1 | /**************************************************************************** |
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2 | ** |
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3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 | ** |
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5 | ** Use, modification and distribution is allowed without limitation, |
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6 | ** warranty, liability or support of any kind. |
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7 | ** |
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8 | ****************************************************************************/ |
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9 | |
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10 | #include "qtwin.h" |
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11 | #include <QLibrary> |
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12 | #include <QApplication> |
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13 | #include <QWidget> |
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14 | #include <QList> |
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15 | #include <QPointer> |
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16 | |
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17 | //! \todo TODO: Detect X11 in Qt 5 more reliably |
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18 | // No Q_WS_X11 in Qt 5. Check if we're using X11 and define it. |
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19 | #if (QT_VERSION >= QT_VERSION_CHECK(5,0,0)) && defined(Q_OS_UNIX) && !defined(Q_WS_X11) |
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20 | # if !defined(Q_OS_MAC) && !defined(Q_OS_SYMBIAN) && !defined(Q_WS_QPA) |
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21 | # define Q_WS_X11 |
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22 | # endif |
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23 | #endif |
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24 | |
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25 | #ifdef Q_WS_X11 |
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26 | #include <X11/Xlib.h> |
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27 | #endif // Q_WS_X11 |
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28 | |
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29 | #ifdef Q_OS_WIN32 |
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30 | |
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31 | #include <qt_windows.h> |
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32 | |
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33 | // Blur behind data structures |
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34 | #define DWM_BB_ENABLE 0x00000001 // fEnable has been specified |
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35 | #define DWM_BB_BLURREGION 0x00000002 // hRgnBlur has been specified |
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36 | #define DWM_BB_TRANSITIONONMAXIMIZED 0x00000004 // fTransitionOnMaximized has been specified |
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37 | #define WM_DWMCOMPOSITIONCHANGED 0x031E // Composition changed window message |
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38 | |
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39 | typedef struct _DWM_BLURBEHIND |
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40 | { |
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41 | DWORD dwFlags; |
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42 | BOOL fEnable; |
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43 | HRGN hRgnBlur; |
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44 | BOOL fTransitionOnMaximized; |
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45 | } DWM_BLURBEHIND, *PDWM_BLURBEHIND; |
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46 | |
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47 | typedef struct _MARGINS |
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48 | { |
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49 | int cxLeftWidth; |
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50 | int cxRightWidth; |
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51 | int cyTopHeight; |
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52 | int cyBottomHeight; |
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53 | } MARGINS, *PMARGINS; |
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54 | |
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55 | typedef HRESULT (WINAPI *PtrDwmIsCompositionEnabled)(BOOL* pfEnabled); |
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56 | typedef HRESULT (WINAPI *PtrDwmExtendFrameIntoClientArea)(HWND hWnd, const MARGINS* pMarInset); |
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57 | typedef HRESULT (WINAPI *PtrDwmEnableBlurBehindWindow)(HWND hWnd, const DWM_BLURBEHIND* pBlurBehind); |
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58 | typedef HRESULT (WINAPI *PtrDwmGetColorizationColor)(DWORD *pcrColorization, BOOL *pfOpaqueBlend); |
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59 | |
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60 | static PtrDwmIsCompositionEnabled pDwmIsCompositionEnabled= 0; |
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61 | static PtrDwmEnableBlurBehindWindow pDwmEnableBlurBehindWindow = 0; |
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62 | static PtrDwmExtendFrameIntoClientArea pDwmExtendFrameIntoClientArea = 0; |
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63 | static PtrDwmGetColorizationColor pDwmGetColorizationColor = 0; |
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64 | |
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65 | |
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66 | /* |
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67 | * Internal helper class that notifies windows if the |
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68 | * DWM compositing state changes and updates the widget |
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69 | * flags correspondingly. |
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70 | */ |
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71 | class WindowNotifier : public QWidget |
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72 | { |
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73 | public: |
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74 | WindowNotifier() { winId(); } |
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75 | void addWidget(QWidget *widget) { widgets.append(widget); } |
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76 | void removeWidget(QWidget *widget) { widgets.removeAll(widget); } |
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77 | bool winEvent(MSG *message, long *result); |
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78 | |
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79 | private: |
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80 | QWidgetList widgets; |
