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SdkTrays.h
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SdkTrays.h
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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/
Copyright (c) 2000-2014 Torus Knot Software Ltd
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#ifndef __SdkTrays_H__
#define __SdkTrays_H__
#include "Ogre.h"
#include "Overlay/OgreOverlaySystem.h"
#include <math.h>
#include "OgreTimer.h"
#include "InputContext.h"
#if OGRE_COMPILER == OGRE_COMPILER_MSVC
// TODO - remove this
# pragma warning (disable : 4244)
#endif
#if OGRE_UNICODE_SUPPORT
# if OGRE_STRING_USE_CUSTOM_MEMORY_ALLOCATOR
# define DISPLAY_STRING_TO_STRING(DS) (DS.asUTF8_c_str())
# else
# define DISPLAY_STRING_TO_STRING(DS) (DS.asUTF8())
# endif
#else
#define DISPLAY_STRING_TO_STRING(DS) (DS)
#endif
namespace OgreBites
{
enum TrayLocation // enumerator values for widget tray anchoring locations
{
TL_TOPLEFT,
TL_TOP,
TL_TOPRIGHT,
TL_LEFT,
TL_CENTER,
TL_RIGHT,
TL_BOTTOMLEFT,
TL_BOTTOM,
TL_BOTTOMRIGHT,
TL_NONE
};
enum ButtonState // enumerator values for button states
{
BS_UP,
BS_OVER,
BS_DOWN
};
// forward widget class declarations
class Widget;
class Button;
class SelectMenu;
class Label;
class Slider;
class CheckBox;
/*=============================================================================
| Listener class for responding to tray events.
=============================================================================*/
class SdkTrayListener
{
public:
virtual ~SdkTrayListener() {}
virtual void buttonHit(Button* button) {}
virtual void itemSelected(SelectMenu* menu) {}
virtual void labelHit(Label* label) {}
virtual void sliderMoved(Slider* slider) {}
virtual void checkBoxToggled(CheckBox* box) {}
virtual void okDialogClosed(const Ogre::DisplayString& message) {}
virtual void yesNoDialogClosed(const Ogre::DisplayString& question, bool yesHit) {}
};
/*=============================================================================
| Abstract base class for all widgets.
=============================================================================*/
class Widget
{
public:
Widget()
{
mTrayLoc = TL_NONE;
mElement = 0;
mListener = 0;
}
virtual ~Widget() {}
void cleanup()
{
if (mElement) nukeOverlayElement(mElement);
mElement = 0;
}
/*-----------------------------------------------------------------------------
| Static utility method to recursively delete an overlay element plus
| all of its children from the system.
-----------------------------------------------------------------------------*/
static void nukeOverlayElement(Ogre::OverlayElement* element)
{
Ogre::OverlayContainer* container = dynamic_cast<Ogre::OverlayContainer*>(element);
if (container)
{
std::vector<Ogre::OverlayElement*> toDelete;
Ogre::OverlayContainer::ChildIterator children = container->getChildIterator();
while (children.hasMoreElements())
{
toDelete.push_back(children.getNext());
}
for (unsigned int i = 0; i < toDelete.size(); i++)
{
nukeOverlayElement(toDelete[i]);
}
}
if (element)
{
Ogre::OverlayContainer* parent = element->getParent();
if (parent) parent->removeChild(element->getName());
Ogre::OverlayManager::getSingleton().destroyOverlayElement(element);
}
}
/*-----------------------------------------------------------------------------
| Static utility method to check if the cursor is over an overlay element.
-----------------------------------------------------------------------------*/
static bool isCursorOver(Ogre::OverlayElement* element, const Ogre::Vector2& cursorPos, Ogre::Real voidBorder = 0)
{
Ogre::OverlayManager& om = Ogre::OverlayManager::getSingleton();
Ogre::Real l = element->_getDerivedLeft() * om.getViewportWidth();
Ogre::Real t = element->_getDerivedTop() * om.getViewportHeight();
Ogre::Real r = l + element->getWidth();
Ogre::Real b = t + element->getHeight();
return (cursorPos.x >= l + voidBorder && cursorPos.x <= r - voidBorder &&
cursorPos.y >= t + voidBorder && cursorPos.y <= b - voidBorder);
}
/*-----------------------------------------------------------------------------
| Static utility method used to get the cursor's offset from the center
| of an overlay element in pixels.
