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Wednesday the 23rd of May 2012 @ 10:28am

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LibN2L N2L Home Older News Downloads Documentation (n2l5) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Documentation (libN2L-4) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Bugtracker Project Page Report a Bug Bug List Related Things Life 2130 Devel Game Journal

LibN2L-4 Library Code Reference Classes Compounds Files Members Method Index Full Reference cGuiTextStyle.cpp Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2002 Aaron Cameron 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; either version 2.1 of the License, or (at your option) any later version. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA A copy of the GNU Lesser General Public License has been provided with this library in the file 'COPYING'. Contact information for the author of this library has been provided with this library in the file 'AUTHOR'. ************************************************************************/ #include "gui/cGuiTextStyle.h" #include "n2l/dynVars.h" #include "n2l/resourceManagement.h" #include "gui/cGuiElement.h" /******************************************************************************/ namespace n2l { /**************************************************************************/ cGuiTextStyle::cGuiTextStyle() : mColourInherit(true), mColour(1.0f,1.0f,1.0f,1.0f), mFontHeight(0.0f), mFont(0), mAlign( Align_Left ), mVAlign( VAlign_Top ), mClipping( Clipping_Letter ) { } /**************************************************************************/ cGuiTextStyle::cGuiTextStyle( const cVfsNodeInterface & iNode ) : mColourInherit(true), mColour(1.0f,1.0f,1.0f,1.0f), mFontHeight(0.0f), mFont(0), mAlign( Align_Left ), mVAlign( VAlign_Top ), mClipping( Clipping_Letter ) { load( iNode ); } /**************************************************************************/ cGuiTextStyle::cGuiTextStyle( const cDynVar &iDef ) : mColourInherit(true), mColour(1.0f,1.0f,1.0f,1.0f), mFontHeight(0.0f), mFont(0), mAlign( Align_Left ), mVAlign( VAlign_Top ), mClipping( Clipping_Letter ) { load( iDef ); } /**************************************************************************/ cGuiTextStyle::~cGuiTextStyle() { } /**************************************************************************/ void cGuiTextStyle::load( const cVfsNodeInterface & iNode ) { cDynVar def; cGuiElement::validateAndDecode( def, iNode, "n2l::cGuiTextStyle" ); load( def ); } /**************************************************************************/ void cGuiTextStyle::load( const cDynVar &iDef ) { if (iDef.keyExists("font")) font( cResourceManager::get<cTextureFont>(iDef["font"]) ); if (iDef.keyExists("fontHeight")) fontHeight( iDef["fontHeight"] ); if (iDef.keyExists("colour")) colour( iDef["colour"] ); if (iDef.keyExists("colourInherit")) colourInherit( iDef["colourInherit"] ); if (iDef.keyExists("align")) align( tAlign(tSint(iDef["align"])) ); if (iDef.keyExists("vAlign")) vAlign( tVAlign(tSint(iDef["vAlign"])) ); if (iDef.keyExists("clipping")) clipping( tClipping(tSint(iDef["clipping"])) ); } /**************************************************************************/ void cGuiTextStyle::font( const cAutoPtr<const cFontInterface> & i_iFont ) { mFont = i_iFont; } /**************************************************************************/ const cAutoPtr<const cFontInterface> & cGuiTextStyle::font() const { return mFont; } /**************************************************************************/ void cGuiTextStyle::fontHeight( const tFloat & iFontHeight ) { mFontHeight = iFontHeight; } /**************************************************************************/ const tFloat & cGuiTextStyle::fontHeight() const { return mFontHeight; } /**************************************************************************/ void cGuiTextStyle::colour( const tGuiColour & iColour ) { mColourInherit = false; mColour = iColour; } /**************************************************************************/ void cGuiTextStyle::colourInherit( const tBool iValue ) { mColourInherit = iValue; } /**************************************************************************/ void cGuiTextStyle::align( const tAlign iAlign ) { alignInBounds( iAlign ); mAlign = iAlign; } /**************************************************************************/ void cGuiTextStyle::vAlign( const tVAlign iVAlign ) { vAlignInBounds( iVAlign ); mVAlign = iVAlign; } /**************************************************************************/ void cGuiTextStyle::clipping( const tClipping iClipping ) { clippingInBounds( iClipping ); mClipping = iClipping; } /**************************************************************************/ const tString::size_type cGuiTextStyle::draw( const tGuiPos &iPos, const tGuiPos &iSize, const tString &iText, const tString::size_type iSPos, const tString::size_type iMaxSize ) const { if (!mFont.isSet()) return 0; if (iText.empty()) return 0; tGuiPos finalPos; tFloat glyphHeight; tString::size_type sPos,ePos, charactersDrawn; commonDraw( iPos, iSize, iText, iSPos, iMaxSize, charactersDrawn, finalPos, glyphHeight, sPos,ePos ); if (!mColourInherit) mColour.glColour4(); glPushAttrib( GL_ALL_ATTRIB_BITS ); glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); glEnable( GL_BLEND ); // glDisable( GL_DEPTH_TEST ); glEnable( GL_TEXTURE_2D ); glCullFace( GL_BACK ); glEnable( GL_CULL_FACE ); mFont->draw( finalPos, iText, glyphHeight, iSPos, ePos-sPos ); glPopAttrib(); return ePos-sPos; } /**************************************************************************/ const tString::size_type cGuiTextStyle::wouldDraw( const tGuiPos & iSize, const tString & iText, const tString::size_type iSPos, const tString::size_type iMaxSize ) const { if (!mFont.isSet()) return 0; tGuiPos finalPos; tFloat glyphHeight; tString::size_type sPos,ePos, charactersDrawn; const tGuiPos AnyPos(0,0); commonDraw( AnyPos, iSize, iText, iSPos, iMaxSize, charactersDrawn, finalPos, glyphHeight, sPos,ePos ); return ePos-sPos; } /**************************************************************************/ const tFloat cGuiTextStyle::calcGlyphHeight( const tGuiPos &iSize ) const { return (mFontHeight>0?mFontHeight:iSize.y()); } /**************************************************************************/ void cGuiTextStyle::prop( const tString &iName, const cDynVar &iVal ) { if (iName == "colour") colour( iVal ); else if (iName == "colourInherit") colourInherit( iVal ); else if (iName == "fontHeight") fontHeight( iVal ); } /**************************************************************************/ const cDynVar cGuiTextStyle::prop( const tString &iName ) const { cDynVar oVal = cDynVar::Null; if (iName == "colour") { oVal = cDynVar::Array; oVal.insert(mColour.r()); oVal.insert(mColour.g()); oVal.insert(mColour.b()); oVal.insert(mColour.a()); } return oVal; } /**************************************************************************/ void cGuiTextStyle::commonDraw( const tGuiPos &iPos, const tGuiPos &iSize, const tString &iText, const tString::size_type iSPos, const tString::size_type iMaxSize, tString::size_type &oCharactersDrawn, tGuiPos &oFinalPos, tFloat &oGlyphHeight, tString::size_type &oSPos, tString::size_type &oCEndPos ) const { tString::size_type strLength( iText.size() ); if (iMaxSize>0) strLength = n2l_min( strLength, iSPos+iMaxSize ); const tFloat GlyphHeight = (mFontHeight>0?mFontHeight:iSize.y()); const tFloat GlyphSeperation = mFont->glyphSeperation(GlyphHeight); if (!mFont || !strLength || iSPos>=strLength) { oSPos = iSPos; oGlyphHeight = GlyphHeight; oCEndPos = iSPos; return; } // Calculate how many characters we're going to draw. tString::size_type cEndPos(iSPos); tFloat strWidth( 0.0f ); tFloat whiteSpaceStrWidth( 0.0f ); if (mClipping != Clipping_NoClip) { tString::size_type cLastWhitespace(iSPos); tBool clip = false; while (!clip && cEndPos<strLength) { const tFloat ExtraSpace(cEndPos==iSPos?0:GlyphSeperation); const tFloat GlyphWidth( ExtraSpace + mFont->glyphWidth(iText[cEndPos],GlyphHeight) ); if (strWidth+GlyphWidth>iSize.x()) { clip = true; continue; } strWidth += GlyphWidth; if (iText[cEndPos]==' ' || iText[cEndPos]=='\t' || iText[cEndPos]=='\n') { cLastWhitespace = cEndPos; whiteSpaceStrWidth = strWidth; } // Up the position. ++cEndPos; } if (cEndPos!=strLength) { // What to do with the values we have here. switch (mClipping) { case Clipping_Letter: // We'll use the last character to fit as a clip point // so we have nothing more to do break; case Clipping_Word: if (cLastWhitespace==iSPos) { oSPos = iSPos; oCEndPos = iSPos; oGlyphHeight = GlyphHeight; return; } else { cEndPos = cLastWhitespace; strWidth = whiteSpaceStrWidth; } break; case Clipping_HardWord: if (cLastWhitespace!=iSPos) { cEndPos = cLastWhitespace; strWidth = whiteSpaceStrWidth; } // Else we leave it at the last character // splitting pos. break; default: // We shouldn't be able to get here. //Added for completeness cEndPos = strLength; break; } // switch } } else { // if (mClipping != Clipping_NoClip) cEndPos = strLength; strWidth = mFont->calcSize( iText, GlyphHeight, iSPos, cEndPos-iSPos ).x(); } // Get the final rendering positions tGuiPos finalPos(iPos); switch (mAlign) { case Align_Right: finalPos.x( (iPos.x() + iSize.x()) - strWidth ); break; case Align_Center: finalPos.x( (iPos.x() + iSize.x()/2.0f) - strWidth/2.0f ); break; default: break; } // switch switch (mVAlign) { case VAlign_Middle: finalPos.y( (iPos.y() + iSize.y()/2.0f) - GlyphHeight/2.0f ); break; case VAlign_Bottom: finalPos.y( (iPos.y() + iSize.y()) - GlyphHeight ); break; default: break; } // switch // Set the outgoing values. oFinalPos = finalPos; oGlyphHeight = GlyphHeight; oSPos = iSPos; oCEndPos = cEndPos; } /**************************************************************************/ void cGuiTextStyle::alignInBounds( const tAlign iAlign ) const { if (iAlign<0 || iAlign>=Align_NumAligns) throw cOutOfBoundsException( "cGuiTextStyle::alignInBounds", "Alignment value illegal" ); } /**************************************************************************/ void cGuiTextStyle::vAlignInBounds( const tVAlign iVAlign ) const { if (iVAlign<0 || iVAlign>=VAlign_NumVAligns) throw cOutOfBoundsException( "cGuiTextStyle::vAlignInBounds", "Vertical Alignment value illegal" ); } /**************************************************************************/ void cGuiTextStyle::clippingInBounds( const tClipping iClipping ) const { if (iClipping<0 || iClipping>=Clipping_NumClippings) throw cOutOfBoundsException( "cGuiTextStyle::clippingInBounds", "Clipping value illegal" ); } } // namespace n2l

©2012 Aaron Cameron