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1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // class CCoeFontProvider |
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15 // |
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16 // |
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17 |
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18 #include <coefontprovider.h> |
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19 #include <coecntss.h> |
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20 |
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21 CCoeFontProvider::TFont::TFont(const TCoeFont& aCoeFont, TInt aZoomFactor, const CFont* aFont) : |
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22 iCoeFont(aCoeFont), iZoomFactor(aZoomFactor), iFont(aFont) |
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23 { |
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24 } |
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25 |
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26 TInt CCoeFontProvider::TFont::Compare(const TFont& aFirst, const TFont& aSecond) |
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27 { |
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28 const TInt comp = TCoeFont::Compare(aFirst.iCoeFont, aSecond.iCoeFont); |
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29 if(comp) |
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30 { |
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31 return comp; |
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32 } |
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33 |
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34 return (aFirst.iZoomFactor - aSecond.iZoomFactor); |
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35 } |
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36 |
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37 /** Standard Symbian factory method. Uses a default typeface |
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38 |
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39 @publishedAll |
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40 @released |
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41 */ |
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42 EXPORT_C CCoeFontProvider* CCoeFontProvider::NewL() |
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43 { |
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44 return NewL(CCoeControlStaticSettings::SystemTypeface()); |
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45 } |
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46 |
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47 /** Standard Symbian factory method. Typeface to use is provided by caller. |
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48 |
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49 @param aTypefaceName Typeface to use. |
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50 @publishedAll |
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51 @released |
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52 */ |
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53 EXPORT_C CCoeFontProvider* CCoeFontProvider::NewL(const TDesC& aTypefaceName) |
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54 { |
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55 CCoeFontProvider* self = new (ELeave) CCoeFontProvider(aTypefaceName); |
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56 CleanupStack::PushL(self); |
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57 self->ConstructL(); |
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58 CleanupStack::Pop(self); |
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59 return self; |
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60 } |
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61 |
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62 /** Constructor |
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63 */ |
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64 CCoeFontProvider::CCoeFontProvider(const TDesC& aTypefaceName) |
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65 { |
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66 iTypeface.iName = aTypefaceName; |
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67 } |
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68 |
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69 /** Symbian second-phase constructor |
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70 */ |
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71 void CCoeFontProvider::ConstructL() |
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72 { |
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73 CCoeControlStaticSettings::GetLogicalToPixelFontSizesL(iLogicalToPixelSizes); |
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74 } |
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75 |
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76 CCoeFontProvider::~CCoeFontProvider() |
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77 { |
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78 ReleaseAllFonts(); |
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79 iLogicalToPixelSizes.Reset(); |
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80 iLogicalToPixelSizes.Close(); |
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81 } |
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82 |
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83 void CCoeFontProvider::ReleaseAllFonts() |
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84 { |
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85 TInt count = iFonts.Count(); |
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86 while(count--) |
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87 { |
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88 CCoeEnv::Static()->ScreenDevice()->ReleaseFont(const_cast<CFont*>(iFonts[count].iFont)); |
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89 } |
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90 iFonts.Reset(); |
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91 } |
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92 |
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93 /** Change the typeface |
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94 |
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95 @param aTypeface The typeface to use |
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96 @publishedAll |
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97 @released |
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98 */ |
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99 EXPORT_C void CCoeFontProvider::SetTypeface(TTypeface aTypeface) |
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100 { |
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101 if(iTypeface.iName.CompareF(aTypeface.iName) == 0) |
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102 { |
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103 iTypeface = aTypeface; |
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104 ReleaseAllFonts(); |
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105 |
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106 CCoeAppUi* appUi = static_cast<CCoeAppUi*>(CCoeEnv::Static()->AppUi()); |
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107 if(appUi) |
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108 { |
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109 appUi->NotifyFontChange(*this); |
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110 } |
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111 } |
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112 } |
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113 |
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114 /** Use the system typeface |
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115 |
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116 @publishedAll |
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117 @released |
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118 */ |
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119 EXPORT_C void CCoeFontProvider::UseSystemTypeface() |
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120 { |
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121 const TDesC& systemTypeFaceName = CCoeControlStaticSettings::SystemTypeface(); |
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122 const TBool oldNameNull = (!iTypeface.iName.Length()); |