-----------------------------------------------------------------------------*/
static Ogre::Vector2 cursorOffset(Ogre::OverlayElement* element, const Ogre::Vector2& cursorPos)
{
Ogre::OverlayManager& om = Ogre::OverlayManager::getSingleton();
return Ogre::Vector2(cursorPos.x - (element->_getDerivedLeft() * om.getViewportWidth() + element->getWidth() / 2),
cursorPos.y - (element->_getDerivedTop() * om.getViewportHeight() + element->getHeight() / 2));
}
/*-----------------------------------------------------------------------------
| Static utility method used to get the width of a caption in a text area.
-----------------------------------------------------------------------------*/
static Ogre::Real getCaptionWidth(const Ogre::DisplayString& caption, Ogre::TextAreaOverlayElement* area)
{
Ogre::Font* font = (Ogre::Font*)Ogre::FontManager::getSingleton().getByName(area->getFontName()).getPointer();
Ogre::String current = DISPLAY_STRING_TO_STRING(caption);
Ogre::Real lineWidth = 0;
for (unsigned int i = 0; i < current.length(); i++)
{
// be sure to provide a line width in the text area
if (current[i] == ' ')
{
if (area->getSpaceWidth() != 0) lineWidth += area->getSpaceWidth();
else lineWidth += font->getGlyphAspectRatio(' ') * area->getCharHeight();
}
else if (current[i] == '\n') break;
// use glyph information to calculate line width
else lineWidth += font->getGlyphAspectRatio(current[i]) * area->getCharHeight();
}
return (unsigned int)lineWidth;
}
/*-----------------------------------------------------------------------------
| Static utility method to cut off a string to fit in a text area.
-----------------------------------------------------------------------------*/
static void fitCaptionToArea(const Ogre::DisplayString& caption, Ogre::TextAreaOverlayElement* area, Ogre::Real maxWidth)
{
Ogre::Font* f = (Ogre::Font*)Ogre::FontManager::getSingleton().getByName(area->getFontName()).getPointer();
Ogre::String s = DISPLAY_STRING_TO_STRING(caption);
size_t nl = s.find('\n');
if (nl != Ogre::String::npos) s = s.substr(0, nl);
Ogre::Real width = 0;
for (unsigned int i = 0; i < s.length(); i++)
{
if (s[i] == ' ' && area->getSpaceWidth() != 0) width += area->getSpaceWidth();
else width += f->getGlyphAspectRatio(s[i]) * area->getCharHeight();
if (width > maxWidth)
{
s = s.substr(0, i);
break;
}
}
area->setCaption(s);
}
Ogre::OverlayElement* getOverlayElement()
{
return mElement;
}
const Ogre::String& getName()
{
return mElement->getName();
}
TrayLocation getTrayLocation()
{
return mTrayLoc;
}
void hide()
{
mElement->hide();
}
void show()
{
mElement->show();
}
bool isVisible()
{
return mElement->isVisible();
}
// callbacks
virtual void _cursorPressed(const Ogre::Vector2& cursorPos) {}
virtual void _cursorReleased(const Ogre::Vector2& cursorPos) {}
virtual void _cursorMoved(const Ogre::Vector2& cursorPos) {}
virtual void _focusLost() {}
// internal methods used by SdkTrayManager. do not call directly.
void _assignToTray(TrayLocation trayLoc) { mTrayLoc = trayLoc; }
void _assignListener(SdkTrayListener* listener) { mListener = listener; }
protected:
Ogre::OverlayElement* mElement;
TrayLocation mTrayLoc;
SdkTrayListener* mListener;
};
typedef std::vector<Widget*> WidgetList;
typedef Ogre::VectorIterator<WidgetList> WidgetIterator;
/*=============================================================================
| Basic button class.
