mirror of https://github.com/FWGS/hlsdk-xash3d
208 lines
3.9 KiB
C++
208 lines
3.9 KiB
C++
//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================
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#include "vgui_listbox.h"
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using namespace vgui;
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CListBox::CListBox() : Panel(0, 0, 0, 0),
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m_ItemsPanel(0,0,0,0),
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m_ScrollBar(0, 0, 0, 0, true),
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m_Slider(0, 0, 10, 40, true)
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{
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m_Signal.m_pListBox = this;
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m_ItemsPanel.setParent(this);
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m_ItemsPanel.setBgColor(0,0,0,255);
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m_Slider.setRangeWindow(50);
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m_Slider.setRangeWindowEnabled(true);
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m_ScrollBar.setParent(this);
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m_ScrollBar.addIntChangeSignal(&m_Signal);
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m_ScrollBar.setSlider(&m_Slider);
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m_ScrollBar.setButtonPressedScrollValue(1);
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m_Items.m_pNext = m_Items.m_pPrev = &m_Items;
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m_ItemOffset = 0;
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m_iScrollMax = -1;
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}
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CListBox::~CListBox()
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{
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Term();
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}
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void CListBox::Init()
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{
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Term();
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}
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void CListBox::Term()
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{
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m_ItemOffset = 0;
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// Free the LBItems.
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LBItem *pNext;
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for(LBItem *pItem=m_Items.m_pNext; pItem != &m_Items; pItem=pNext)
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{
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pItem->m_pPanel->setParent(NULL); // detach the panel from us
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pNext = pItem->m_pNext;
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delete pItem;
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}
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m_Items.m_pPrev = m_Items.m_pNext = &m_Items;
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}
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void CListBox::AddItem(Panel* panel)
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{
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// Add the item.
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LBItem *pItem = new LBItem;
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if(!pItem)
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return;
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pItem->m_pPanel = panel;
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pItem->m_pPanel->setParent(&m_ItemsPanel);
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pItem->m_pPrev = m_Items.m_pPrev;
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pItem->m_pNext = &m_Items;
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pItem->m_pNext->m_pPrev = pItem->m_pPrev->m_pNext = pItem;
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m_ScrollBar.setRange(0, GetScrollMax());
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m_Slider.setRangeWindow(50);
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m_Slider.setRangeWindowEnabled(true);
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InternalLayout();
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}
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int CListBox::GetNumItems()
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{
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int count=0;
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for(LBItem *pItem=m_Items.m_pNext; pItem != &m_Items; pItem=pItem->m_pNext)
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++count;
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return count;
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}
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int CListBox::GetItemWidth()
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{
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int wide, tall;
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m_ItemsPanel.getSize(wide, tall);
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return wide;
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}
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int CListBox::GetScrollPos()
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{
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return m_ItemOffset;
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}
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void CListBox::SetScrollPos(int pos)
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{
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int maxItems = GetScrollMax();
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if(maxItems < 0)
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return;
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m_ItemOffset = (pos < 0) ? 0 : ((pos > maxItems) ? maxItems : pos);
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InternalLayout();
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}
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void CListBox::setPos(int x, int y)
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{
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Panel::setPos(x, y);
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InternalLayout();
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}
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void CListBox::setSize(int wide,int tall)
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{
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Panel::setSize(wide,tall);
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InternalLayout();
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}
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void CListBox::setPixelScroll(int value)
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{
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m_ItemOffset = m_ScrollBar.getValue();
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InternalLayout();
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}
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void CListBox::InternalLayout()
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{
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int x, y, wide, tall;
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getBounds(x, y, wide, tall);
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// Reposition the main panel and the scrollbar.
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m_ItemsPanel.setBounds(0, 0, wide-15, tall);
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m_ScrollBar.setBounds(wide-15, 0, 15, tall);
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bool bNeedScrollbar = false;
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// Reposition the items.
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int curItem = 0;
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int curY = 0;
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int maxItem = GetScrollMax();
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for(LBItem *pItem=m_Items.m_pNext; pItem != &m_Items; pItem=pItem->m_pNext)
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{
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if(curItem < m_ItemOffset)
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{
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pItem->m_pPanel->setVisible(false);
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bNeedScrollbar = true;
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}
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else if (curItem >= maxItem)
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{
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// item is past the end of the items we care about
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pItem->m_pPanel->setVisible(false);
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}
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else
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{
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pItem->m_pPanel->setVisible(true);
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int itemWidth, itemHeight;
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pItem->m_pPanel->getSize(itemWidth, itemHeight);
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// Don't change the item's height but change its width to fit the listbox.
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pItem->m_pPanel->setBounds(0, curY, wide, itemHeight);
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curY += itemHeight;
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if (curY > tall)
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{
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bNeedScrollbar = true;
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}
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}
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++curItem;
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}
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m_ScrollBar.setVisible(bNeedScrollbar);
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repaint();
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}
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void CListBox::paintBackground()
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{
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}
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void CListBox::SetScrollRange(int maxScroll)
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{
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m_iScrollMax = maxScroll;
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m_ScrollBar.setRange(0, maxScroll);
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InternalLayout();
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}
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int CListBox::GetScrollMax()
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{
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if (m_iScrollMax < 0)
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{
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return GetNumItems() - 1;
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}
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return m_iScrollMax;
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}
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