irrlicht/source/Irrlicht/CGUIContextMenu.cpp

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CGUIContextMenu.h"
#ifdef _IRR_COMPILE_WITH_GUI_
#include "IGUISkin.h"
#include "IGUIEnvironment.h"
#include "IVideoDriver.h"
#include "IGUIFont.h"
#include "IGUISpriteBank.h"
#include "os.h"
namespace irr
{
namespace gui
{
//! constructor
CGUIContextMenu::CGUIContextMenu(IGUIEnvironment* environment,
IGUIElement* parent, s32 id,
core::rect<s32> rectangle, bool getFocus, bool allowFocus)
: IGUIContextMenu(environment, parent, id, rectangle), EventParent(0), LastFont(0),
CloseHandling(ECMC_REMOVE), HighLighted(-1), ChangeTime(0), AllowFocus(allowFocus)
{
#ifdef _DEBUG
setDebugName("CGUIContextMenu");
#endif
Pos = rectangle.UpperLeftCorner;
recalculateSize();
if (getFocus)
Environment->setFocus(this);
setNotClipped(true);
}
//! destructor
CGUIContextMenu::~CGUIContextMenu()
{
for (u32 i=0; i<Items.size(); ++i)
if (Items[i].SubMenu)
Items[i].SubMenu->drop();
if (LastFont)
LastFont->drop();
}
//! set behavior when menus are closed
void CGUIContextMenu::setCloseHandling(ECONTEXT_MENU_CLOSE onClose)
{
CloseHandling = onClose;
}
//! get current behavior when the menu will be closed
ECONTEXT_MENU_CLOSE CGUIContextMenu::getCloseHandling() const
{
return CloseHandling;
}
//! Returns amount of menu items
u32 CGUIContextMenu::getItemCount() const
{
return Items.size();
}
//! Adds a menu item.
u32 CGUIContextMenu::addItem(const wchar_t* text, s32 commandId, bool enabled, bool hasSubMenu, bool checked, bool autoChecking)
{
return insertItem(Items.size(), text, commandId, enabled, hasSubMenu, checked, autoChecking);
}
//! Insert a menu item at specified position.
u32 CGUIContextMenu::insertItem(u32 idx, const wchar_t* text, s32 commandId, bool enabled,
bool hasSubMenu, bool checked, bool autoChecking)
{
SItem s;
s.Enabled = enabled;
s.Checked = checked;
s.AutoChecking = autoChecking;
s.Text = text;
s.IsSeparator = (text == 0);
s.SubMenu = 0;
s.CommandId = commandId;
s.PosY = 0;
if (hasSubMenu)
{
s.SubMenu = new CGUIContextMenu(Environment, this, commandId,
core::rect<s32>(0,0,100,100), false, false);
s.SubMenu->setVisible(false);
}
u32 result = idx;
if ( idx < Items.size() )
{
Items.insert(s, idx);
}
else
{
Items.push_back(s);
result = Items.size() - 1;
}
recalculateSize();
return result;
}
s32 CGUIContextMenu::findItemWithCommandId(s32 commandId, u32 idxStartSearch) const
{
for ( u32 i=idxStartSearch; i<Items.size(); ++i )
{
if ( Items[i].CommandId == commandId )
{
return (s32)i;
}
}
return -1;
}
//! Adds a sub menu from an element that already exists.
void CGUIContextMenu::setSubMenu(u32 index, CGUIContextMenu* menu)
{
if (index >= Items.size())
return;
if (menu)
menu->grab();
if (Items[index].SubMenu)
Items[index].SubMenu->drop();
Items[index].SubMenu = menu;
if (menu)
{
menu->setVisible(false);
menu->AllowFocus = false;
if ( Environment->getFocus() == menu )
{
Environment->setFocus( this );
}
}
recalculateSize();
}
//! Adds a separator item to the menu
void CGUIContextMenu::addSeparator()
{
addItem(0, -1, true, false, false, false);
}
//! Returns text of the menu item.