=============================================================================*/
class Button : public Widget
{
public:
// Do not instantiate any widgets directly. Use SdkTrayManager.
Button(const Ogre::String& name, const Ogre::DisplayString& caption, Ogre::Real width)
{
mElement = Ogre::OverlayManager::getSingleton().createOverlayElementFromTemplate("SdkTrays/Button", "BorderPanel", name);
mBP = (Ogre::BorderPanelOverlayElement*)mElement;
mTextArea = (Ogre::TextAreaOverlayElement*)mBP->getChild(mBP->getName() + "/ButtonCaption");
#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE_IOS
mTextArea->setCharHeight(mTextArea->getCharHeight() - 3);
#endif
mTextArea->setTop(-(mTextArea->getCharHeight() / 2));
if (width > 0)
{
mElement->setWidth(width);
mFitToContents = false;
}
else mFitToContents = true;
setCaption(caption);
mState = BS_UP;
}
virtual ~Button() {}
const Ogre::DisplayString& getCaption()
{
return mTextArea->getCaption();
}
void setCaption(const Ogre::DisplayString& caption)
{
mTextArea->setCaption(caption);
if (mFitToContents) mElement->setWidth(getCaptionWidth(caption, mTextArea) + mElement->getHeight() - 12);
}
const ButtonState& getState() { return mState; }
void _cursorPressed(const Ogre::Vector2& cursorPos)
{
if (isCursorOver(mElement, cursorPos, 4)) setState(BS_DOWN);
}
void _cursorReleased(const Ogre::Vector2& cursorPos)
{
if (mState == BS_DOWN)
{
setState(BS_OVER);
if (mListener) mListener->buttonHit(this);
}
}
void _cursorMoved(const Ogre::Vector2& cursorPos)
{
if (isCursorOver(mElement, cursorPos, 4))
{
if (mState == BS_UP) setState(BS_OVER);
}
else
{
if (mState != BS_UP) setState(BS_UP);
}
}
void _focusLost()
{
setState(BS_UP); // reset button if cursor was lost
}
protected:
void setState(const ButtonState& bs)
{
if (bs == BS_OVER)
{
mBP->setBorderMaterialName("SdkTrays/Button/Over");
mBP->setMaterialName("SdkTrays/Button/Over");
}
else if (bs == BS_UP)
{
mBP->setBorderMaterialName("SdkTrays/Button/Up");
mBP->setMaterialName("SdkTrays/Button/Up");
}
else
{
mBP->setBorderMaterialName("SdkTrays/Button/Down");
mBP->setMaterialName("SdkTrays/Button/Down");
}
mState = bs;
}
ButtonState mState;
Ogre::BorderPanelOverlayElement* mBP;
Ogre::TextAreaOverlayElement* mTextArea;
bool mFitToContents;
};
/*=============================================================================
| Scrollable text box widget.
=============================================================================*/
class TextBox : public Widget
{
public:
// Do not instantiate any widgets directly. Use SdkTrayManager.
TextBox(const Ogre::String& name, const Ogre::DisplayString& caption, Ogre::Real width, Ogre::Real height)
{
mElement = Ogre::OverlayManager::getSingleton().createOverlayElementFromTemplate("SdkTrays/TextBox", "BorderPanel", name);
mElement->setWidth(width);
mElement->setHeight(height);
Ogre::OverlayContainer* container = (Ogre::OverlayContainer*)mElement;
mTextArea = (Ogre::TextAreaOverlayElement*)container->getChild(getName() + "/TextBoxText");
mCaptionBar = (Ogre::BorderPanelOverlayElement*)container->getChild(getName() + "/TextBoxCaptionBar");
mCaptionBar->setWidth(width - 4);
mCaptionTextArea = (Ogre::TextAreaOverlayElement*)mCaptionBar->getChild(mCaptionBar->getName() + "/TextBoxCaption");
setCaption(caption);
mScrollTrack = (Ogre::BorderPanelOverlayElement*)container->getChild(getName() + "/TextBoxScrollTrack");
mScrollHandle = (Ogre::PanelOverlayElement*)mScrollTrack->getChild(mScrollTrack->getName() + "/TextBoxScrollHandle");
mScrollHandle->hide();
mDragging = false;
mScrollPercentage = 0;
mStartingLine = 0;
mPadding = 15;
mText = "";
#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE_IOS
mTextArea->setCharHeight(mTextArea->getCharHeight() - 3);
mCaptionTextArea->setCharHeight(mCaptionTextArea->getCharHeight() - 3);
#endif
refitContents();
}
void setPadding(Ogre::Real padding)
{
mPadding = padding;
refitContents();
}
Ogre::Real getPadding()
{
return mPadding;
}
const Ogre::DisplayString& getCaption()
{
return mCaptionTextArea->getCaption();
}
void setCaption(const Ogre::DisplayString& caption)
{
mCaptionTextArea->setCaption(caption);
}
const Ogre::DisplayString& getText()
{
return mText;
}
/*-----------------------------------------------------------------------------
| Sets text box content. Most of this method is for wordwrap.