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81 | }; |
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82 | |
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83 | static bool resolveLibs() |
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84 | { |
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85 | if (!pDwmIsCompositionEnabled) { |
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86 | QLibrary dwmLib(QString::fromAscii("dwmapi")); |
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87 | pDwmIsCompositionEnabled =(PtrDwmIsCompositionEnabled)dwmLib.resolve("DwmIsCompositionEnabled"); |
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88 | pDwmExtendFrameIntoClientArea = (PtrDwmExtendFrameIntoClientArea)dwmLib.resolve("DwmExtendFrameIntoClientArea"); |
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89 | pDwmEnableBlurBehindWindow = (PtrDwmEnableBlurBehindWindow)dwmLib.resolve("DwmEnableBlurBehindWindow"); |
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90 | pDwmGetColorizationColor = (PtrDwmGetColorizationColor)dwmLib.resolve("DwmGetColorizationColor"); |
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91 | } |
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92 | return pDwmIsCompositionEnabled != 0; |
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93 | } |
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94 | |
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95 | #endif |
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96 | |
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97 | /*! |
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98 | * Chekcs and returns true if Windows DWM composition |
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99 | * is currently enabled on the system. |
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100 | * |
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101 | * To get live notification on the availability of |
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102 | * this feature, you will currently have to |
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103 | * reimplement winEvent() on your widget and listen |
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104 | * for the WM_DWMCOMPOSITIONCHANGED event to occur. |
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105 | * |
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106 | */ |
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107 | bool QtWin::isCompositionEnabled() |
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108 | { |
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109 | #ifdef Q_OS_WIN32 |
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110 | if (resolveLibs()) { |
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111 | HRESULT hr = S_OK; |
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112 | BOOL isEnabled = false; |
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113 | hr = pDwmIsCompositionEnabled(&isEnabled); |
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114 | if (SUCCEEDED(hr)) |
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115 | return isEnabled; |
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116 | } |
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117 | return false; |
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118 | #elif defined(Q_WS_X11) |
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119 | Display *d = XOpenDisplay(NULL); |
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120 | Atom _NET_WM_CM_S0 = XInternAtom(d, "_NET_WM_CM_S0", true); |
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121 | bool result = (_NET_WM_CM_S0 != None); |
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122 | if (result) |
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123 | result = (XGetSelectionOwner(d, _NET_WM_CM_S0) != None); |
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124 | XCloseDisplay(d); |
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125 | return result; |
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126 | #else |
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127 | //! \todo TODO: Check for trsnsparency support in other OSes. |
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128 | return false; |
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129 | #endif |
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130 | } |
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131 | |
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132 | /*! |
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133 | * Enables Blur behind on a Widget. |
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134 | * |
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135 | * \a enable tells if the blur should be enabled or not |
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136 | */ |
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137 | bool QtWin::enableBlurBehindWindow(QWidget *widget, bool enable) |
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138 | { |
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139 | Q_ASSERT(widget); |
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140 | bool result = false; |
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141 | #ifdef Q_OS_WIN32 |
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142 | if (resolveLibs()) { |
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143 | DWM_BLURBEHIND bb = {0}; |
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144 | HRESULT hr = S_OK; |
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145 | bb.fEnable = enable; |
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146 | bb.dwFlags = DWM_BB_ENABLE; |
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147 | bb.hRgnBlur = NULL; |
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148 | #endif |
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149 | widget->setAttribute(Qt::WA_TranslucentBackground, enable); |
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150 | widget->setAttribute(Qt::WA_NoSystemBackground, enable); |
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151 | #ifdef Q_OS_WIN32 |
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152 | hr = pDwmEnableBlurBehindWindow(HWND(widget->winId()), &bb); |
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153 | if (SUCCEEDED(hr)) { |
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154 | result = true; |
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155 | windowNotifier()->addWidget(widget); |
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156 | } |
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157 | } |
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158 | #endif |
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159 | return result; |
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160 | } |
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161 | |
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162 | /*! |
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163 | * ExtendFrameIntoClientArea. |
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164 | * |