const wchar_t* CGUIContextMenu::getItemText(u32 idx) const
{
if (idx >= Items.size())
return 0;
return Items[idx].Text.c_str();
}
//! Sets text of the menu item.
void CGUIContextMenu::setItemText(u32 idx, const wchar_t* text)
{
if (idx >= Items.size())
return;
Items[idx].Text = text;
recalculateSize();
}
//! should the element change the checked status on clicking
void CGUIContextMenu::setItemAutoChecking(u32 idx, bool autoChecking)
{
if ( idx >= Items.size())
return;
Items[idx].AutoChecking = autoChecking;
}
//! does the element change the checked status on clicking
bool CGUIContextMenu::getItemAutoChecking(u32 idx) const
{
if (idx >= Items.size())
return false;
return Items[idx].AutoChecking;
}
//! Returns if a menu item is enabled
bool CGUIContextMenu::isItemEnabled(u32 idx) const
{
if (idx >= Items.size())
{
return false;
}
return Items[idx].Enabled;
}
//! Returns if a menu item is checked
bool CGUIContextMenu::isItemChecked(u32 idx) const
{
if (idx >= Items.size())
{
return false;
}
return Items[idx].Checked;
}
//! Sets if the menu item should be enabled.
void CGUIContextMenu::setItemEnabled(u32 idx, bool enabled)
{
if (idx >= Items.size())
return;
Items[idx].Enabled = enabled;
}
//! Sets if the menu item should be checked.
void CGUIContextMenu::setItemChecked(u32 idx, bool checked )
{
if (idx >= Items.size())
return;
Items[idx].Checked = checked;
}
//! Removes a menu item
void CGUIContextMenu::removeItem(u32 idx)
{
if (idx >= Items.size())
return;
if (Items[idx].SubMenu)
{
Items[idx].SubMenu->drop();
Items[idx].SubMenu = 0;
}
Items.erase(idx);
recalculateSize();
}
//! Removes all menu items
void CGUIContextMenu::removeAllItems()
{
for (u32 i=0; i<Items.size(); ++i)
if (Items[i].SubMenu)
Items[i].SubMenu->drop();
Items.clear();
recalculateSize();
}
//! called if an event happened.
bool CGUIContextMenu::OnEvent(const SEvent& event)
{
if (isEnabled())
{
switch(event.EventType)
{
case EET_GUI_EVENT:
switch(event.GUIEvent.EventType)
{
case EGET_ELEMENT_FOCUS_LOST:
if (event.GUIEvent.Caller == this && !isMyChild(event.GUIEvent.Element) && AllowFocus)
{
// set event parent of submenus
IGUIElement * p = EventParent ? EventParent : Parent;
if ( p ) // can be 0 when element got removed already
{
setEventParent(p);
SEvent eventClose;
eventClose.EventType = EET_GUI_EVENT;
eventClose.GUIEvent.Caller = this;
eventClose.GUIEvent.Element = 0;
eventClose.GUIEvent.EventType = EGET_ELEMENT_CLOSED;
if ( !p->OnEvent(eventClose) )
{
if ( CloseHandling & ECMC_HIDE )
{
setVisible(false);
}
if ( CloseHandling & ECMC_REMOVE )
{
remove();
}
}
}
return false;
}
break;
case EGET_ELEMENT_FOCUSED:
if (event.GUIEvent.Caller == this && !AllowFocus)
{
return true;
}
break;
default:
break;
}
break;
case EET_MOUSE_INPUT_EVENT:
switch(event.MouseInput.Event)
{
case EMIE_LMOUSE_LEFT_UP:
{
// menu might be removed if it loses focus in sendClick, so grab a reference
grab();
const u32 t = sendClick(core::position2d<s32>(event.MouseInput.X, event.MouseInput.Y));
if ((t==0 || t==1) && Environment->hasFocus(this))
Environment->removeFocus(this);
drop();
}
return true;
case EMIE_LMOUSE_PRESSED_DOWN:
return true;
case EMIE_MOUSE_MOVED:
if (Environment->hasFocus(this))
highlight(core::position2d<s32>(event.MouseInput.X, event.MouseInput.Y), true);
break;
default:
break;
}
break;
default:
break;
}
}
return IGUIElement::OnEvent(event);
}
//! Sets the visible state of this element.
