153 lines
3.3 KiB
C++
Executable File
153 lines
3.3 KiB
C++
Executable File
/*
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IGUIScrollBar
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by Gustav Larsson
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gee@pyro.nu
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*/
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#include "precompiled.h"
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#include "GUI.h"
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using namespace std;
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//-------------------------------------------------------------------
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// IGUIScrollBar
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//-------------------------------------------------------------------
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IGUIScrollBar::IGUIScrollBar() : m_pStyle(NULL), m_pGUI(NULL),
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m_X(300), m_Y(300),
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m_ScrollRange(1), m_ScrollSpace(0), // MaxPos: not 0, due to division.
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m_Length(200), m_Width(20),
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m_BarSize(0.5), m_Pos(0),
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m_UseEdgeButtons(true),
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m_ButtonPlusPressed(false),
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m_ButtonMinusPressed(false),
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m_ButtonPlusHovered(false),
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m_ButtonMinusHovered(false),
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m_BarHovered(false),
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m_BarPressed(false)
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{
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}
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IGUIScrollBar::~IGUIScrollBar()
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{
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}
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void IGUIScrollBar::SetupBarSize()
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{
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m_BarSize = min((float)m_ScrollSpace/(float)m_ScrollRange, 1.f);
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}
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const SGUIScrollBarStyle *IGUIScrollBar::GetStyle() const
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{
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if (!m_pHostObject)
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return NULL;
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return m_pHostObject->GetScrollBarStyle(m_ScrollBarStyle);
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}
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CGUI *IGUIScrollBar::GetGUI() const
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{
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if (!m_pHostObject)
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return NULL;
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return m_pHostObject->GetGUI();
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}
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void IGUIScrollBar::UpdatePosBoundaries()
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{
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if (m_Pos < 0 ||
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m_ScrollRange < m_ScrollSpace) // <= scrolling not applicable
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m_Pos = 0;
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else
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if (m_Pos > m_ScrollRange - m_ScrollSpace)
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m_Pos = m_ScrollRange - m_ScrollSpace;
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}
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void IGUIScrollBar::HandleMessage(const SGUIMessage &Message)
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{
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switch (Message.type)
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{
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case GUIM_MOUSE_MOTION:
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{
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// TODO Gee: Optimizations needed!
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CPos mouse = m_pHostObject->GetMousePos();
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// If bar is being dragged
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if (m_BarPressed)
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{
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SetPosFromMousePos(mouse);
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UpdatePosBoundaries();
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}
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CRect bar_rect = GetBarRect();
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// check if components are being hovered
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m_BarHovered = bar_rect.PointInside(mouse);
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m_ButtonMinusHovered = HoveringButtonMinus(m_pHostObject->GetMousePos());
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m_ButtonPlusHovered = HoveringButtonPlus(m_pHostObject->GetMousePos());
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if (!m_ButtonMinusHovered)
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m_ButtonMinusPressed = false;
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if (!m_ButtonPlusHovered)
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m_ButtonPlusPressed = false;
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} break;
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case GUIM_MOUSE_PRESS_LEFT:
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{
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if (!m_pHostObject)
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break;
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CPos mouse = m_pHostObject->GetMousePos();
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// if bar is pressed
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if (GetBarRect().PointInside(mouse))
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{
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m_BarPressed = true;
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m_BarPressedAtPos = mouse;
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m_PosWhenPressed = (float)m_Pos;
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}
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else
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// if button-minus is pressed
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if (m_ButtonMinusHovered)
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{
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m_ButtonMinusPressed = true;
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ScrollMinus();
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}
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else
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// if button-plus is pressed
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if (m_ButtonPlusHovered)
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{
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m_ButtonPlusPressed = true;
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ScrollPlus();
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}
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else
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// Pressing the background of the bar, to scroll
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// notice the if-sentence alone does not admit that,
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// it must be after the above if/elses
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{
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if (GetOuterRect().PointInside(mouse))
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{
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// Scroll plus or minus a lot, this might change, it doesn't
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// have to be fancy though.
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if (mouse.y < GetBarRect().top)
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ScrollMinusPlenty();
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else
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ScrollPlusPlenty();
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// Simulate mouse movement to see if bar now is hovered
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HandleMessage(SGUIMessage(GUIM_MOUSE_MOTION));
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}
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}
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} break;
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case GUIM_MOUSE_RELEASE_LEFT:
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m_ButtonMinusPressed = false;
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m_ButtonPlusPressed = false;
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break;
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default:
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break;
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}
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}
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