-----------------------------------------------------------------------------*/
void setText(const Ogre::DisplayString& text)
{
mText = text;
mLines.clear();
Ogre::Font* font = (Ogre::Font*)Ogre::FontManager::getSingleton().getByName(mTextArea->getFontName()).getPointer();
Ogre::String current = DISPLAY_STRING_TO_STRING(text);
bool firstWord = true;
unsigned int lastSpace = 0;
unsigned int lineBegin = 0;
Ogre::Real lineWidth = 0;
Ogre::Real rightBoundary = mElement->getWidth() - 2 * mPadding + mScrollTrack->getLeft() + 10;
for (unsigned int i = 0; i < current.length(); i++)
{
if (current[i] == ' ')
{
if (mTextArea->getSpaceWidth() != 0) lineWidth += mTextArea->getSpaceWidth();
else lineWidth += font->getGlyphAspectRatio(' ') * mTextArea->getCharHeight();
firstWord = false;
lastSpace = i;
}
else if (current[i] == '\n')
{
firstWord = true;
lineWidth = 0;
mLines.push_back(current.substr(lineBegin, i - lineBegin));
lineBegin = i + 1;
}
else
{
// use glyph information to calculate line width
lineWidth += font->getGlyphAspectRatio(current[i]) * mTextArea->getCharHeight();
if (lineWidth > rightBoundary)
{
if (firstWord)
{
current.insert(i, "\n");
i = i - 1;
}
else
{
current[lastSpace] = '\n';
i = lastSpace - 1;
}
}
}
}
mLines.push_back(current.substr(lineBegin));
unsigned int maxLines = getHeightInLines();
if (mLines.size() > maxLines) // if too much text, filter based on scroll percentage
{
mScrollHandle->show();
filterLines();
}
else // otherwise just show all the text
{
mTextArea->setCaption(current);
mScrollHandle->hide();
mScrollPercentage = 0;
mScrollHandle->setTop(0);
}
}
/*-----------------------------------------------------------------------------
| Sets text box content horizontal alignment.
-----------------------------------------------------------------------------*/
void setTextAlignment(Ogre::TextAreaOverlayElement::Alignment ta)
{
if (ta == Ogre::TextAreaOverlayElement::Left) mTextArea->setHorizontalAlignment(Ogre::GHA_LEFT);
else if (ta == Ogre::TextAreaOverlayElement::Center) mTextArea->setHorizontalAlignment(Ogre::GHA_CENTER);
else mTextArea->setHorizontalAlignment(Ogre::GHA_RIGHT);
refitContents();
}
void clearText()
{
setText("");
}
void appendText(const Ogre::DisplayString& text)
{
setText(getText() + text);
}
/*-----------------------------------------------------------------------------
| Makes adjustments based on new padding, size, or alignment info.
