524 lines
12 KiB
C++
524 lines
12 KiB
C++
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// 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 "CGUIComboBox.h"
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#ifdef _IRR_COMPILE_WITH_GUI_
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#include "IGUIEnvironment.h"
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#include "IVideoDriver.h"
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#include "IGUISkin.h"
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#include "IGUIEnvironment.h"
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#include "IGUIFont.h"
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#include "IGUIButton.h"
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#include "CGUIListBox.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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CGUIComboBox::CGUIComboBox(IGUIEnvironment* environment, IGUIElement* parent,
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s32 id, core::rect<s32> rectangle)
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: IGUIComboBox(environment, parent, id, rectangle),
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ListButton(0), SelectedText(0), ListBox(0), LastFocus(0),
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Selected(-1), HAlign(EGUIA_UPPERLEFT), VAlign(EGUIA_CENTER), MaxSelectionRows(5), HasFocus(false)
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{
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#ifdef _DEBUG
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setDebugName("CGUIComboBox");
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#endif
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IGUISkin* skin = Environment->getSkin();
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s32 width = 15;
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if (skin)
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width = skin->getSize(EGDS_WINDOW_BUTTON_WIDTH);
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core::rect<s32> r;
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r.UpperLeftCorner.X = rectangle.getWidth() - width - 2;
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r.LowerRightCorner.X = rectangle.getWidth() - 2;
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r.UpperLeftCorner.Y = 2;
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r.LowerRightCorner.Y = rectangle.getHeight() - 2;
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ListButton = Environment->addButton(r, this, -1, L"");
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if (skin && skin->getSpriteBank())
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{
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ListButton->setSpriteBank(skin->getSpriteBank());
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ListButton->setSprite(EGBS_BUTTON_UP, skin->getIcon(EGDI_CURSOR_DOWN), skin->getColor(EGDC_WINDOW_SYMBOL));
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ListButton->setSprite(EGBS_BUTTON_DOWN, skin->getIcon(EGDI_CURSOR_DOWN), skin->getColor(EGDC_WINDOW_SYMBOL));
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}
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ListButton->setAlignment(EGUIA_LOWERRIGHT, EGUIA_LOWERRIGHT, EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT);
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ListButton->setSubElement(true);
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ListButton->setTabStop(false);
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r.UpperLeftCorner.X = 2;
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r.UpperLeftCorner.Y = 2;
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r.LowerRightCorner.X = RelativeRect.getWidth() - (ListButton->getAbsolutePosition().getWidth() + 2);
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r.LowerRightCorner.Y = RelativeRect.getHeight() - 2;
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SelectedText = Environment->addStaticText(L"", r, false, false, this, -1, false);
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SelectedText->setSubElement(true);
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SelectedText->setAlignment(EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT, EGUIA_UPPERLEFT, EGUIA_LOWERRIGHT);
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SelectedText->setTextAlignment(EGUIA_UPPERLEFT, EGUIA_CENTER);
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if (skin)
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SelectedText->setOverrideColor(skin->getColor(EGDC_BUTTON_TEXT));
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SelectedText->enableOverrideColor(true);
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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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}
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void CGUIComboBox::setTextAlignment(EGUI_ALIGNMENT horizontal, EGUI_ALIGNMENT vertical)
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{
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HAlign = horizontal;
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VAlign = vertical;
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SelectedText->setTextAlignment(horizontal, vertical);
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}
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//! Set the maximal number of rows for the selection listbox
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void CGUIComboBox::setMaxSelectionRows(u32 max)
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{
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MaxSelectionRows = max;
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// force recalculation of open listbox
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if (ListBox)
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{
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openCloseMenu();
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openCloseMenu();
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}
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}
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//! Get the maximimal number of rows for the selection listbox
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u32 CGUIComboBox::getMaxSelectionRows() const
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{
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return MaxSelectionRows;
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}
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//! Returns amount of items in box
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u32 CGUIComboBox::getItemCount() const
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{
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return Items.size();
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}
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//! returns string of an item. the idx may be a value from 0 to itemCount-1
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const wchar_t* CGUIComboBox::getItem(u32 idx) const
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{
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if (idx >= Items.size())
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return 0;
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return Items[idx].Name.c_str();
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}
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//! returns string of an item. the idx may be a value from 0 to itemCount-1
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u32 CGUIComboBox::getItemData(u32 idx) const
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{
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if (idx >= Items.size())
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return 0;
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return Items[idx].Data;
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}
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//! Returns index based on item data
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s32 CGUIComboBox::getIndexForItemData(u32 data ) const
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{
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for ( u32 i = 0; i < Items.size (); ++i )
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{
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if ( Items[i].Data == data )
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return i;
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}
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return -1;
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}
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//! Removes an item from the combo box.