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123 if(iTypeface.iName.CompareF(systemTypeFaceName) == 0) |
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124 { |
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125 iTypeface.iName = systemTypeFaceName; |
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126 ReleaseAllFonts(); |
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127 |
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128 if(!oldNameNull) |
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129 { |
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130 CCoeAppUi* appUi = static_cast<CCoeAppUi*>(CCoeEnv::Static()->AppUi()); |
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131 if(appUi) |
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132 { |
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133 appUi->NotifyFontChange(*this); |
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134 } |
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135 } |
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136 } |
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137 } |
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138 |
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139 /** Return the current typeface |
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140 |
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141 @publishedAll |
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142 @released |
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143 */ |
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144 EXPORT_C TTypeface CCoeFontProvider::Typeface() const |
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145 { |
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146 return iTypeface; |
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147 } |
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148 |
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149 /** Returns the closest available match to the specified logical font and zoom factor. |
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150 Note that all CFont objects referenced through this method are owned by the font provider. |
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151 Thus do not explicitly release the font object after use! |
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152 |
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153 A default font provider is made available by the CCoeEnv singleton and returned from |
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154 CCoeControl::FindFontProvider() if no overriding font provider has been attached to |
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155 the control tree. |
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156 |
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157 For an example of how to use this function, see CCoeControl::ScreenFont(). |
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158 |
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159 @see CCoeControl::ScreenFont() |
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160 @see CCoeControl::FindFontProvider() |
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161 @see CCoeControl::AccumulatedZoom() |
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162 |
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163 @param aFont The requested logical font. |
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164 @param aZoomFactor Zoom factor used when deriving the font height. |
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165 @return The closest matching available font. |
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166 @publishedAll |
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167 @released |
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168 */ |
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169 EXPORT_C const CFont& CCoeFontProvider::Font(const TCoeFont& aFont, const TZoomFactor& aZoomFactor) const |
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170 { |
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171 const TInt index = iFonts.FindInOrder(TFont(aFont, aZoomFactor.ZoomFactor()), TLinearOrder<TFont>(TFont::Compare)); |
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172 if(index != KErrNotFound) |
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173 { |
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174 return *iFonts[index].iFont; |
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175 } |
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176 |
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177 const TInt heightInPixels = (aFont.LogicalSize() != TCoeFont::EUndefinedSize) ? iLogicalToPixelSizes[aFont.LogicalSize()] : aFont.HeightInPixels(); |
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178 |
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179 TFontSpec fontSpec; |
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180 fontSpec.iTypeface = iTypeface; |
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181 fontSpec.iHeight = aZoomFactor.GraphicsDeviceMap()->VerticalPixelsToTwips(heightInPixels); // don't care about the zoom just yet |
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182 fontSpec.iFontStyle = aFont.Style(); |
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183 |
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184 CFont* font = NULL; |
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185 TInt err = KErrNone; |
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186 if(aFont.IsNonZooming()) |
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187 { |
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188 err = const_cast<MGraphicsDeviceMap*>(aZoomFactor.GraphicsDeviceMap())->GetNearestFontToMaxHeightInTwips(font, fontSpec,fontSpec.iHeight); |
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189 } |
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190 else |
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191 { |
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192 err = const_cast<TZoomFactor&>(aZoomFactor).GetNearestFontToMaxHeightInTwips(font, fontSpec, fontSpec.iHeight); // here, consider the zoom |
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193 } |
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194 if (err != KErrNone) |
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195 { |
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196 //error has occured so just return normal font. |
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197 const CFont* normalFont = CCoeEnv::Static()->NormalFont(); |
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198 return *normalFont; |
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199 } |
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200 |
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201 err = iFonts.InsertInOrder(TFont(aFont, aZoomFactor.ZoomFactor(), font), TLinearOrder<TFont>(TFont::Compare)); |
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202 if (err != KErrNone) |
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203 { |
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204 //error has occured so just return normal font. |
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205 const CFont* normalFont = CCoeEnv::Static()->NormalFont(); |
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206 return *normalFont; |
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207 } |
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208 |
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209 return *font; |
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210 } |
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211 |
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212 /** flushes the array & refetches the logical-to-pixel mapping. Called when global control settings are updated |
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213 |
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214 @internalTechnology |
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215 */ |
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216 void CCoeFontProvider::RefetchPixelMappingL() |
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217 { |
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218 CCoeControlStaticSettings::GetLogicalToPixelFontSizesL(iLogicalToPixelSizes); |
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219 ReleaseAllFonts(); |
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220 } |
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221 |