diff widgets/ColourComboBox.cpp @ 1196:b1e3ee5f1be6 levelpanwidget

Introduce colour combobox class, to replace ad-hoc code in property box

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widgets/ColourComboBox.cpp	Fri Dec 16 13:08:33 2016 +0000
@@ -0,0 +1,101 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2007-2016 QMUL.
+    
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "ColourComboBox.h"
+
+#include "ColourNameDialog.h"
+
+#include "layer/ColourDatabase.h"
+
+#include "base/Debug.h"
+
+#include <QFontMetrics>
+#include <QColorDialog>
+
+#include <iostream>
+
+using namespace std;
+
+ColourComboBox::ColourComboBox(bool withAddNewColourEntry, QWidget *parent) :
+    NotifyingComboBox(parent),
+    m_withAddNewColourEntry(withAddNewColourEntry)
+{
+    setEditable(false);
+    rebuild();
+
+    connect(this, SIGNAL(activated(int)), this, SLOT(comboActivated(int)));
+    connect(ColourDatabase::getInstance(), SIGNAL(colourDatabaseChanged()),
+            this, SLOT(rebuild()));
+
+    if (count() < 20 && count() > maxVisibleItems()) {
+	setMaxVisibleItems(count());
+    }
+}
+
+void
+ColourComboBox::comboActivated(int index)
+{
+    if (!m_withAddNewColourEntry ||
+	index < int(ColourDatabase::getInstance()->getColourCount())) {
+	emit colourChanged(index);
+	return;
+    }
+    
+    QColor newColour = QColorDialog::getColor();
+    if (!newColour.isValid()) return;
+
+    ColourNameDialog dialog(tr("Name New Colour"),
+                            tr("Enter a name for the new colour:"),
+                            newColour, newColour.name(), this);
+    dialog.showDarkBackgroundCheckbox(tr("Prefer black background for this colour"));
+    if (dialog.exec() == QDialog::Accepted) {
+        //!!! command
+        ColourDatabase *db = ColourDatabase::getInstance();
+        int index = db->addColour(newColour, dialog.getColourName());
+        db->setUseDarkBackground(index, dialog.isDarkBackgroundChecked());
+	// addColour will have called back on rebuild(), and the new
+	// colour will be at the index previously occupied by Add New
+	// Colour, which is our current index
+	emit colourChanged(currentIndex());
+    }
+}
+
+void
+ColourComboBox::rebuild()
+{
+    blockSignals(true);
+
+    int ix = currentIndex();
+    
+    clear();
+
+    int size = (QFontMetrics(QFont()).height() * 2) / 3;
+    if (size < 12) size = 12;
+    
+    ColourDatabase *db = ColourDatabase::getInstance();
+    for (int i = 0; i < db->getColourCount(); ++i) {
+	QString name = db->getColourName(i);
+	addItem(db->getExamplePixmap(i, QSize(size, size)), name);
+    }
+
+    if (m_withAddNewColourEntry) {
+	addItem(tr("Add New Colour..."));
+    }
+
+    setCurrentIndex(ix);
+    
+    blockSignals(false);
+}
+