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// -----------------------------------------------------------
class ScrollBarContainer : ScriptedWidgetEventHandler
{
reference bool Invert;
protected Widget Content;
protected Widget ScrollBar;
protected Widget Scroller;
protected Widget m_root;
const int WHEEL_STEP = 20;
protected float m_root_height;
protected float m_content_height;
protected float m_position;
protected bool m_scrolling;
protected float m_scrolling_start_pos;
protected int m_scrolling_mouse_pos;
void ~ScrollBarContainer()
{
//if(GetGame() != NULL)
//GetGame().GetDragQueue().RemoveCalls(this);
}
void ScrollFixedAmount( bool down, float amount )
{
m_root.Update();
Content.Update();
float width;
m_root.GetScreenSize(width, m_root_height);
Content.GetScreenSize(width, m_content_height);
float diff = m_root_height / m_content_height;
float one_percent = diff / 100;
float percents = amount / m_content_height;
//float step = (1.0 / (m_content_height - m_root_height)) * WHEEL_STEP;
float step = (percents/100);
if(down)
m_position += 1 * ( percents + 0.05 );
else
m_position -= 1 * ( percents + 0.05 );
if (m_position < 0) m_position = 0;
if (m_position > 1 - diff) m_position = 1 - diff;
UpdateScroller();
}
void ScrollToPos( float pos )
{
m_root.Update();
Content.Update();
float width;
m_root.GetScreenSize(width, m_root_height);
Content.GetScreenSize(width, m_content_height);
float diff = m_root_height / m_content_height;
float percents = pos / m_content_height;
m_position = percents;
if (m_position < 0)
m_position = 0;
if (m_position > 1 - diff)
m_position = 1 - diff;
UpdateScroller();
}
void ScrollToBottom()
{
m_root.Update();
Content.Update();
float width;
m_root.GetScreenSize(width, m_root_height);
Content.GetScreenSize(width, m_content_height);
float diff = m_root_height / m_content_height;
m_position = 1 - diff;
UpdateScroller();
}
void ScrollToTop()
{
if( m_position != 0 )
{
m_position = 0;
UpdateScroller();
}
}
float GetContentYPos()
{
float x, y;
Content.GetPos(x, y);
return y;
}
float GetRootHeight()
{
return m_root_height;
}
void UpdateScroller()
{
m_root.Update();
Content.Update();
float width;
float height;
float diff;
float scroller_height;
m_root.GetScreenSize(width, m_root_height);
Content.GetScreenSize(width, m_content_height);
diff = m_content_height - m_root_height;
if (diff <= 0)
{
Content.SetPos(0,0);
Scroller.Show(false);
ScrollBar.Show(false);
m_position = 0;
return;
}
scroller_height = (m_root_height / m_content_height) * m_root_height;
ScrollBar.Show(true);
Scroller.Show(true);
Scroller.GetSize(width, height);
Scroller.SetSize(width, scroller_height);
float pos = ( -m_content_height * m_position );
if( pos <= -diff )
pos = -diff;
Scroller.SetPos(0, -pos);
if(Invert)
Content.SetPos(0, -(diff + (-diff * m_position)));
else
Content.SetPos(0, pos);
}
void OnWidgetScriptInit(Widget w)
{
m_root = w;
m_root.SetHandler(this);
m_root.SetFlags(WidgetFlags.VEXACTPOS);
m_scrolling = false;
UpdateScroller();
}
protected void StopScrolling()
{
if (m_scrolling)
{
GetGame().GetDragQueue().RemoveCalls(this);
m_scrolling = false;
}
}
protected void UpdateScroll(int mouse_x, int mouse_y, bool is_dragging)
{
m_root.Update();
Content.Update();
float width;
m_root.GetScreenSize(width, m_root_height);
Content.GetScreenSize(width, m_content_height);
if (m_scrolling)
{
if (is_dragging)
{
float diff = (mouse_y - m_scrolling_mouse_pos);
float scroller_height = (m_root_height / m_content_height) * m_root_height;
m_position = m_scrolling_start_pos + (diff / (m_root_height - scroller_height));
if (m_position < 0) m_position = 0;
if (m_position > 1) m_position = 1;
}
else
{
m_scrolling = false;
StopScrolling();
}
}
UpdateScroller();
}
// ScriptedWidgetEventHandler override
//--------------------------------------------------------------------------
override bool OnMouseButtonDown(Widget w, int x, int y, int button)
{
if (button == MouseState.LEFT && w == Scroller && !m_scrolling)
{
m_scrolling = true;
m_scrolling_start_pos = m_position;
int mouse_x;
GetMousePos(mouse_x, m_scrolling_mouse_pos);
GetGame().GetDragQueue().Call(this, "UpdateScroll");
return true;
}
return false;
}
//--------------------------------------------------------------------------
override bool OnMouseButtonUp(Widget w, int x, int y, int button)
{
StopScrolling();
return false;
}
//--------------------------------------------------------------------------
override bool OnMouseWheel(Widget w, int x, int y, int wheel)
{
if (m_scrolling || m_content_height <= m_root_height) return false;
float step = (1.0 / (m_content_height - m_root_height)) * WHEEL_STEP;
m_position -= wheel * step;
if (m_position < 0) m_position = 0;
if (m_position > 1) m_position = 1;
UpdateScroller();
return true;
}
override bool OnResize( Widget w, int x, int y) {
if (w == m_root || w == Content)
{
UpdateScroller();
}
return false;
}
};
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