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git-svn-id: svn://db.shs.com.ru/libs@1 a8b55f48-bf90-11e4-a774-851b48703e85

qad_widgets/colorbutton.cpp

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+#include "colorbutton.h"
+#include <QDebug>
+#include <QDrag>
+#include <QMimeData>
+
+ColorButton::ColorButton(QWidget * parent): QPushButton(parent) {
+	frame = false;
+	options = QColorDialog::ShowAlphaChannel;
+	back = new QWidget(this);
+	back->setAutoFillBackground(true);
+	back->show();
+	pal = back->palette();
+	pal.setBrush(back->backgroundRole(), QBrush(QImage(":/icons/alpha.png")));
+	back->setPalette(pal);
+	label = new QFrame(this);
+	label->setAutoFillBackground(true);
+	label->setFrameStyle(QFrame::Panel | QFrame::Sunken);
+	label->show();
+	pal = label->palette();
+	menu.addAction(QIcon(":/icons/edit-copy.png"), tr("Copy"), this, SLOT(copy()));
+	menu.addAction(QIcon(":/icons/edit-paste.png"), tr("Paste"), this, SLOT(paste()));
+	menu.addSeparator();
+	menu.addAction(tr("Mix with clipboard"), this, SLOT(mix()));
+	setAcceptDrops(true);
+	connect(this, SIGNAL(clicked(bool)), this, SLOT(clicked()));
+}
+
+
+ColorButton::~ColorButton() {
+	delete label;
+}
+
+
+void ColorButton::resizeEvent(QResizeEvent * ) {
+	if (frame) back->setGeometry(rect());
+	else back->setGeometry(8, 5, width() - 16, height() - 12);
+	label->setGeometry(back->geometry());
+}
+
+
+void ColorButton::mousePressEvent(QMouseEvent * e) {
+	pp = e->pos();
+	if (e->buttons().testFlag(Qt::RightButton)) {
+		menu.popup(e->globalPos());
+		return;
+	}
+	QPushButton::mousePressEvent(e);
+}
+
+
+void ColorButton::mouseMoveEvent(QMouseEvent * e) {
+	if (e->buttons().testFlag(Qt::LeftButton)) {
+		if ((e->pos() - pp).manhattanLength() > QApplication::startDragDistance()) {
+			setDown(false);
+			QDrag * drag = new QDrag(this);
+			QMimeData * data = new QMimeData();
+			data->setColorData(color());
+			drag->setMimeData(data);
+			drag->exec(Qt::CopyAction);
+			return;
+		}
+	}
+	QPushButton::mouseMoveEvent(e);
+}
+
+
+void ColorButton::dragEnterEvent(QDragEnterEvent * e) {
+	e->accept();
+	QPushButton::dragEnterEvent(e);
+}
+
+
+void ColorButton::dropEvent(QDropEvent * e) {
+	const QMimeData * data = e->mimeData();
+	QColor c = qvariant_cast<QColor>(data->colorData());
+	if (c.isValid()) {
+		setColor(c);
+		return;
+	}
+	c = QColor(data->text());
+	if (c.isValid()) {
+		setColor(c);
+		return;
+	}
+	QPushButton::dropEvent(e);
+}
+
+
+void ColorButton::clicked() {
+	QColor ret = QColorDialog::getColor(color(), this, tr("Choose color"), options);
+	if (!ret.isValid()) return;
+	setColor(ret);
+}
+
+
+void ColorButton::mix() {
+	QColor c(QApplication::clipboard()->text());
+	if (!c.isValid()) return;
+	QColor sc = color();
+	setColor(QColor((c.red() + sc.red()) / 2, (c.green() + sc.green()) / 2, (c.blue() + sc.blue()) / 2, (c.alpha() + sc.alpha()) / 2));
+}
+
+
+void ColorButton::setColor(const QColor & col) {
+	if (pal.color(label->backgroundRole()) == col) return;
+	if (options.testFlag(QColorDialog::ShowAlphaChannel))
+		pal.setColor(label->backgroundRole(), col);
+	else
+		pal.setColor(label->backgroundRole(), QColor(col.red(), col.green(), col.blue()));
+	label->setPalette(pal);
+	emit colorChanged(color());
+}