-----------------------------------------------------------------------------*/
void refitContents()
{
mScrollTrack->setHeight(mElement->getHeight() - mCaptionBar->getHeight() - 20);
mScrollTrack->setTop(mCaptionBar->getHeight() + 10);
mTextArea->setTop(mCaptionBar->getHeight() + mPadding - 5);
if (mTextArea->getHorizontalAlignment() == Ogre::GHA_RIGHT) mTextArea->setLeft(-mPadding + mScrollTrack->getLeft());
else if (mTextArea->getHorizontalAlignment() == Ogre::GHA_LEFT) mTextArea->setLeft(mPadding);
else mTextArea->setLeft(mScrollTrack->getLeft() / 2);
setText(getText());
}
/*-----------------------------------------------------------------------------
| Sets how far scrolled down the text is as a percentage.
-----------------------------------------------------------------------------*/
void setScrollPercentage(Ogre::Real percentage)
{
mScrollPercentage = Ogre::Math::Clamp<Ogre::Real>(percentage, 0, 1);
mScrollHandle->setTop((int)(percentage * (mScrollTrack->getHeight() - mScrollHandle->getHeight())));
filterLines();
}
/*-----------------------------------------------------------------------------
| Gets how far scrolled down the text is as a percentage.
-----------------------------------------------------------------------------*/
Ogre::Real getScrollPercentage()
{
return mScrollPercentage;
}
/*-----------------------------------------------------------------------------
| Gets how many lines of text can fit in this window.
-----------------------------------------------------------------------------*/
unsigned int getHeightInLines()
{
return (unsigned int) ((mElement->getHeight() - 2 * mPadding - mCaptionBar->getHeight() + 5) / mTextArea->getCharHeight());
}
void _cursorPressed(const Ogre::Vector2& cursorPos)
{
if (!mScrollHandle->isVisible()) return; // don't care about clicks if text not scrollable
Ogre::Vector2 co = Widget::cursorOffset(mScrollHandle, cursorPos);
if (co.squaredLength() <= 81)
{
mDragging = true;
mDragOffset = co.y;
}
else if (Widget::isCursorOver(mScrollTrack, cursorPos))
{
Ogre::Real newTop = mScrollHandle->getTop() + co.y;
Ogre::Real lowerBoundary = mScrollTrack->getHeight() - mScrollHandle->getHeight();
mScrollHandle->setTop(Ogre::Math::Clamp<int>((int)newTop, 0, (int)lowerBoundary));
// update text area contents based on new scroll percentage
mScrollPercentage = Ogre::Math::Clamp<Ogre::Real>(newTop / lowerBoundary, 0, 1);
filterLines();
}
}
void _cursorReleased(const Ogre::Vector2& cursorPos)
{
mDragging = false;
}
void _cursorMoved(const Ogre::Vector2& cursorPos)
{
if (mDragging)
{
Ogre::Vector2 co = Widget::cursorOffset(mScrollHandle, cursorPos);
Ogre::Real newTop = mScrollHandle->getTop() + co.y - mDragOffset;
Ogre::Real lowerBoundary = mScrollTrack->getHeight() - mScrollHandle->getHeight();
mScrollHandle->setTop(Ogre::Math::Clamp<int>((int)newTop, 0, (int)lowerBoundary));
// update text area contents based on new scroll percentage
mScrollPercentage = Ogre::Math::Clamp<Ogre::Real>(newTop / lowerBoundary, 0, 1);
filterLines();
}
}
void _focusLost()
{
mDragging = false; // stop dragging if cursor was lost
}
protected:
/*-----------------------------------------------------------------------------
| Decides which lines to show.
-----------------------------------------------------------------------------*/
void filterLines()
{
Ogre::String shown = "";
unsigned int maxLines = getHeightInLines();
unsigned int newStart = (unsigned int) (mScrollPercentage * (mLines.size() - maxLines) + 0.5);
mStartingLine = newStart;
for (unsigned int i = 0; i < maxLines; i++)
{
shown += mLines[mStartingLine + i] + "\n";
}
mTextArea->setCaption(shown); // show just the filtered lines
}
Ogre::TextAreaOverlayElement* mTextArea;
Ogre::BorderPanelOverlayElement* mCaptionBar;
Ogre::TextAreaOverlayElement* mCaptionTextArea;
Ogre::BorderPanelOverlayElement* mScrollTrack;
Ogre::PanelOverlayElement* mScrollHandle;
Ogre::DisplayString mText;
Ogre::StringVector mLines;
Ogre::Real mPadding;
bool mDragging;
Ogre::Real mScrollPercentage;
Ogre::Real mDragOffset;
unsigned int mStartingLine;
};
/*=============================================================================
| Basic selection menu widget.
