mirror of https://github.com/minetest/irrlicht.git
540 lines
13 KiB
C++
540 lines
13 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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#include "CGUIScrollBar.h"
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#ifdef _IRR_COMPILE_WITH_GUI_
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#include "IGUISkin.h"
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#include "IGUIEnvironment.h"
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#include "IVideoDriver.h"
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#include "CGUIButton.h"
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#include "IGUIFont.h"
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#include "IGUIFontBitmap.h"
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#include "os.h"
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namespace irr
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{
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namespace gui
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{
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//! constructor
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CGUIScrollBar::CGUIScrollBar(bool horizontal, IGUIEnvironment* environment,
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IGUIElement* parent, s32 id,
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core::rect<s32> rectangle, bool noclip)
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: IGUIScrollBar(environment, parent, id, rectangle), UpButton(0),
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DownButton(0), Dragging(false), Horizontal(horizontal),
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DraggedBySlider(false), TrayClick(false), Pos(0), DrawPos(0),
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DrawHeight(0), Min(0), Max(100), SmallStep(10), LargeStep(50), DesiredPos(0),
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LastChange(0)
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{
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#ifdef _DEBUG
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setDebugName("CGUIScrollBar");
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#endif
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refreshControls();
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setNotClipped(noclip);
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// this element can be tabbed to
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setTabStop(true);
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setTabOrder(-1);
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setPos(0);
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}
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//! destructor
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CGUIScrollBar::~CGUIScrollBar()
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{
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if (UpButton)
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UpButton->drop();
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if (DownButton)
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DownButton->drop();
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}
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//! called if an event happened.
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bool CGUIScrollBar::OnEvent(const SEvent& event)
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{
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if (isEnabled())
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{
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switch(event.EventType)
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{
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case EET_KEY_INPUT_EVENT:
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if (event.KeyInput.PressedDown)
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{
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const s32 oldPos = Pos;
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bool absorb = true;
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switch (event.KeyInput.Key)
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{
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case KEY_LEFT:
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case KEY_UP:
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setPos(Pos-SmallStep);
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break;
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case KEY_RIGHT:
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case KEY_DOWN:
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setPos(Pos+SmallStep);
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break;
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case KEY_HOME:
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setPos(Min);
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break;
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case KEY_PRIOR:
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setPos(Pos-LargeStep);
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break;
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case KEY_END:
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setPos(Max);
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break;
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case KEY_NEXT:
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setPos(Pos+LargeStep);
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break;
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default:
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absorb = false;
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}
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if (Pos != oldPos)
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{
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SEvent newEvent;
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newEvent.EventType = EET_GUI_EVENT;
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newEvent.GUIEvent.Caller = this;
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newEvent.GUIEvent.Element = 0;
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newEvent.GUIEvent.EventType = EGET_SCROLL_BAR_CHANGED;
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Parent->OnEvent(newEvent);
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}
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if (absorb)
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return true;
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}
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break;
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case EET_GUI_EVENT:
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if (event.GUIEvent.EventType == EGET_BUTTON_CLICKED)
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{
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if (event.GUIEvent.Caller == UpButton)
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setPos(Pos-SmallStep);
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else
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if (event.GUIEvent.Caller == DownButton)
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setPos(Pos+SmallStep);
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SEvent newEvent;
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newEvent.EventType = EET_GUI_EVENT;
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newEvent.GUIEvent.Caller = this;
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newEvent.GUIEvent.Element = 0;
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newEvent.GUIEvent.EventType = EGET_SCROLL_BAR_CHANGED;
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Parent->OnEvent(newEvent);
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return true;
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}
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else
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if (event.GUIEvent.EventType == EGET_ELEMENT_FOCUS_LOST)
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{
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if (event.GUIEvent.Caller == this)
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Dragging = false;
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}
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break;
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case EET_MOUSE_INPUT_EVENT:
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{
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const core::position2di p(event.MouseInput.X, event.MouseInput.Y);
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bool isInside = isPointInside ( p );
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switch(event.MouseInput.Event)
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{
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case EMIE_MOUSE_WHEEL:
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if (Environment->hasFocus(this))
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{
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// thanks to a bug report by REAPER
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// thanks to tommi by tommi for another bugfix
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// everybody needs a little thanking. hallo niko!;-)
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setPos( getPos() +
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( (event.MouseInput.Wheel < 0 ? -1 : 1) * SmallStep * (Horizontal ? 1 : -1 ) )
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);
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SEvent newEvent;
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newEvent.EventType = EET_GUI_EVENT;
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newEvent.GUIEvent.Caller = this;
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newEvent.GUIEvent.Element = 0;
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newEvent.GUIEvent.EventType = EGET_SCROLL_BAR_CHANGED;
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Parent->OnEvent(newEvent);
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return true;
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}
