Developer Documentation

QtColorChooserButton.cc
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40 \*===========================================================================*/
41
42
43 #include "QtColorChooserButton.hh"
44
45 #include <QStyleOption>
46 #include <QStylePainter>
47 #include <QColorDialog>
48
49 #include <iostream>
50
51 QtColorChooserButton::QtColorChooserButton(QWidget *parent) :
52 QPushButton(parent), color_(0xE0, 0x20, 0x20) {
53
54 init();
55 }
56 QtColorChooserButton::QtColorChooserButton(const QString &text, QWidget *parent) :
57 QPushButton(text, parent), color_(0xE0, 0x20, 0x20) {
58
59 init();
60 }
61 QtColorChooserButton::QtColorChooserButton(const QIcon& icon, const QString &text, QWidget *parent) :
62 QPushButton(icon, text, parent), color_(0xE0, 0x20, 0x20) {
63
64 init();
65 }
66
67 QtColorChooserButton::~QtColorChooserButton() {
68 }
69
70 void QtColorChooserButton::init() {
71 connect(this, SIGNAL( clicked() ), this, SLOT( onClick() ) );
72 }
73
74 void QtColorChooserButton::onClick() {
75 QColor newColor = QColorDialog::getColor(color_, this, "Pick Color", QColorDialog::ShowAlphaChannel);
76 if (newColor.isValid()) {
77 color_ = newColor;
78 emit colorChanged(color_);
79 }
80 }
81
82 void QtColorChooserButton::paintEvent(QPaintEvent *ev) {
83 QStyleOptionButton buttonOptions;
84 initStyleOption(&buttonOptions);
85 QStylePainter painter(this);
86
87 const int textWd = buttonOptions.fontMetrics.width(buttonOptions.text);
88 QRect textRect = buttonOptions.rect;
89 textRect.setWidth(std::min(textRect.width(), textWd));
90 painter.drawItemText(textRect, Qt::TextSingleLine | Qt::TextShowMnemonic | Qt::AlignVCenter,
91 this->palette(), this->isEnabled(), buttonOptions.text, QPalette::ButtonText);
92
93 buttonOptions.rect.adjust(textWd, 0, 0, 0);
94 painter.drawControl(QStyle::CE_PushButtonBevel, buttonOptions);
95
96 QRect colorRect = this->style()->subElementRect(QStyle::SE_PushButtonFocusRect, &buttonOptions, this);
97 QStyleOptionFrame frameOptions;
98 frameOptions.state = QStyle::State_Sunken;
99 frameOptions.rect = colorRect;
100 frameOptions.features = QStyleOptionFrame::None;
101
102 /*
103 * Draw checker board pattern.
104 */
105 if (this->isEnabled()) {
106 static const int checkerSize = 7;
107 static const QColor checkerColA(0xFF, 0xFF, 0xFF);
108 static const QColor checkerColB(0x30, 0x30, 0x30);
109 painter.setClipRect(colorRect, Qt::IntersectClip);
110 for (int x = 0; x < colorRect.width() / checkerSize + 1; ++x) {
111 for (int y = 0; y < colorRect.height() / checkerSize + 1; ++y) {
112 painter.fillRect(colorRect.x() + x * checkerSize, colorRect.y() + y * checkerSize,
113 checkerSize, checkerSize,
114 (x % 2 == y % 2) ? checkerColA : checkerColB);
115 }
116 }
117
118 painter.fillRect(colorRect, color_);
119 }
120 painter.drawPrimitive(QStyle::PE_FrameButtonBevel, frameOptions);
121 }
OpenMesh::Attributes::None
Clear all attribute bits.
Definition: Attributes.hh:81