=============================================================================*/
class SelectMenu : public Widget
{
public:
// Do not instantiate any widgets directly. Use SdkTrayManager.
SelectMenu(const Ogre::String& name, const Ogre::DisplayString& caption, Ogre::Real width,
Ogre::Real boxWidth, unsigned int maxItemsShown)
: mHighlightIndex(0)
, mDisplayIndex(0)
, mDragOffset(0.0f)
{
mSelectionIndex = -1;
mFitToContents = false;
mCursorOver = false;
mExpanded = false;
mDragging = false;
mMaxItemsShown = maxItemsShown;
mItemsShown = 0;
mElement = (Ogre::BorderPanelOverlayElement*)Ogre::OverlayManager::getSingleton().createOverlayElementFromTemplate
("SdkTrays/SelectMenu", "BorderPanel", name);
mTextArea = (Ogre::TextAreaOverlayElement*)((Ogre::OverlayContainer*)mElement)->getChild(name + "/MenuCaption");
mSmallBox = (Ogre::BorderPanelOverlayElement*)((Ogre::OverlayContainer*)mElement)->getChild(name + "/MenuSmallBox");
mSmallBox->setWidth(width - 10);
mSmallTextArea = (Ogre::TextAreaOverlayElement*)mSmallBox->getChild(name + "/MenuSmallBox/MenuSmallText");
mElement->setWidth(width);
#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE_IOS
mTextArea->setCharHeight(mTextArea->getCharHeight() - 3);
mSmallTextArea->setCharHeight(mSmallTextArea->getCharHeight() - 3);
#endif
if (boxWidth > 0) // long style
{
if (width <= 0) mFitToContents = true;
mSmallBox->setWidth(boxWidth);
mSmallBox->setTop(2);
mSmallBox->setLeft(width - boxWidth - 5);
mElement->setHeight(mSmallBox->getHeight() + 4);
mTextArea->setHorizontalAlignment(Ogre::GHA_LEFT);
mTextArea->setAlignment(Ogre::TextAreaOverlayElement::Left);
mTextArea->setLeft(12);
mTextArea->setTop(10);
}
mExpandedBox = (Ogre::BorderPanelOverlayElement*)((Ogre::OverlayContainer*)mElement)->getChild(name + "/MenuExpandedBox");
mExpandedBox->setWidth(mSmallBox->getWidth() + 10);
mExpandedBox->hide();
mScrollTrack = (Ogre::BorderPanelOverlayElement*)mExpandedBox->getChild(mExpandedBox->getName() + "/MenuScrollTrack");
mScrollHandle = (Ogre::PanelOverlayElement*)mScrollTrack->getChild(mScrollTrack->getName() + "/MenuScrollHandle");
setCaption(caption);
}
bool isExpanded()
{
return mExpanded;
}
const Ogre::DisplayString& getCaption()
{
return mTextArea->getCaption();
}
void setCaption(const Ogre::DisplayString& caption)
{
mTextArea->setCaption(caption);
if (mFitToContents)
{
mElement->setWidth(getCaptionWidth(caption, mTextArea) + mSmallBox->getWidth() + 23);
mSmallBox->setLeft(mElement->getWidth() - mSmallBox->getWidth() - 5);
}
}
const Ogre::StringVector& getItems()
{
return mItems;
}
size_t getNumItems()
{
return mItems.size();
}
void setItems(const Ogre::StringVector& items)
{
mItems = items;
mSelectionIndex = -1;
for (unsigned int i = 0; i < mItemElements.size(); i++) // destroy all the item elements
{
nukeOverlayElement(mItemElements[i]);
}
mItemElements.clear();
mItemsShown = std::max<int>(2, std::min<int>(mMaxItemsShown, (int)mItems.size()));
for (unsigned int i = 0; i < mItemsShown; i++) // create all the item elements
{
Ogre::BorderPanelOverlayElement* e =
(Ogre::BorderPanelOverlayElement*)Ogre::OverlayManager::getSingleton().createOverlayElementFromTemplate