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break;
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case EMIE_LMOUSE_PRESSED_DOWN:
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{
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if (isInside)
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{
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Dragging = true;
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DraggedBySlider = SliderRect.isPointInside(p);
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TrayClick = !DraggedBySlider;
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DesiredPos = getPosFromMousePos(p);
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return true;
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}
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break;
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}
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case EMIE_LMOUSE_LEFT_UP:
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case EMIE_MOUSE_MOVED:
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{
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if ( !event.MouseInput.isLeftPressed () )
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Dragging = false;
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if ( !Dragging )
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{
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if ( event.MouseInput.Event == EMIE_MOUSE_MOVED )
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break;
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return isInside;
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}
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if ( event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP )
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Dragging = false;
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const s32 newPos = getPosFromMousePos(p);
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const s32 oldPos = Pos;
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if (!DraggedBySlider)
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{
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if ( isInside )
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{
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DraggedBySlider = SliderRect.isPointInside(p);
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TrayClick = !DraggedBySlider;
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}
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if (DraggedBySlider)
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{
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setPos(newPos);
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}
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else
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{
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TrayClick = false;
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if (event.MouseInput.Event == EMIE_MOUSE_MOVED)
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return isInside;
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}
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}
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if (DraggedBySlider)
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{
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setPos(newPos);
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}
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else
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{
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DesiredPos = newPos;
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}
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if (Pos != oldPos && Parent)
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{
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SEvent newEvent;
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newEvent.EventType = EET_GUI_EVENT;
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newEvent.GUIEvent.Caller = this;
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newEvent.GUIEvent.Element = 0;
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newEvent.GUIEvent.EventType = EGET_SCROLL_BAR_CHANGED;
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Parent->OnEvent(newEvent);
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}
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return isInside;
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} break;
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default:
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break;
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}
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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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return IGUIElement::OnEvent(event);
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}
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void CGUIScrollBar::OnPostRender(u32 timeMs)
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{
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if (Dragging && !DraggedBySlider && TrayClick && timeMs > LastChange + 200)
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{
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LastChange = timeMs;
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const s32 oldPos = Pos;
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if (DesiredPos >= Pos + LargeStep)
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setPos(Pos + LargeStep);
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else
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if (DesiredPos <= Pos - LargeStep)
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setPos(Pos - LargeStep);
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else
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if (DesiredPos >= Pos - LargeStep && DesiredPos <= Pos + LargeStep)
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setPos(DesiredPos);
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if (Pos != oldPos && Parent)
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{
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SEvent newEvent;
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newEvent.EventType = EET_GUI_EVENT;
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newEvent.GUIEvent.Caller = this;
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newEvent.GUIEvent.Element = 0;
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newEvent.GUIEvent.EventType = EGET_SCROLL_BAR_CHANGED;
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Parent->OnEvent(newEvent);
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}
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}
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}
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//! draws the element and its children
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void CGUIScrollBar::draw()
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{
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if (!IsVisible)
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return;
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IGUISkin* skin = Environment->getSkin();
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if (!skin)
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return;
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video::SColor iconColor = skin->getColor(isEnabled() ? EGDC_WINDOW_SYMBOL : EGDC_GRAY_WINDOW_SYMBOL);
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if ( iconColor != CurrentIconColor )
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{
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refreshControls();
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}
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SliderRect = AbsoluteRect;
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// draws the background
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skin->draw2DRectangle(this, skin->getColor(EGDC_SCROLLBAR), SliderRect, &AbsoluteClippingRect);
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if ( core::isnotzero ( range() ) )
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{
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// recalculate slider rectangle
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if (Horizontal)
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{
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SliderRect.UpperLeftCorner.X = AbsoluteRect.UpperLeftCorner.X + DrawPos + RelativeRect.getHeight() - DrawHeight/2;
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SliderRect.LowerRightCorner.X = SliderRect.UpperLeftCorner.X + DrawHeight;
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}
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else
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{
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SliderRect.UpperLeftCorner.Y = AbsoluteRect.UpperLeftCorner.Y + DrawPos + RelativeRect.getWidth() - DrawHeight/2;
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SliderRect.LowerRightCorner.Y = SliderRect.UpperLeftCorner.Y + DrawHeight;
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}
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skin->draw3DButtonPaneStandard(this, SliderRect, &AbsoluteClippingRect);
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}
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// draw buttons
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IGUIElement::draw();
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}
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void CGUIScrollBar::updateAbsolutePosition()
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{
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IGUIElement::updateAbsolutePosition();
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// todo: properly resize
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refreshControls();
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setPos ( Pos );
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}
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//!
