ShowPreviousPage()

void Init::ShowPreviousPage ( )

protected

См. определение в файле UiHintPanel.c строка 497

{   
    #ifdef DIAG_DEVELOPER
    static int              m_ForcedIndex = -1;//only for debug purposes
    #endif
    
    // Const
    protected int           m_SlideShowDelay            = 25000;                                            // The speed of the slideshow 
    protected string                m_RootPath            = "Gui/layouts/new_ui/hints/in_game_hints.layout";  // Layout path 
    protected const string          m_DataPath            = "scripts/data/hints.json";                        // Json path
    // Widgets
    protected Widget              m_RootFrame;
    protected Widget              m_SpacerFrame;
    protected ButtonWidget          m_UiLeftButton;
    protected ButtonWidget          m_UiRightButton;
    protected RichTextWidget      m_UiDescLabel;
    protected TextWidget          m_UiHeadlineLabel;
    protected ImageWidget           m_UiHintImage;
    protected TextWidget          m_UiPageingLabel;
    // Data     
    protected ref array<ref HintPage>    m_ContentList;
    protected int                   m_PageIndex = int.MIN;
    protected DayZGame              m_Game;
    protected bool                  m_Initialized;
    protected Widget              m_ParentWidget;
    protected int                   m_PreviousRandomIndex = int.MIN;
    
    // ---------------------------------------------------------
    
    // Constructor
    void UiHintPanel(Widget parent_widget)
    {       
        DayZGame game = DayZGame.Cast(GetGame());
        m_ParentWidget = parent_widget;
        Init(game);
    }
    // Destructor
    void ~UiHintPanel()
    {
        StopSlideShow();
    
        if(m_RootFrame)
            m_RootFrame.Unlink();
    }
 
    
    void Init(DayZGame game)
    {
        //as this class is now also being instantiated from within the DayZGame CTOR, where GetGame() does not work yet, we need a way to pass the game instance from DayZGame CTOR
        //however for modding legacy support purposes, this was done without modifying the CTOR signature with the addition of the Init method, 
        //in order to keep compatibility with existing MODs, there is still a way to instantiate this class properly even without calling Init from the outside
        
        if (m_Initialized)
            return;
        if (!game)//is null when instantiated from DayZGame during loading before calling Init explicitly
            return;
        m_Initialized = true;
 
        m_Game = game;
        // Load Json File 
        LoadContentList();
        // If load successful 
        if (m_ContentList) 
        {
            // Build the layout
            BuildLayout(m_ParentWidget);
            // Get random page index 
            RandomizePageIndex();
            // Populate the layout with data
            PopulateLayout();
            // Start the slideshow
            StartSlideshow();         
        }
        else 
            ErrorEx("Could not create the hint panel. The data are missing!");
    }
    
    // ------------------------------------------------------
    
    // Load content data from json file 
    protected void LoadContentList()
    {
        string errorMessage;
        if (!JsonFileLoader<array<ref HintPage>>.LoadFile(m_DataPath, m_ContentList, errorMessage))
            ErrorEx(errorMessage);
    }   
    
    // Create and Build the layout 
    protected void BuildLayout(Widget parent_widget)
    {
        // Create the layout
        m_RootFrame = m_Game.GetWorkspace().CreateWidgets(m_RootPath, parent_widget);
        
        if (m_RootFrame)
        {
            // Find Widgets
            m_SpacerFrame      = m_RootFrame.FindAnyWidget("GridSpacerWidget1");        
            m_UiLeftButton        = ButtonWidget.Cast(m_RootFrame.FindAnyWidget("LeftButton"));        
            m_UiRightButton      = ButtonWidget.Cast(m_RootFrame.FindAnyWidget("RightButton"));
            m_UiHeadlineLabel  = TextWidget.Cast(m_RootFrame.FindAnyWidget("HeadlineLabel")); 
            m_UiDescLabel      = RichTextWidget.Cast(m_RootFrame.FindAnyWidget("HintDescLabel"));
            m_UiHintImage      = ImageWidget.Cast(m_RootFrame.FindAnyWidget("HintImage"));
            m_UiPageingLabel    = TextWidget.Cast(m_RootFrame.FindAnyWidget("PageInfoLabel"));
            // Set handler
            m_RootFrame.SetHandler(this);
        }
    }
    
    // Populate the hint with content
    protected void PopulateLayout()
    {
        if (m_RootFrame)
        {
            SetHintHeadline();
            SetHintDescription();
            SetHintImage();
            SetHintPaging();
        }
    }   
    