("SdkTrays/SelectMenuItem", "BorderPanel",
mExpandedBox->getName() + "/Item" + Ogre::StringConverter::toString(i + 1));
e->setTop(6 + i * (mSmallBox->getHeight() - 8));
e->setWidth(mExpandedBox->getWidth() - 32);
mExpandedBox->addChild(e);
mItemElements.push_back(e);
}
if (!items.empty()) selectItem(0, false);
else mSmallTextArea->setCaption("");
}
void addItem(const Ogre::DisplayString& item)
{
mItems.push_back(item);
setItems(mItems);
}
void removeItem(const Ogre::DisplayString& item)
{
Ogre::StringVector::iterator it;
for (it = mItems.begin(); it != mItems.end(); it++)
{
if (item == *it) break;
}
if (it != mItems.end())
{
mItems.erase(it);
if (mItems.size() < mItemsShown)
{
mItemsShown = (int)mItems.size();
nukeOverlayElement(mItemElements.back());
mItemElements.pop_back();
}
}
else
{
Ogre::String desc = "Menu \"" + getName() + "\" contains no item \"" + item + "\".";
OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND, desc, "SelectMenu::removeItem");
}
}
void removeItem(unsigned int index)
{
Ogre::StringVector::iterator it;
unsigned int i = 0;
for (it = mItems.begin(); it != mItems.end(); it++)
{
if (i == index) break;
i++;
}
if (it != mItems.end())
{
mItems.erase(it);
if (mItems.size() < mItemsShown)
{
mItemsShown = (int)mItems.size();
nukeOverlayElement(mItemElements.back());
mItemElements.pop_back();
}
}
else
{
Ogre::String desc = "Menu \"" + getName() + "\" contains no item at position " +
Ogre::StringConverter::toString(index) + ".";
OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND, desc, "SelectMenu::removeItem");
}
}
void clearItems()
{
mItems.clear();
mSelectionIndex = -1;
mSmallTextArea->setCaption("");
}
void selectItem(unsigned int index, bool notifyListener = true)
{
if (index >= mItems.size())
{
Ogre::String desc = "Menu \"" + getName() + "\" contains no item at position " +
Ogre::StringConverter::toString(index) + ".";
OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND, desc, "SelectMenu::selectItem");
}
mSelectionIndex = index;
fitCaptionToArea(mItems[index], mSmallTextArea, mSmallBox->getWidth() - mSmallTextArea->getLeft() * 2);
if (mListener && notifyListener) mListener->itemSelected(this);
}
void selectItem(const Ogre::DisplayString& item, bool notifyListener = true)
{
for (unsigned int i = 0; i < mItems.size(); i++)
{
if (item == mItems[i])
{
selectItem(i, notifyListener);
return;
}
}
Ogre::String desc = "Menu \"" + getName() + "\" contains no item \"" + item + "\".";
OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND, desc, "SelectMenu::selectItem");
}
Ogre::DisplayString getSelectedItem()
{
if (mSelectionIndex == -1)
{
Ogre::String desc = "Menu \"" + getName() + "\" has no item selected.";
OGRE_EXCEPT(Ogre::Exception::ERR_ITEM_NOT_FOUND, desc, "SelectMenu::getSelectedItem");
return "";
}
else return mItems[mSelectionIndex];
}
int getSelectionIndex()
{
return mSelectionIndex;
}
void _cursorPressed(const Ogre::Vector2& cursorPos)
{
Ogre::OverlayManager& om = Ogre::OverlayManager::getSingleton();
if (mExpanded)
{
if (mScrollHandle->isVisible()) // check for scrolling
{
Ogre::Vector2 co = Widget::cursorOffset(mScrollHandle, cursorPos);
if (co.squaredLength() <= 81)
{
mDragging = true;
