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/**
* @file llhudtext.h
* @brief LLHUDText class definition
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLHUDTEXT_H
#define LL_LLHUDTEXT_H
#include "llpointer.h"
#include "llhudobject.h"
#include "v4color.h"
#include "v4coloru.h"
#include "v2math.h"
#include "llrect.h"
#include "llfontgl.h"
#include "llfontvertexbuffer.h"
#include <set>
#include <vector>
// Renders a 2D text billboard floating at the location specified.
class LLDrawable;
class LLHUDText;
struct lltextobject_further_away
{
bool operator()(const LLPointer<LLHUDText>& lhs, const LLPointer<LLHUDText>& rhs) const;
};
class LLHUDText : public LLHUDObject
{
protected:
class LLHUDTextSegment
{
public:
LLHUDTextSegment(const LLWString& text, const LLFontGL::StyleFlags style, const LLColor4& color, const LLFontGL* font)
: mColor(color),
mStyle(style),
mText(text),
mFont(font)
{}
F32 getWidth(const LLFontGL* font);
const LLWString& getText() const { return mText; }
void clearFontWidthMap() { mFontWidthMap.clear(); }
LLColor4 mColor;
LLFontGL::StyleFlags mStyle;
const LLFontGL* mFont;
LLFontVertexBuffer mFontBuffer;
LLFontVertexBuffer mFontBufferText;
private:
LLWString mText;
std::map<const LLFontGL*, F32> mFontWidthMap;
};
public:
typedef enum e_text_alignment
{
ALIGN_TEXT_LEFT,
ALIGN_TEXT_CENTER
} ETextAlignment;
typedef enum e_vert_alignment
{
ALIGN_VERT_TOP,
ALIGN_VERT_CENTER
} EVertAlignment;
public:
// Set entire string, eliminating existing lines
void setString(const std::string& text_utf8);
void clearString();
// Add text a line at a time, allowing custom formatting
void addLine(const std::string &text_utf8, const LLColor4& color, const LLFontGL::StyleFlags style = LLFontGL::NORMAL, const LLFontGL* font = NULL);
// Sets the default font for lines with no font specified
void setFont(const LLFontGL* font);
void setColor(const LLColor4 &color);
void setAlpha(F32 alpha);
void setZCompare(const bool zcompare);
void setDoFade(const bool do_fade);
// void setVisibleOffScreen(bool visible) { mVisibleOffScreen = visible; }
// mMaxLines of -1 means unlimited lines.
void setMaxLines(S32 max_lines) { mMaxLines = max_lines; }
void setFadeDistance(F32 fade_distance, F32 fade_range) { mFadeDistance = fade_distance; mFadeRange = fade_range; }
void updateVisibility();
LLVector2 updateScreenPos(LLVector2 &offset_target);
void updateSize();
void setMass(F32 mass) { mMass = llmax(0.1f, mass); }
void setTextAlignment(ETextAlignment alignment) { mTextAlignment = alignment; }
void setVertAlignment(EVertAlignment alignment) { mVertAlignment = alignment; }
/*virtual*/ void markDead();
friend class LLHUDObject;
/*virtual*/ F32 getDistance() const { return mLastDistance; }
bool getVisible() { return mVisible; }
bool getHidden() const { return mHidden; }
void setHidden( bool hide ) { mHidden = hide; }
void setOnHUDAttachment(bool on_hud) { mOnHUDAttachment = on_hud; }
void shift(const LLVector3& offset);
static void shiftAll(const LLVector3& offset);
static void renderAllHUD();
static void reshape();
static void setDisplayText(bool flag) { sDisplayText = flag ; }
protected:
LLHUDText(const U8 type);
/*virtual*/ void render();
void renderText();
static void updateAll();
S32 getMaxLines();
private:
~LLHUDText();
bool mOnHUDAttachment;
bool mDoFade;
F32 mFadeRange;
F32 mFadeDistance;
F32 mLastDistance;
bool mZCompare;
// bool mVisibleOffScreen;
bool mOffscreen;
LLColor4 mColor;
LLVector3 mScale;
F32 mWidth;
F32 mHeight;
LLColor4U mPickColor;
const LLFontGL* mFontp;
const LLFontGL* mBoldFontp;
LLRectf mSoftScreenRect;
LLVector3 mPositionAgent;
LLVector3 mLastRenderPosition;
LLVector2 mPositionOffset;
LLVector2 mTargetPositionOffset;
F32 mMass;
S32 mMaxLines;
S32 mOffsetY;
F32 mRadius;
std::vector<LLHUDTextSegment> mTextSegments;
ETextAlignment mTextAlignment;
EVertAlignment mVertAlignment;
bool mHidden;
static bool sDisplayText ;
static std::set<LLPointer<LLHUDText> > sTextObjects;
static std::vector<LLPointer<LLHUDText> > sVisibleTextObjects;
static std::vector<LLPointer<LLHUDText> > sVisibleHUDTextObjects;
typedef std::set<LLPointer<LLHUDText> >::iterator TextObjectIterator;
typedef std::vector<LLPointer<LLHUDText> >::iterator VisibleTextObjectIterator;
};
#endif // LL_LLHUDTEXT_H
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