Add a color picker widget to pick a color on the screen, without having to open the...

[kdenlive] / src / colorpickerwidget.h

diff --git a/src/colorpickerwidget.h b/src/colorpickerwidget.h
new file mode 100644 (file)
index 0000000..f85e0f4
--- /dev/null
+++ b/src/colorpickerwidget.h
@@ -0,0 +1,69 @@
+/***************************************************************************
+ *   Copyright (C) 2010 by Till Theato (root@ttill.de)                     *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
+ ***************************************************************************/
+
+
+#ifndef COLORPICKERWIDGET_H
+#define COLORPICKERWIDGET_H
+
+#include <QtCore>
+#include <QWidget>
+
+#ifdef Q_WS_X11
+class KCDPickerFilter;
+#endif
+
+/**
+ * @class ColorPickerWidget
+ * @brief A widget to pick a color anywhere on the screen.
+ * @author Till Theato
+ *
+ * The code is based on the color picker in KColorDialog. 
+ */
+
+class ColorPickerWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    /** @brief Sets up the widget. */
+    ColorPickerWidget(QWidget *parent = 0);
+    /** @brief Makes sure the event filter is removed. */
+    virtual ~ColorPickerWidget();
+
+protected:
+    virtual void mouseReleaseEvent(QMouseEvent *event);
+    virtual void keyPressEvent(QKeyEvent *event);
+
+private:
+    /** @brief Closes the event filter and makes mouse and keyboard work again on other widgets/windows. */
+    void closeEventFilter();
+    bool m_filterActive;
+#ifdef Q_WS_X11
+    KCDPickerFilter *m_filter;
+#endif 
+
+private slots:
+    /** @brief Sets up an event filter for picking a color. */
+    void slotSetupEventFilter();
+
+signals:
+    void colorPicked(QColor);
+};
+
+#endif