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void CGUIComboBox::removeItem(u32 idx)
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{
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if (idx >= Items.size())
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return;
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if (Selected == (s32)idx)
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setSelected(-1);
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Items.erase(idx);
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}
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//! Returns caption of this element.
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const wchar_t* CGUIComboBox::getText() const
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{
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return getItem(Selected);
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}
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//! adds an item and returns the index of it
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u32 CGUIComboBox::addItem(const wchar_t* text, u32 data)
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{
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Items.push_back( SComboData ( text, data ) );
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if (Selected == -1)
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setSelected(0);
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return Items.size() - 1;
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}
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//! deletes all items in the combo box
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void CGUIComboBox::clear()
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{
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Items.clear();
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setSelected(-1);
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}
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//! returns id of selected item. returns -1 if no item is selected.
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s32 CGUIComboBox::getSelected() const
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{
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return Selected;
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}
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//! sets the selected item. Set this to -1 if no item should be selected
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void CGUIComboBox::setSelected(s32 idx)
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{
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if (idx < -1 || idx >= (s32)Items.size())
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return;
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Selected = idx;
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if (Selected == -1)
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SelectedText->setText(L"");
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else
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SelectedText->setText(Items[Selected].Name.c_str());
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}
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//! called if an event happened.
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bool CGUIComboBox::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 (ListBox && event.KeyInput.PressedDown && event.KeyInput.Key == KEY_ESCAPE)
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{
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// hide list box
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openCloseMenu();
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return true;
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}
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else
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if (event.KeyInput.Key == KEY_RETURN || event.KeyInput.Key == KEY_SPACE)
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{
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if (!event.KeyInput.PressedDown)
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{
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openCloseMenu();
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}
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ListButton->setPressed(ListBox == 0);
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return true;
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}
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else
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if (event.KeyInput.PressedDown)
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{
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s32 oldSelected = Selected;
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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_DOWN:
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setSelected(Selected+1);
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break;
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case KEY_UP:
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setSelected(Selected-1);
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break;
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case KEY_HOME:
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case KEY_PRIOR:
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setSelected(0);
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break;
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case KEY_END:
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case KEY_NEXT:
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setSelected((s32)Items.size()-1);
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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 (Selected <0)
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setSelected(0);
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if (Selected >= (s32)Items.size())
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setSelected((s32)Items.size() -1);
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if (Selected != oldSelected)
