Gered
c5cdddbeaa
current versions of all of my basic framework sources, build configurations/scripts, and supporting assets
136 lines
3.2 KiB
C++
136 lines
3.2 KiB
C++
/*
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GWEN
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Copyright (c) 2010 Facepunch Studios
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See license in Gwen.h
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*/
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#include "gwen_scrollbar.h"
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#include "gwen_horizontalscrollbar.h"
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using namespace Gwen;
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using namespace Gwen::Controls;
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GWEN_CONTROL_CONSTRUCTOR( HorizontalScrollBar )
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{
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m_Bar->SetHorizontal();
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m_ScrollButton[SCROLL_BUTTON_LEFT]->SetDirectionLeft();
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m_ScrollButton[SCROLL_BUTTON_LEFT]->onPress.Add( this, &HorizontalScrollBar::NudgeLeft );
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m_ScrollButton[SCROLL_BUTTON_RIGHT]->SetDirectionRight();
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m_ScrollButton[SCROLL_BUTTON_RIGHT]->onPress.Add( this, &HorizontalScrollBar::NudgeRight );
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m_Bar->onDragged.Add( this, &HorizontalScrollBar::OnBarMoved );
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}
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void HorizontalScrollBar::Layout( Skin::Base* skin )
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{
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BaseClass::Layout( skin );
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m_ScrollButton[SCROLL_BUTTON_LEFT]->SetWidth( Height() );
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m_ScrollButton[SCROLL_BUTTON_LEFT]->Dock(Pos::Left);
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m_ScrollButton[SCROLL_BUTTON_RIGHT]->SetWidth( Height() );
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m_ScrollButton[SCROLL_BUTTON_RIGHT]->Dock(Pos::Right);
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m_Bar->SetHeight( GetButtonSize() );
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m_Bar->SetPadding( Padding( GetButtonSize(), 0, GetButtonSize(), 0 ) );
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float barWidth = (m_fViewableContentSize / m_fContentSize) * (Width() - GetButtonSize());
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if ( barWidth < GetButtonSize() * 0.5 )
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barWidth = GetButtonSize() * 0.5;
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m_Bar->SetWidth( barWidth );
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m_Bar->SetHidden( Width() - (GetButtonSize() * 2) <= barWidth );
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//Based on our last scroll amount, produce a position for the bar
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if ( !m_Bar->IsDepressed() )
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{
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SetScrolledAmount( GetScrolledAmount(), true );
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}
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}
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void HorizontalScrollBar::NudgeLeft( Base* /*control*/ )
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{
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if ( !IsDisabled() )
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SetScrolledAmount( GetScrolledAmount() - GetNudgeAmount(), true);
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}
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void HorizontalScrollBar::NudgeRight( Base* /*control*/ )
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{
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if ( !IsDisabled() )
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SetScrolledAmount( GetScrolledAmount() + GetNudgeAmount(), true);
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}
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void HorizontalScrollBar::ScrollToLeft()
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{
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SetScrolledAmount( 0, true);
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}
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void HorizontalScrollBar::ScrollToRight()
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{
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SetScrolledAmount( 1, true);
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}
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float HorizontalScrollBar::GetNudgeAmount()
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{
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if ( m_bDepressed )
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return m_fViewableContentSize / m_fContentSize;
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else
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return BaseClass::GetNudgeAmount();
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}
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void HorizontalScrollBar::OnMouseClickLeft( int x, int y, bool bDown )
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{
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if ( bDown )
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{
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m_bDepressed = true;
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Gwen::MouseFocus = this;
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}
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else
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{
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Gwen::Point clickPos = CanvasPosToLocal( Gwen::Point( x, y ) );
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if ( clickPos.x < m_Bar->X() )
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NudgeLeft( this );
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else if ( clickPos.x > m_Bar->X() + m_Bar->Width() )
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NudgeRight( this );
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m_bDepressed = false;
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Gwen::MouseFocus = NULL;
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}
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}
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float HorizontalScrollBar::CalculateScrolledAmount()
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{
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return (float)(m_Bar->X() - GetButtonSize()) / (float)(Width() - m_Bar->Width() - (GetButtonSize() * 2 ));
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}
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bool HorizontalScrollBar::SetScrolledAmount( float amount, bool forceUpdate )
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{
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amount = Gwen::Clamp( amount, 0, 1 );
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if ( !BaseClass::SetScrolledAmount( amount, forceUpdate ) )
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return false;
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if ( forceUpdate )
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{
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int newX = GetButtonSize() + (amount * ((Width() - m_Bar->Width()) - (GetButtonSize()*2)));
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m_Bar->MoveTo( newX, m_Bar->Y() );
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}
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return true;
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}
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void HorizontalScrollBar::OnBarMoved( Controls::Base* control )
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{
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if ( m_Bar->IsDepressed() )
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{
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SetScrolledAmount( CalculateScrolledAmount(), false );
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BaseClass::OnBarMoved(control);
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}
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else
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InvalidateParent();
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} |