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165 | * This controls the rendering of the frame inside the window. |
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166 | * Note that passing margins of -1 (the default value) will completely |
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167 | * remove the frame from the window. |
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168 | * |
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169 | * \note you should not call enableBlurBehindWindow before calling |
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170 | * this functions |
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171 | * |
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172 | * \a enable tells if the blur should be enabled or not |
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173 | */ |
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174 | bool QtWin::extendFrameIntoClientArea(QWidget *widget, int left, int top, int right, int bottom) |
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175 | { |
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176 | |
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177 | Q_ASSERT(widget); |
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178 | Q_UNUSED(widget); |
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179 | Q_UNUSED(left); |
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180 | Q_UNUSED(top); |
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181 | Q_UNUSED(right); |
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182 | Q_UNUSED(bottom); |
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183 | |
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184 | bool result = false; |
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185 | #ifdef Q_OS_WIN32 |
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186 | if (resolveLibs()) { |
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187 | QLibrary dwmLib(QString::fromAscii("dwmapi")); |
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188 | HRESULT hr = S_OK; |
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189 | MARGINS m = {left, top, right, bottom}; |
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190 | hr = pDwmExtendFrameIntoClientArea(HWND(widget->winId()), &m); |
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191 | if (SUCCEEDED(hr)) { |
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192 | result = true; |
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193 | windowNotifier()->addWidget(widget); |
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194 | } |
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195 | widget->setAttribute(Qt::WA_TranslucentBackground, result); |
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196 | } |
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197 | #endif |
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198 | return result; |
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199 | } |
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200 | |
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201 | /*! |
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202 | * Returns the current colorizationColor for the window. |
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203 | * |
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204 | * \a enable tells if the blur should be enabled or not |
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205 | */ |
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206 | QColor QtWin::colorizatinColor() |
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207 | { |
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208 | QColor resultColor = QApplication::palette().window().color(); |
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209 | |
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210 | #ifdef Q_OS_WIN32 |
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211 | if (resolveLibs()) { |
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212 | DWORD color = 0; |
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213 | BOOL opaque = FALSE; |
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214 | QLibrary dwmLib(QString::fromAscii("dwmapi")); |
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215 | HRESULT hr = S_OK; |
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216 | hr = pDwmGetColorizationColor(&color, &opaque); |
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217 | if (SUCCEEDED(hr)) |
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218 | resultColor = QColor(color); |
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219 | } |
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220 | #endif |
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221 | return resultColor; |
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222 | } |
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223 | |
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224 | #ifdef Q_OS_WIN32 |
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225 | WindowNotifier *QtWin::windowNotifier() |
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226 | { |
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227 | static WindowNotifier *windowNotifierInstance = 0; |
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228 | if (!windowNotifierInstance) |
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229 | windowNotifierInstance = new WindowNotifier; |
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230 | return windowNotifierInstance; |
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231 | } |
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232 | |
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233 | |
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234 | /* Notify all enabled windows that the DWM state changed */ |
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235 | bool WindowNotifier::winEvent(MSG *message, long *result) |
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236 | { |
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237 | if (message && message->message == WM_DWMCOMPOSITIONCHANGED) { |
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238 | bool compositionEnabled = QtWin::isCompositionEnabled(); |
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239 | foreach(QWidget * widget, widgets) { |
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240 | if (widget) { |
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241 | widget->setAttribute(Qt::WA_NoSystemBackground, compositionEnabled); |
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242 | } |
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243 | widget->update(); |
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244 | } |
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245 | } |
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246 | return QWidget::winEvent(message, result); |
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247 | } |
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248 | #endif |
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