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{
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sendSelectionChangedEvent();
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return true;
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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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switch(event.GUIEvent.EventType)
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{
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case EGET_ELEMENT_FOCUS_LOST:
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if (ListBox &&
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(Environment->hasFocus(ListBox) || ListBox->isMyChild(event.GUIEvent.Caller) ) &&
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event.GUIEvent.Element != this &&
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!isMyChild(event.GUIEvent.Element) &&
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!ListBox->isMyChild(event.GUIEvent.Element))
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{
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openCloseMenu();
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}
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break;
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case EGET_BUTTON_CLICKED:
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if (event.GUIEvent.Caller == ListButton)
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{
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openCloseMenu();
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return true;
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}
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break;
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case EGET_LISTBOX_SELECTED_AGAIN:
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case EGET_LISTBOX_CHANGED:
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if (event.GUIEvent.Caller == ListBox)
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{
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setSelected(ListBox->getSelected());
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if (Selected <0 || Selected >= (s32)Items.size())
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setSelected(-1);
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openCloseMenu();
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sendSelectionChangedEvent();
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}
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return true;
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default:
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break;
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}
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break;
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case EET_MOUSE_INPUT_EVENT:
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switch(event.MouseInput.Event)
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{
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case EMIE_LMOUSE_PRESSED_DOWN:
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{
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core::position2d<s32> p(event.MouseInput.X, event.MouseInput.Y);
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// send to list box
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if (ListBox && ListBox->isPointInside(p) && ListBox->OnEvent(event))
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return true;
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return true;
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}
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case EMIE_LMOUSE_LEFT_UP:
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{
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core::position2d<s32> p(event.MouseInput.X, event.MouseInput.Y);
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// send to list box
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if (!(ListBox &&
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ListBox->getAbsolutePosition().isPointInside(p) &&
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ListBox->OnEvent(event)))
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{
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openCloseMenu();
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}
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return true;
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}
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case EMIE_MOUSE_WHEEL:
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{
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s32 oldSelected = Selected;
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setSelected( Selected + ((event.MouseInput.Wheel < 0) ? 1 : -1));
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if (Selected <0)
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setSelected(0);
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if (Selected >= (s32)Items.size())
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setSelected((s32)Items.size() -1);
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if (Selected != oldSelected)
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{
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sendSelectionChangedEvent();
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return true;
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}
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}
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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 CGUIComboBox::sendSelectionChangedEvent()
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{
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if (Parent)
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{
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SEvent event;
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event.EventType = EET_GUI_EVENT;
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event.GUIEvent.Caller = this;
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event.GUIEvent.Element = 0;