void CGUIContextMenu::setVisible(bool visible)
{
HighLighted = -1;
ChangeTime = os::Timer::getTime();
for (u32 j=0; j<Items.size(); ++j)
if (Items[j].SubMenu)
Items[j].SubMenu->setVisible(false);
IGUIElement::setVisible(visible);
}
//! sends a click Returns:
//! 0 if click went outside of the element,
//! 1 if a valid button was clicked,
//! 2 if a nonclickable element was clicked
u32 CGUIContextMenu::sendClick(const core::position2d<s32>& p)
{
u32 t = 0;
// get number of open submenu
s32 openmenu = -1;
s32 j;
for (j=0; j<(s32)Items.size(); ++j)
if (Items[j].SubMenu && Items[j].SubMenu->isVisible())
{
openmenu = j;
break;
}
// delegate click operation to submenu
if (openmenu != -1)
{
t = Items[j].SubMenu->sendClick(p);
if (t != 0)
return t; // clicked something
}
// check click on myself
if (isPointInside(p) &&
(u32)HighLighted < Items.size())
{
if (!Items[HighLighted].Enabled ||
Items[HighLighted].IsSeparator ||
Items[HighLighted].SubMenu)
return 2;
if ( Items[HighLighted].AutoChecking )
{
Items[HighLighted].Checked = Items[HighLighted].Checked ? false : true;
}
SEvent event;
event.EventType = EET_GUI_EVENT;
event.GUIEvent.Caller = this;
event.GUIEvent.Element = 0;
event.GUIEvent.EventType = EGET_MENU_ITEM_SELECTED;
if (EventParent)
EventParent->OnEvent(event);
else if (Parent)
Parent->OnEvent(event);
return 1;
}
return 0;
}
//! returns true, if an element was highlighted
bool CGUIContextMenu::highlight(const core::position2d<s32>& p, bool canOpenSubMenu)
{
if (!isEnabled())
{
return false;
}
// get number of open submenu
s32 openmenu = -1;
s32 i;
for (i=0; i<(s32)Items.size(); ++i)
if (Items[i].Enabled && Items[i].SubMenu && Items[i].SubMenu->isVisible())
{
openmenu = i;
break;
}
// delegate highlight operation to submenu
if (openmenu != -1)
{
if (Items[openmenu].Enabled && Items[openmenu].SubMenu->highlight(p, canOpenSubMenu))
{
HighLighted = openmenu;
ChangeTime = os::Timer::getTime();
return true;
}
}
// highlight myself
for (i=0; i<(s32)Items.size(); ++i)
{
if (Items[i].Enabled && getHRect(Items[i], AbsoluteRect).isPointInside(p))
{
HighLighted = i;
ChangeTime = os::Timer::getTime();
// make submenus visible/invisible
for (s32 j=0; j<(s32)Items.size(); ++j)
if (Items[j].SubMenu)
{
if ( j == i && canOpenSubMenu && Items[j].Enabled )
Items[j].SubMenu->setVisible(true);
else if ( j != i )
Items[j].SubMenu->setVisible(false);
}
return true;
}
}
HighLighted = openmenu;
return false;
}
//! returns the item highlight-area
core::rect<s32> CGUIContextMenu::getHRect(const SItem& i, const core::rect<s32>& absolute) const
{
core::rect<s32> r = absolute;
r.UpperLeftCorner.Y += i.PosY;
r.LowerRightCorner.Y = r.UpperLeftCorner.Y + i.Dim.Height;