    // -------------------------------------------
    // Setters
    protected void SetHintHeadline()
    {
        m_UiHeadlineLabel.SetText(m_ContentList.Get(m_PageIndex).GetHeadlineText());
    }
    protected void SetHintDescription()
    {
        #ifdef DEVELOPER
        //Print("showing contents for page "+m_PageIndex);
        #endif
        m_UiDescLabel.SetText(m_ContentList.Get(m_PageIndex).GetDescriptionText());
        m_UiDescLabel.Update();
        m_SpacerFrame.Update();
    }
    protected void SetHintImage()
    {
        string image_path = m_ContentList.Get(m_PageIndex).GetImagePath();
        
        // If there is an image 
        if (image_path)
        {   
            // Show the widget
            m_UiHintImage.Show(true);
            // Set the image path
            m_UiHintImage.LoadImageFile(0, image_path);
        }
        else 
        {
            // Hide the widget
            m_UiHintImage.Show(false);
        }
    }
    protected void SetHintPaging()
    {
        if (m_UiPageingLabel)
            m_UiPageingLabel.SetText(string.Format("%1 / %2", m_PageIndex + 1, m_ContentList.Count())); 
    }
    
    void ShowRandomPage()
    {
        RandomizePageIndex();
        PopulateLayout();
    }
    
    // Set a random page index 
    protected void RandomizePageIndex()
    {
        #ifdef DIAG_DEVELOPER
        if (DiagMenu.IsInitialized())
        {
            if (m_ForcedIndex != -1)
            {
                m_PageIndex = Math.Clamp(m_ForcedIndex,0,m_ContentList.Count() - 1);
                return; 
            }
        }   
        #endif
        
        Math.Randomize(m_Game.GetTime());
        Math.RandomFloat01();//throw-away value, without calling this, the next random number is always the same, calling Math.Randomize(-1) makes no difference
        while (m_PageIndex == m_PreviousRandomIndex)
            m_PageIndex = Math.RandomIntInclusive(0, m_ContentList.Count() - 1);
        m_PreviousRandomIndex = m_PageIndex;
        
    }
    // Show next hint page by incrementing the page index. 
    protected void ShowNextPage()
    {
        // Update the page index
        if ( m_PageIndex < m_ContentList.Count() - 1 )
        {
            m_PageIndex++;
        }
        else                                            
        {
            m_PageIndex = 0;
        }
        
        //Update the hint page
        PopulateLayout();
    }   
    // Show previous hint page by decreasing the page index. 
    protected void ShowPreviousPage()
    {
        // Update the page index
        if ( m_PageIndex == 0 )
        {
            m_PageIndex = m_ContentList.Count() - 1;
        }
        else 
        {
            m_PageIndex--;
        
        }
        //Update the hint page
        PopulateLayout();
    }
 
    // -------------------------------------------
    // Slideshow
    
    // Creates new slidshow thread
    protected void StartSlideshow()
    {
        m_Game.GetCallQueue(CALL_CATEGORY_GUI).CallLater(SlideshowThread, m_SlideShowDelay);
    }
    // Slidshow thread - run code
    protected void SlideshowThread()
    {
        ShowNextPage();
    }
    // Stop the slide show
    protected void StopSlideShow()
    {
        m_Game.GetCallQueue(CALL_CATEGORY_GUI).Remove(SlideshowThread);
    }
    // Restart the slide show 
    protected void RestartSlideShow()
    {
        StopSlideShow();
        StartSlideshow();
    }
    
    // ----------------------------------------
    // Layout manipulation
    
    override bool OnClick(Widget w, int x, int y, int button)
    {
        if (button == MouseState.LEFT)
        {
            switch (w)
            {
                case m_UiLeftButton:
                {
                    ShowPreviousPage();
                    return true;
                }
                case m_UiRightButton:
                {   
                    ShowNextPage();
                    return true;
                }   
            }
        }
        return false;
    }
    override bool OnMouseEnter(Widget w, int x, int y)
    {
        if (w == m_RootPath || w == m_UiLeftButton || w == m_UiRightButton)
        {
            StopSlideShow();
            return true;
        }
        return false;
    }
    override bool OnMouseLeave(Widget w, Widget enterW, int x, int y)
    {
        if (w == m_RootPath || w == m_UiLeftButton || w == m_UiRightButton)
        {
            RestartSlideShow();
            return true;
        }
        return false;
    }
}
 
// ---------------------------------------------------------------------------------------------------------
class UiHintPanelLoading extends UiHintPanel
{
    override void Init(DayZGame game)
    {
        m_RootPath = "Gui/layouts/new_ui/hints/in_game_hints_load.layout";
        super.Init(game);
    }
}