mDragOffset = co.y;
return;
}
else if (Widget::isCursorOver(mScrollTrack, cursorPos))
{
Ogre::Real newTop = mScrollHandle->getTop() + co.y;
Ogre::Real lowerBoundary = mScrollTrack->getHeight() - mScrollHandle->getHeight();
mScrollHandle->setTop(Ogre::Math::Clamp<int>((int)newTop, 0, (int)lowerBoundary));
Ogre::Real scrollPercentage = Ogre::Math::Clamp<Ogre::Real>(newTop / lowerBoundary, 0, 1);
setDisplayIndex((unsigned int)(scrollPercentage * (mItems.size() - mItemElements.size()) + 0.5));
return;
}
}
if (!isCursorOver(mExpandedBox, cursorPos, 3)) retract();
else
{
Ogre::Real l = mItemElements.front()->_getDerivedLeft() * om.getViewportWidth() + 5;
Ogre::Real t = mItemElements.front()->_getDerivedTop() * om.getViewportHeight() + 5;
Ogre::Real r = l + mItemElements.back()->getWidth() - 10;
Ogre::Real b = mItemElements.back()->_getDerivedTop() * om.getViewportHeight() +
mItemElements.back()->getHeight() - 5;
if (cursorPos.x >= l && cursorPos.x <= r && cursorPos.y >= t && cursorPos.y <= b)
{
if (mHighlightIndex != mSelectionIndex) selectItem(mHighlightIndex);
retract();
}
}
}
else
{
if (mItems.size() < 2) return; // don't waste time showing a menu if there's no choice
if (isCursorOver(mSmallBox, cursorPos, 4))
{
mExpandedBox->show();
mSmallBox->hide();
// calculate how much vertical space we need
Ogre::Real idealHeight = mItemsShown * (mSmallBox->getHeight() - 8) + 20;
mExpandedBox->setHeight(idealHeight);
mScrollTrack->setHeight(mExpandedBox->getHeight() - 20);
mExpandedBox->setLeft(mSmallBox->getLeft() - 4);
// if the expanded menu goes down off the screen, make it go up instead
if (mSmallBox->_getDerivedTop() * om.getViewportHeight() + idealHeight > om.getViewportHeight())
{
mExpandedBox->setTop(mSmallBox->getTop() + mSmallBox->getHeight() - idealHeight + 3);
// if we're in thick style, hide the caption because it will interfere with the expanded menu
if (mTextArea->getHorizontalAlignment() == Ogre::GHA_CENTER) mTextArea->hide();
}
else mExpandedBox->setTop(mSmallBox->getTop() + 3);
mExpanded = true;
mHighlightIndex = mSelectionIndex;
setDisplayIndex(mHighlightIndex);
if (mItemsShown < mItems.size()) // update scrollbar position
{
mScrollHandle->show();
Ogre::Real lowerBoundary = mScrollTrack->getHeight() - mScrollHandle->getHeight();
mScrollHandle->setTop((int)(mDisplayIndex * lowerBoundary / (mItems.size() - mItemElements.size())));
}
else mScrollHandle->hide();
}
}
}
void _cursorReleased(const Ogre::Vector2& cursorPos)
{
mDragging = false;
}
void _cursorMoved(const Ogre::Vector2& cursorPos)
{
Ogre::OverlayManager& om = Ogre::OverlayManager::getSingleton();
if (mExpanded)
{
if (mDragging)
{
Ogre::Vector2 co = Widget::cursorOffset(mScrollHandle, cursorPos);
Ogre::Real newTop = mScrollHandle->getTop() + co.y - mDragOffset;
Ogre::Real lowerBoundary = mScrollTrack->getHeight() - mScrollHandle->getHeight();
mScrollHandle->setTop(Ogre::Math::Clamp<int>((int)newTop, 0, (int)lowerBoundary));
Ogre::Real scrollPercentage = Ogre::Math::Clamp<Ogre::Real>(newTop / lowerBoundary, 0, 1);
int newIndex = (int) (scrollPercentage * (mItems.size() - mItemElements.size()) + 0.5);
if (newIndex != mDisplayIndex) setDisplayIndex(newIndex);
return;
}