return r;
}
//! Gets drawing rect of Item
core::rect<s32> CGUIContextMenu::getRect(const SItem& i, const core::rect<s32>& absolute) const
{
core::rect<s32> r = absolute;
r.UpperLeftCorner.Y += i.PosY;
r.LowerRightCorner.Y = r.UpperLeftCorner.Y + i.Dim.Height;
r.UpperLeftCorner.X += 20;
return r;
}
//! draws the element and its children
void CGUIContextMenu::draw()
{
if (!IsVisible)
return;
IGUISkin* skin = Environment->getSkin();
if (!skin)
return;
IGUIFont* font = skin->getFont(EGDF_MENU);
if (font != LastFont)
{
if (LastFont)
LastFont->drop();
LastFont = font;
if (LastFont)
LastFont->grab();
recalculateSize();
}
IGUISpriteBank* sprites = skin->getSpriteBank();
core::rect<s32> rect = AbsoluteRect;
core::rect<s32>* clip = 0;
// draw frame
skin->draw3DMenuPane(this, AbsoluteRect, clip);
// loop through all menu items
rect = AbsoluteRect;
s32 y = AbsoluteRect.UpperLeftCorner.Y;
for (s32 i=0; i<(s32)Items.size(); ++i)
{
if (Items[i].IsSeparator)
{
// draw separator
rect = AbsoluteRect;
rect.UpperLeftCorner.Y += Items[i].PosY + 3;
rect.LowerRightCorner.Y = rect.UpperLeftCorner.Y + 1;
rect.UpperLeftCorner.X += 5;
rect.LowerRightCorner.X -= 5;
skin->draw2DRectangle(this, skin->getColor(EGDC_3D_SHADOW), rect, clip);
rect.LowerRightCorner.Y += 1;
rect.UpperLeftCorner.Y += 1;
skin->draw2DRectangle(this, skin->getColor(EGDC_3D_HIGH_LIGHT), rect, clip);
y += 10;
}
else
{
rect = getRect(Items[i], AbsoluteRect);
// draw highlighted
if (i == HighLighted && Items[i].Enabled)
{
core::rect<s32> r = AbsoluteRect;
r.LowerRightCorner.Y = rect.LowerRightCorner.Y;
r.UpperLeftCorner.Y = rect.UpperLeftCorner.Y;
r.LowerRightCorner.X -= 5;
r.UpperLeftCorner.X += 5;
skin->draw2DRectangle(this, skin->getColor(EGDC_HIGH_LIGHT), r, clip);
}
// draw text
EGUI_DEFAULT_COLOR c = EGDC_BUTTON_TEXT;
if (i == HighLighted)
c = EGDC_HIGH_LIGHT_TEXT;
if (!Items[i].Enabled)
c = EGDC_GRAY_TEXT;
if (font)
font->draw(Items[i].Text.c_str(), rect,
skin->getColor(c), false, true, clip);
// draw submenu symbol
if (Items[i].SubMenu && sprites)
{
core::rect<s32> r = rect;
r.UpperLeftCorner.X = r.LowerRightCorner.X - 15;
sprites->draw2DSprite(skin->getIcon(EGDI_CURSOR_RIGHT),
r.getCenter(), clip, skin->getColor(c),
(i == HighLighted) ? ChangeTime : 0,
(i == HighLighted) ? os::Timer::getTime() : 0,
(i == HighLighted), true);
}
// draw checked symbol
if (Items[i].Checked && sprites)
{
core::rect<s32> r = rect;
r.LowerRightCorner.X = r.UpperLeftCorner.X - 15;
r.UpperLeftCorner.X = r.LowerRightCorner.X + 15;
sprites->draw2DSprite(skin->getIcon(EGDI_CHECK_BOX_CHECKED),
r.getCenter(), clip, skin->getColor(c),
(i == HighLighted) ? ChangeTime : 0,
(i == HighLighted) ? os::Timer::getTime() : 0,