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s32 CGUIScrollBar::getPosFromMousePos(const core::position2di &pos) const
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{
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f32 w, p;
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if (Horizontal)
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{
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w = RelativeRect.getWidth() - f32(RelativeRect.getHeight())*3.0f;
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p = pos.X - AbsoluteRect.UpperLeftCorner.X - RelativeRect.getHeight()*1.5f;
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}
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else
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{
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w = RelativeRect.getHeight() - f32(RelativeRect.getWidth())*3.0f;
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p = pos.Y - AbsoluteRect.UpperLeftCorner.Y - RelativeRect.getWidth()*1.5f;
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}
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return (s32) ( p/w * range() ) + Min;
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}
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//! sets the position of the scrollbar
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void CGUIScrollBar::setPos(s32 pos)
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{
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Pos = core::s32_clamp ( pos, Min, Max );
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if ( core::isnotzero ( range() ) )
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{
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if (Horizontal)
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{
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f32 f = (RelativeRect.getWidth() - ((f32)RelativeRect.getHeight()*3.0f)) / range();
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DrawPos = (s32)( ( ( Pos - Min ) * f) + ((f32)RelativeRect.getHeight() * 0.5f));
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DrawHeight = RelativeRect.getHeight();
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}
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else
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{
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f32 f = (RelativeRect.getHeight() - ((f32)RelativeRect.getWidth()*3.0f)) / range();
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DrawPos = (s32)( ( ( Pos - Min ) * f) + ((f32)RelativeRect.getWidth() * 0.5f));
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DrawHeight = RelativeRect.getWidth();
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}
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}
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}
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//! gets the small step value
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s32 CGUIScrollBar::getSmallStep() const
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{
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return SmallStep;
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}
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//! sets the small step value
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void CGUIScrollBar::setSmallStep(s32 step)
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{
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if (step > 0)
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SmallStep = step;
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else
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SmallStep = 10;
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}
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//! gets the small step value
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s32 CGUIScrollBar::getLargeStep() const
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{
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return LargeStep;
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}
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//! sets the small step value
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void CGUIScrollBar::setLargeStep(s32 step)
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{
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if (step > 0)
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LargeStep = step;
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else
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LargeStep = 50;
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}
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//! gets the maximum value of the scrollbar.
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s32 CGUIScrollBar::getMax() const
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{
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return Max;
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}
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//! sets the maximum value of the scrollbar.
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void CGUIScrollBar::setMax(s32 max)
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{
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Max = max;
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if ( Min > Max )
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Min = Max;
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bool enable = core::isnotzero ( range() );
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UpButton->setEnabled(enable);
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DownButton->setEnabled(enable);
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setPos(Pos);
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}
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//! gets the minimum value of the scrollbar.
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s32 CGUIScrollBar::getMin() const
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{
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return Min;
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}
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//! sets the minimum value of the scrollbar.