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event.GUIEvent.EventType = EGET_COMBO_BOX_CHANGED;
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Parent->OnEvent(event);
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}
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}
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//! draws the element and its children
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void CGUIComboBox::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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IGUIElement *currentFocus = Environment->getFocus();
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if (currentFocus != LastFocus)
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{
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HasFocus = currentFocus == this || isMyChild(currentFocus);
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LastFocus = currentFocus;
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}
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// set colors each time as skin-colors can be changed
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SelectedText->setBackgroundColor(skin->getColor(EGDC_HIGH_LIGHT));
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if(isEnabled())
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{
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SelectedText->setDrawBackground(HasFocus);
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SelectedText->setOverrideColor(skin->getColor(HasFocus ? EGDC_HIGH_LIGHT_TEXT : EGDC_BUTTON_TEXT));
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}
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else
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{
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SelectedText->setDrawBackground(false);
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SelectedText->setOverrideColor(skin->getColor(EGDC_GRAY_TEXT));
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}
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ListButton->setSprite(EGBS_BUTTON_UP, skin->getIcon(EGDI_CURSOR_DOWN), skin->getColor(isEnabled() ? EGDC_WINDOW_SYMBOL : EGDC_GRAY_WINDOW_SYMBOL));
|
||
|
|
ListButton->setSprite(EGBS_BUTTON_DOWN, skin->getIcon(EGDI_CURSOR_DOWN), skin->getColor(isEnabled() ? EGDC_WINDOW_SYMBOL : EGDC_GRAY_WINDOW_SYMBOL));
|
||
|
|
|
||
|
|
|
||
|
|
core::rect<s32> frameRect(AbsoluteRect);
|
||
|
|
|
||
|
|
// draw the border
|
||
|
|
|
||
|
|
skin->draw3DSunkenPane(this, skin->getColor(EGDC_3D_HIGH_LIGHT),
|
||
|
|
true, true, frameRect, &AbsoluteClippingRect);
|
||
|
|
|
||
|
|
// draw children
|
||
|
|
IGUIElement::draw();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void CGUIComboBox::openCloseMenu()
|
||
|
|
{
|
||
|
|
if (ListBox)
|
||
|
|
{
|
||
|
|
// close list box
|
||
|
|
Environment->setFocus(this);
|
||
|
|
ListBox->remove();
|
||
|
|
ListBox = 0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (Parent)
|
||
|
|
Parent->bringToFront(this);
|
||
|
|
|
||
|
|
IGUISkin* skin = Environment->getSkin();
|
||
|
|
u32 h = Items.size();
|
||
|
|
|
||
|
|
if (h > getMaxSelectionRows())
|
||
|
|
h = getMaxSelectionRows();
|
||
|
|
if (h == 0)
|
||
|
|
h = 1;
|
||
|
|
|
||
|
|
IGUIFont* font = skin->getFont();
|
||
|
|
if (font)
|
||
|
|
h *= (font->getDimension(L"A").Height + 4);
|
||
|
|
|
||
|
|
// open list box
|
||
|
|
core::rect<s32> r(0, AbsoluteRect.getHeight(),
|
||
|
|
AbsoluteRect.getWidth(), AbsoluteRect.getHeight() + h);
|
||
|
|
|
||
|
|
ListBox = new CGUIListBox(Environment, this, -1, r, false, true, true);
|
||
|
|
ListBox->setSubElement(true);
|
||
|
|
ListBox->setNotClipped(true);
|
||
|
|
ListBox->drop();
|
||
|
|
|
||
|
|
// ensure that list box is always completely visible
|
||
|
|
if (ListBox->getAbsolutePosition().LowerRightCorner.Y > Environment->getRootGUIElement()->getAbsolutePosition().getHeight())
|
||
|
|
ListBox->setRelativePosition( core::rect<s32>(0, -ListBox->getAbsolutePosition().getHeight(), AbsoluteRect.getWidth(), 0) );
|
||
|
|
|
||
|
|
for (s32 i=0; i<(s32)Items.size(); ++i)
|
||
|
|
ListBox->addItem(Items[i].Name.c_str());
|
||
|
|
|
||
|
|
ListBox->setSelected(Selected);
|
||
|
|
|
||
|
|
// set focus
|
||
|
|
Environment->setFocus(ListBox);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//! Writes attributes of the element.
|
||
|
|
void CGUIComboBox::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options=0) const
|
||
|
|
{
|
||
|
|
IGUIComboBox::serializeAttributes(out,options);
|
||
|
|
|
||
|
|
out->addEnum ("HTextAlign", HAlign, GUIAlignmentNames);
|
||
|
|
out->addEnum ("VTextAlign", VAlign, GUIAlignmentNames);
|
||
|
|
out->addInt("MaxSelectionRows", (s32)MaxSelectionRows );
|
||
|
|
|
||
|
|
out->addInt ("Selected", Selected );
|
||
|
|
out->addInt ("ItemCount", Items.size());
|
||
|
|
for (u32 i=0; i < Items.size(); ++i)
|
||
|
|
{
|
||
|
|
core::stringc s = "Item";
|
||
|
|
s += i;
|
||
|
|
s += "Text";
|
||
|
|
out->addString(s.c_str(), Items[i].Name.c_str());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//! Reads attributes of the element
|
||
|
|
void CGUIComboBox::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options=0)
|
||
|
|
{
|
||
|
|
IGUIComboBox::deserializeAttributes(in,options);
|
||
|
|
|
||
|
|
setTextAlignment( (EGUI_ALIGNMENT) in->getAttributeAsEnumeration("HTextAlign", GUIAlignmentNames),
|
||
|
|
(EGUI_ALIGNMENT) in->getAttributeAsEnumeration("VTextAlign", GUIAlignmentNames));
|
||
|
|
setMaxSelectionRows( (u32)(in->getAttributeAsInt("MaxSelectionRows")) );
|
||
|
|
|
||
|
|
// clear the list
|
||
|
|
clear();
|
||
|
|
// get item count
|
||
|
|
u32 c = in->getAttributeAsInt("ItemCount");
|
||
|
|
// add items
|
||
|
|
for (u32 i=0; i < c; ++i)
|
||
|
|
{
|
||
|
|
core::stringc s = "Item";
|
||
|
|
s += i;
|
||
|
|
s += "Text";
|
||
|
|
addItem(in->getAttributeAsStringW(s.c_str()).c_str(), 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
setSelected(in->getAttributeAsInt("Selected"));
|
||
|
|
}
|
||
|
|
|
||
|
|
} // end namespace gui
|
||
|
|
} // end namespace irr
|
||
|
|
|
||
|
|
|
||
|
|
#endif // _IRR_COMPILE_WITH_GUI_
|
||
|
|
|