(i == HighLighted), true);
}
}
}
IGUIElement::draw();
}
void CGUIContextMenu::recalculateSize()
{
IGUIFont* font = Environment->getSkin()->getFont(EGDF_MENU);
if (!font)
return;
core::rect<s32> rect;
rect.UpperLeftCorner = RelativeRect.UpperLeftCorner;
u32 width = 100;
u32 height = 3;
u32 i;
for (i=0; i<Items.size(); ++i)
{
if (Items[i].IsSeparator)
{
Items[i].Dim.Width = 100;
Items[i].Dim.Height = 10;
}
else
{
Items[i].Dim = font->getDimension(Items[i].Text.c_str());
Items[i].Dim.Width += 40;
if (Items[i].Dim.Width > width)
width = Items[i].Dim.Width;
}
Items[i].PosY = height;
height += Items[i].Dim.Height;
}
height += 5;
if (height < 10)
height = 10;
rect.LowerRightCorner.X = RelativeRect.UpperLeftCorner.X + width;
rect.LowerRightCorner.Y = RelativeRect.UpperLeftCorner.Y + height;
setRelativePosition(rect);
// recalculate submenus
for (i=0; i<Items.size(); ++i)
{
if (Items[i].SubMenu)
{
// move submenu
const s32 w = Items[i].SubMenu->getAbsolutePosition().getWidth();
const s32 h = Items[i].SubMenu->getAbsolutePosition().getHeight();
core::rect<s32> subRect(width-5, Items[i].PosY, width+w-5, Items[i].PosY+h);
gui::IGUIElement * root = Environment->getRootGUIElement();
if ( root )
{
core::rect<s32> rectRoot( root->getAbsolutePosition() );
// if it would be drawn beyond the right border, then add it to the left side
if ( getAbsolutePosition().UpperLeftCorner.X+subRect.LowerRightCorner.X > rectRoot.LowerRightCorner.X )
{
subRect.UpperLeftCorner.X = -w;
subRect.LowerRightCorner.X = 0;
}
// if it would be drawn below bottom border, move it up, but not further than to top.
irr::s32 belowBottom = getAbsolutePosition().UpperLeftCorner.Y+subRect.LowerRightCorner.Y - rectRoot.LowerRightCorner.Y;
if ( belowBottom > 0 )
{
irr::s32 belowTop = getAbsolutePosition().UpperLeftCorner.Y+subRect.UpperLeftCorner.Y;
irr::s32 moveUp = belowBottom < belowTop ? belowBottom : belowTop;
subRect.UpperLeftCorner.Y -= moveUp;
subRect.LowerRightCorner.Y -= moveUp;
}
}
Items[i].SubMenu->setRelativePosition(subRect);
}
}
}
//! Returns the selected item in the menu
s32 CGUIContextMenu::getSelectedItem() const
{
return HighLighted;
}
//! \return Returns a pointer to the submenu of an item.
IGUIContextMenu* CGUIContextMenu::getSubMenu(u32 idx) const
{
if (idx >= Items.size())
return 0;
return Items[idx].SubMenu;
}
//! Returns command id of a menu item
s32 CGUIContextMenu::getItemCommandId(u32 idx) const
{
if (idx >= Items.size())
return -1;
return Items[idx].CommandId;
}
//! Sets the command id of a menu item
void CGUIContextMenu::setItemCommandId(u32 idx, s32 id)
{
if (idx >= Items.size())
return;
Items[idx].CommandId = id;
}
//! Writes attributes of the element.
