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50 
51 //! [21]
52 qApp->setStyleSheet("QPushButton { color: white }");
53 //! [21]
54 
55 
56 //! [22]
57 myPushButton->setStyleSheet("* { color: blue }");
58 //! [22]
59 
60 
61 //! [23]
62 myPushButton->setStyleSheet("color: blue");
63 //! [23]
64 
65 
66 //! [24]
67 qApp->setStyleSheet("QGroupBox { color: red; } ");
68 //! [24]
69 
70 //! [25]
71 qApp->setStyleSheet("QGroupBox, QGroupBox * { color: red; }");
72 //! [25]
73 
74 
75 //! [26]
76 class MyPushButton : public QPushButton {
77     // ...
78 }
79 
80 // ...
81 qApp->setStyleSheet("MyPushButton { background: yellow; }");
82 //! [26]
83 
84 
85 //! [27]
86 namespace ns {
87     class MyPushButton : public QPushButton {
88         // ...
89     }
90 }
91 
92 // ...
93 qApp->setStyleSheet("ns--MyPushButton { background: yellow; }");
94 //! [27]
95 
96 
97 //! [32]
98 void CustomWidget::paintEvent(QPaintEvent *)
99 {
100     QStyleOption opt;
101     opt.init(this);
102     QPainter p(this);
103     style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
104 }
105 //! [32]
106 
107 
108 //! [88]
109 qApp->setStyleSheet("QLineEdit { background-color: yellow }");
110 //! [88]
111 
112 
113 //! [89]
114 myDialog->setStyleSheet("QLineEdit { background-color: yellow }");
115 //! [89]
116 
117 
118 //! [90]
119 myDialog->setStyleSheet("QLineEdit#nameEdit { background-color: yellow }");
120 //! [90]
121 
122 
123 //! [91]
124 nameEdit->setStyleSheet("background-color: yellow");
125 //! [91]
126 
127 
128 //! [92]
129 nameEdit->setStyleSheet("color: blue; background-color: yellow");
130 //! [92]
131 
132 
133 //! [93]
134 nameEdit->setStyleSheet("color: blue;"
135                         "background-color: yellow;"
136                         "selection-color: yellow;"
137                         "selection-background-color: blue;");
138 //! [93]
139 
140 
141 //! [95]
142 QLineEdit *nameEdit = new QLineEdit(this);
143 nameEdit->setProperty("mandatoryField", true);
144 
145 QLineEdit *emailEdit = new QLineEdit(this);
146 emailEdit->setProperty("mandatoryField", true);
147 
148 QSpinBox *ageSpinBox = new QSpinBox(this);
149 ageSpinBox->setProperty("mandatoryField", true);
150 //! [95]
151 
152 //! [96]
153 QCoreApplication::setAttribute(Qt::AA_UseStyleSheetPropagationInWidgetStyles, true);
154 //! [96]
155