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void CGUIScrollBar::setMin(s32 min)
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{
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Min = min;
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if ( Max < Min )
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Max = Min;
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bool enable = core::isnotzero ( range() );
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UpButton->setEnabled(enable);
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DownButton->setEnabled(enable);
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setPos(Pos);
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}
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//! gets the current position of the scrollbar
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s32 CGUIScrollBar::getPos() const
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{
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return Pos;
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}
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//! refreshes the position and text on child buttons
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void CGUIScrollBar::refreshControls()
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{
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CurrentIconColor = video::SColor(255,255,255,255);
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IGUISkin* skin = Environment->getSkin();
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IGUISpriteBank* sprites = 0;
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if (skin)
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{
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sprites = skin->getSpriteBank();
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CurrentIconColor = skin->getColor(isEnabled() ? EGDC_WINDOW_SYMBOL : EGDC_GRAY_WINDOW_SYMBOL);
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}
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if (Horizontal)
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{
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const s32 h = RelativeRect.getHeight();
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const s32 w = (h < RelativeRect.getWidth() / 2) ? h : RelativeRect.getWidth() / 2;
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if (!UpButton)
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{
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UpButton = new CGUIButton(Environment, this, -1, core::rect<s32>(0,0, w, h), NoClip);
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UpButton->setSubElement(true);
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UpButton->setTabStop(false);
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}
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if (sprites)
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{
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UpButton->setSpriteBank(sprites);
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UpButton->setSprite(EGBS_BUTTON_UP, skin->getIcon(EGDI_CURSOR_LEFT), CurrentIconColor);
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UpButton->setSprite(EGBS_BUTTON_DOWN, skin->getIcon(EGDI_CURSOR_LEFT), CurrentIconColor);
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}
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UpButton->setRelativePosition(core::rect<s32>(0,0, w, h));
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UpButton->setAlignment(EGUIA_UPPERLEFT, EGUIA_UPPERLEFT, EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT);
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if (!DownButton)
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{
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DownButton = new CGUIButton(Environment, this, -1, core::rect<s32>(RelativeRect.getWidth()-w, 0, RelativeRect.getWidth(), h), NoClip);
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DownButton->setSubElement(true);
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DownButton->setTabStop(false);
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}
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if (sprites)
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{
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DownButton->setSpriteBank(sprites);
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DownButton->setSprite(EGBS_BUTTON_UP, skin->getIcon(EGDI_CURSOR_RIGHT), CurrentIconColor);
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DownButton->setSprite(EGBS_BUTTON_DOWN, skin->getIcon(EGDI_CURSOR_RIGHT), CurrentIconColor);
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}
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DownButton->setRelativePosition(core::rect<s32>(RelativeRect.getWidth()-w, 0, RelativeRect.getWidth(), h));
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DownButton->setAlignment(EGUIA_LOWERRIGHT, EGUIA_LOWERRIGHT, EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT);
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}
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else
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{
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const s32 w = RelativeRect.getWidth();
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const s32 h = (w < RelativeRect.getHeight() / 2) ? w : RelativeRect.getHeight() / 2;
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if (!UpButton)
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{
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UpButton = new CGUIButton(Environment, this, -1, core::rect<s32>(0,0, w, h), NoClip);
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UpButton->setSubElement(true);
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UpButton->setTabStop(false);
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}
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if (sprites)
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{
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UpButton->setSpriteBank(sprites);
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UpButton->setSprite(EGBS_BUTTON_UP, skin->getIcon(EGDI_CURSOR_UP), CurrentIconColor);
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UpButton->setSprite(EGBS_BUTTON_DOWN, skin->getIcon(EGDI_CURSOR_UP), CurrentIconColor);
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}
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UpButton->setRelativePosition(core::rect<s32>(0,0, w, h));
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UpButton->setAlignment(EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT, EGUIA_UPPERLEFT, EGUIA_UPPERLEFT);
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if (!DownButton)
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{
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DownButton = new CGUIButton(Environment, this, -1, core::rect<s32>(0,RelativeRect.getHeight()-h, w, RelativeRect.getHeight()), NoClip);
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DownButton->setSubElement(true);
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DownButton->setTabStop(false);
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}
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if (sprites)
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{
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DownButton->setSpriteBank(sprites);
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DownButton->setSprite(EGBS_BUTTON_UP, skin->getIcon(EGDI_CURSOR_DOWN), CurrentIconColor);
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DownButton->setSprite(EGBS_BUTTON_DOWN, skin->getIcon(EGDI_CURSOR_DOWN), CurrentIconColor);
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}
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DownButton->setRelativePosition(core::rect<s32>(0,RelativeRect.getHeight()-h, w, RelativeRect.getHeight()));
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DownButton->setAlignment(EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT, EGUIA_LOWERRIGHT, EGUIA_LOWERRIGHT);
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}
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}
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} // end namespace gui
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} // end namespace irr
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#endif // _IRR_COMPILE_WITH_GUI_
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