
 
  Summary:
     Sets the string pointer for an item
 
  Description:
     Sets the string pointer for an item
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
    const leString* str - the string pointer
 
  Remarks:
    Usage - _this->fn->setItemString(_this, idx, str);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setItemString(leListWidget* _this,
                               int32_t idx,
                               const leString* str);
 
// *****************************************************************************
/* Virtual Member Function:
    leImage* getItemIcon(const leListWidget* _this,
                         int32_t idx)
 
  Summary:
     Gets the image pointer for an item
 
  Description:
     Gets the image pointer for an item
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getItemIcon(_this, idx);
 
  Returns:
    leImage* - the image pointer
*/
virtual leImage* getItemIcon(const leListWidget* _this,
                             int32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setItemIcon(leListWidget* _this,
                         int32_t idx,
                         const leImage* img)
 
  Summary:
     Sets the image pointer for an item
 
  Description:
     Sets the image pointer for an item
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
    const leImage* img - the image pointer
 
  Remarks:
    Usage - _this->fn->setItemIcon(_this, idx, img);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setItemIcon(leListWidget* _this,
                             int32_t idx,
                             const leImage* img);
 
// *****************************************************************************
/* Virtual Member Function:
    leBool getItemEnable(const leListWidget* _this,
                         int32_t idx)
 
  Summary:
     Gets an item enable state
 
  Description:
     Gets an item enable state
 
  Parameters:
    const leListWidget* _this - The list widget to operate on
    int32_t idx - the index
 
  Remarks:
    Usage - _this->fn->getItemEnable(_this, idx);
 
  Returns:
    leBool - the enable state
*/
virtual leBool getItemEnable(const leListWidget* _this,
                            int32_t idx);
 
// *****************************************************************************
/* Virtual Member Function:
    leResult setItemEnable(leListWidget* _this,
                           int32_t idx,
                           leBool b)
 
  Summary:
     Sets an item enable state
 
  Description:
     Sets an item enable state
 
  Parameters:
    leListWidget* _this - The list widget to operate on
    int32_t idx - the index
    leBool b - the enable state
 
  Remarks:
    Usage - _this->fn->setItemEnable(_this, idx, b);
 
  Returns:
    leResult - the result of the operation
*/
virtual leResult setItemEnable(leListWidget* _this,
                               int32_t idx,
                               leBool b);
 
 
 
virtual leListWidget_SelectedItemChangedEvent getSelectedItemChangedEventCallback
                                                    (const leListWidget* _this);
 
virtual leResult setSelectedItemChangedEventCallback(leListWidget* _this,
                                                     leListWidget_SelectedItemChangedEvent cb);
 
#undef THIS_TYPE
#endif
 
 
#endif // LE_LIST_WIDGET_ENABLED && LE_SCROLLBAR_WIDGET_ENABLED
#endif /* LEGATO_LISTWIDGET_H */