bookmenu.c

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class BookMenu extends UIScriptedMenu
{
 protected TextWidget m_author;
 protected TextWidget m_title;
 protected TextWidget m_page;
 protected HtmlWidget m_content;
 protected float m_page_height;
 protected float m_content_total_height;
 protected float m_content_pos;
 
 override Widget Init()
 {
 layoutRoot = GetGame().GetWorkspace().CreateWidgets("gui/layouts/day_z_book.layout");
 Class.CastTo(m_content, layoutRoot.FindAnyWidget("HtmlWidget"));
 Class.CastTo(m_author, layoutRoot.FindAnyWidget("Author")); 
 Class.CastTo(m_title, layoutRoot.FindAnyWidget("Title"));
 Class.CastTo(m_page, layoutRoot.FindAnyWidget("Page"));
 
 float width;
 m_content.GetScreenSize(width, m_page_height);
 return layoutRoot;
 }
 
 void ReadBook(InventoryItem book)
 {
 m_content.LoadFile( book.ConfigGetString("file") );
 m_author.SetText( book.ConfigGetString("author") );
 m_title.SetText( book.ConfigGetString("title") );
 m_content_total_height = m_content.GetContentHeight();
 m_content_pos = 0;
 NextPrevPage(false);
 }
 
 override bool OnClick(Widget w, int x, int y, int button)
 {
 super.OnClick(w, x, y, button);
 
 switch (w.GetUserID())
 {
 case IDC_BOOK_VIEWER_PREV:
 NextPrevPage(false);
 return true;
 case IDC_BOOK_VIEWER_NEXT:
 NextPrevPage(true);
 return true;
 case IDC_CANCEL:
 Close();
 return true;
 }
 
 return false;
 }
 
 void NextPrevPage(bool next)
 {
 if (next)
 {
 m_content_pos = m_content_pos + m_page_height;
 }
 else
 {
 m_content_pos = m_content_pos - m_page_height;
 }
 
 float maxOffset = 0;
 if (m_content_total_height > m_page_height)
 {
 maxOffset = m_content_total_height - m_page_height;
 } 
 
 if (m_content_pos < 0)
 {
 m_content_pos = 0;
 }
 
 if (m_content_pos > maxOffset)
 {
 m_content_pos = maxOffset;
 }
 
 m_content.SetContentOffset(m_content_pos, true);
 
 float pagesTotal = Math.Ceil(m_content_total_height / m_page_height);
 float currPage = Math.Round(m_content_pos / m_page_height) + 1;
 
 m_page.SetText( currPage.ToString() + " / " + pagesTotal.ToString() );
 }
}