void CGUIContextMenu::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options=0) const
{
IGUIElement::serializeAttributes(out,options);
out->addPosition2d("Position", Pos);
if (Parent->getType() == EGUIET_CONTEXT_MENU || Parent->getType() == EGUIET_MENU )
{
const IGUIContextMenu* const ptr = (const IGUIContextMenu*)Parent;
// find the position of this item in its parent's list
u32 i;
// VC6 needs the cast for this
for (i=0; (i<ptr->getItemCount()) && (ptr->getSubMenu(i) != (const IGUIContextMenu*)this); ++i)
; // do nothing
out->addInt("ParentItem", i);
}
out->addInt("CloseHandling", (s32)CloseHandling);
// write out the item list
out->addInt("ItemCount", Items.size());
core::stringc tmp;
for (u32 i=0; i < Items.size(); ++i)
{
tmp = "IsSeparator"; tmp += i;
out->addBool(tmp.c_str(), Items[i].IsSeparator);
if (!Items[i].IsSeparator)
{
tmp = "Text"; tmp += i;
out->addString(tmp.c_str(), Items[i].Text.c_str());
tmp = "CommandID"; tmp += i;
out->addInt(tmp.c_str(), Items[i].CommandId);
tmp = "Enabled"; tmp += i;
out->addBool(tmp.c_str(), Items[i].Enabled);
tmp = "Checked"; tmp += i;
out->addBool(tmp.c_str(), Items[i].Checked);
tmp = "AutoChecking"; tmp += i;
out->addBool(tmp.c_str(), Items[i].AutoChecking);
}
}
}
//! Reads attributes of the element
void CGUIContextMenu::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options=0)
{
IGUIElement::deserializeAttributes(in,options);
Pos = in->getAttributeAsPosition2d("Position");
// link to this item's parent
if (Parent && ( Parent->getType() == EGUIET_CONTEXT_MENU || Parent->getType() == EGUIET_MENU ) )
((CGUIContextMenu*)Parent)->setSubMenu(in->getAttributeAsInt("ParentItem"),this);
CloseHandling = (ECONTEXT_MENU_CLOSE)in->getAttributeAsInt("CloseHandling");
removeAllItems();
// read the item list
const s32 count = in->getAttributeAsInt("ItemCount");
for (s32 i=0; i<count; ++i)
{
core::stringc tmp;
core::stringw txt;
s32 commandid=-1;
bool enabled=true;
bool checked=false;
bool autochecking=false;
tmp = "IsSeparator"; tmp += i;
if ( in->existsAttribute(tmp.c_str()) && in->getAttributeAsBool(tmp.c_str()) )
addSeparator();
else
{
tmp = "Text"; tmp += i;
if ( in->existsAttribute(tmp.c_str()) )
txt = in->getAttributeAsStringW(tmp.c_str());
tmp = "CommandID"; tmp += i;
if ( in->existsAttribute(tmp.c_str()) )
commandid = in->getAttributeAsInt(tmp.c_str());
tmp = "Enabled"; tmp += i;
if ( in->existsAttribute(tmp.c_str()) )
enabled = in->getAttributeAsBool(tmp.c_str());
tmp = "Checked"; tmp += i;
if ( in->existsAttribute(tmp.c_str()) )
checked = in->getAttributeAsBool(tmp.c_str());
tmp = "AutoChecking"; tmp += i;
if ( in->existsAttribute(tmp.c_str()) )
autochecking = in->getAttributeAsBool(tmp.c_str());
addItem(core::stringw(txt.c_str()).c_str(), commandid, enabled, false, checked, autochecking);
}
}
recalculateSize();
}
// because sometimes the element has no parent at click time
void CGUIContextMenu::setEventParent(IGUIElement *parent)
{
EventParent = parent;
for (u32 i=0; i<Items.size(); ++i)
if (Items[i].SubMenu)
Items[i].SubMenu->setEventParent(parent);
}
bool CGUIContextMenu::hasOpenSubMenu() const
{
for (u32 i=0; i<Items.size(); ++i)
if (Items[i].SubMenu && Items[i].SubMenu->isVisible())
return true;
return false;
}
void CGUIContextMenu::closeAllSubMenus()
{
for (u32 i=0; i<Items.size(); ++i)
if (Items[i].SubMenu)
Items[i].SubMenu->setVisible(false);
//HighLighted = -1;
}
} // end namespace
} // end namespace
#endif // _IRR_COMPILE_WITH_GUI_