DropdownPrefab.c

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class DropdownPrefab extends ScriptedWidgetEventHandler
{
  protected Widget m_Root;
  protected Widget m_Parent;
  protected ScrollWidget m_Scroller;
  protected Widget m_ContentContainer;
  protected ref array<Widget> m_Content = new array<Widget>;
 
  protected Widget m_Button;
  protected Widget m_Holder;
  protected TextWidget m_Text;
  protected ImageWidget m_ImageExpand;
  protected ImageWidget m_ImageCollapse;
 
  protected bool m_IsExpanded;
  ref ScriptInvoker m_OnSelectItem = new ScriptInvoker();
 
  void DropdownPrefab(Widget root, string text = "")
  {
    m_Parent = root;
    m_Root = GetGame().GetWorkspace().CreateWidgets("gui/layouts/new_ui/dropdown_prefab/dropdown_prefab.layout", root);
 
    m_Scroller = ScrollWidget.Cast(m_Root.FindAnyWidget("dropdown_container"));
    m_ContentContainer = m_Root.FindAnyWidget("dropdown_content");
    m_Text = TextWidget.Cast(m_Root.FindAnyWidget("dropdown_text"));
    m_Holder = m_Root.FindAnyWidget("holder");
    SetText(text);
 
    m_Button = m_Root.FindAnyWidget("dropdown_selector_button");
    m_ImageExpand = ImageWidget.Cast(m_Root.FindAnyWidget("expand_image"));
    m_ImageCollapse = ImageWidget.Cast(m_Root.FindAnyWidget("collapse_image"));
 
    m_Root.SetHandler(this);
 
    RefreshContent();
  }
 
  void RefreshContent()
  {
    Widget child = m_ContentContainer.GetChildren();
    while (child)
    {
      if (m_Content.Find(child) > -1)
        m_Content.Insert(child);
    }
 
    m_ContentContainer.Update();
    m_Root.Update();
 
    float x, y;
    m_ContentContainer.GetScreenSize(x, y);
    if (y > m_Scroller.GetContentHeight())
      m_Scroller.SetAlpha(1);
    else
      m_Scroller.SetAlpha(0);
  }
 
  int AddElement(string text, Widget content = null)
  {
    ButtonWidget element = ButtonWidget.Cast(GetGame().GetWorkspace().CreateWidgets("gui/layouts/new_ui/dropdown_prefab/dropdown_element.layout", m_ContentContainer));
    RichTextWidget textWidget = RichTextWidget.Cast(element.FindAnyWidget("dropdown_element_text"));
    textWidget.SetText(text);
 
    if (content)
      element.AddChild(content, false);
    m_ContentContainer.Update();
    textWidget.Update();
    m_Root.Update();
    element.Update();
 
    m_Content.Insert(element);
    return m_Content.Count() - 1;
  }
 
  void RemoveElement(int index)
  {
    if (0 < index && index < m_Content.Count())
    {
      delete m_Content.Get(index);
      m_ContentContainer.Update();
      m_Root.Update();
      m_Parent.Update();
    }
  }
 
  void Close()
  {
    if (m_IsExpanded)
    {
      m_IsExpanded = !m_IsExpanded;
      m_Scroller.Show(m_IsExpanded);
      m_ImageExpand.Show(!m_IsExpanded);
      m_ImageCollapse.Show(m_IsExpanded);
 
      m_Root.Update();
      m_Parent.Update();
    }
  }
 
  void SetText(string text)
  {
    m_Text.SetText(text);
  }
 
  override bool OnClick(Widget w, int x, int y, int button)
  {
    int index = m_Content.Find(w);
    if (index > -1)
    {
      m_OnSelectItem.Invoke(index);
      m_IsExpanded = false;
      m_Scroller.Show(m_IsExpanded);
      m_ImageExpand.Show(!m_IsExpanded);
      m_ImageCollapse.Show(m_IsExpanded);
      return true;
    }
    return false;
  }
 
  override bool OnMouseButtonDown(Widget w, int x, int y, int button)
  {
    if ((w == m_Button || w == m_Text || w == m_Holder) && button == MouseState.LEFT)
    {
      m_IsExpanded = !m_IsExpanded;
      m_Scroller.Show(m_IsExpanded);
      m_ImageExpand.Show(!m_IsExpanded);
      m_ImageCollapse.Show(m_IsExpanded);
 
      m_Root.Update();
      m_Parent.Update();
      m_ContentContainer.Update();
 
      return true;
    }
    return false;
  }
}