added #69 (nice)

ui/collapsiblewidget.cpp

@@ -7,25 +7,34 @@
 #include <QHBoxLayout>
 #include <QVBoxLayout>
 #include <QPushButton>
+#include <QMouseEvent>
+#include <QWidget>
+
+CollapsibleWidget::CollapsibleWidget(QWidget* parent) : QWidget(parent) {
+    selected = false;
 
-CollapsibleWidget::CollapsibleWidget(QWidget* parent) : QWidget(parent)
-{
 	layout = new QVBoxLayout(this);
 	layout->setMargin(0);
 
-	title_bar = new QHBoxLayout();
-	title_bar->setMargin(0);
+    title_bar = new CollapsibleWidgetHeader();
+    title_bar->setFocusPolicy(Qt::ClickFocus);
+    title_bar->setAutoFillBackground(true);
+    QHBoxLayout* title_bar_layout = new QHBoxLayout();
+    title_bar->setLayout(title_bar_layout);
+    title_bar_layout->setMargin(0);
 	enabled_check = new QCheckBox();
 	enabled_check->setChecked(true);
 	header = new QLabel();
 	collapse_button = new QPushButton("-");
 	collapse_button->setMaximumWidth(25);
 	setText("<untitled>");
-	title_bar->addWidget(collapse_button);
-	title_bar->addWidget(enabled_check);
-	title_bar->addWidget(header);
-	title_bar->addStretch();
-	layout->addLayout(title_bar);
+    title_bar_layout->addWidget(collapse_button);
+    title_bar_layout->addWidget(enabled_check);
+    title_bar_layout->addWidget(header);
+    title_bar_layout->addStretch();
+    layout->addWidget(title_bar);
+
+    connect(title_bar, SIGNAL(select(bool, bool)), this, SLOT(header_click(bool, bool)));
 
 	line = new QFrame();
 	line->setFrameShape(QFrame::HLine);
@@ -35,6 +44,24 @@ CollapsibleWidget::CollapsibleWidget(QWidget* parent) : QWidget(parent)
 	contents = NULL;
 }
 
+void CollapsibleWidget::header_click(bool s, bool deselect) {
+    selected = s;
+    title_bar->selected = s;
+    if (s) {
+        QPalette p = palette();
+        p.setColor(QPalette::Background, QColor(255, 255, 255, 64));
+        title_bar->setPalette(p);
+    } else {
+        title_bar->setPalette(palette());
+    }
+    if (deselect) emit deselect_others(this);
+}
+
+bool CollapsibleWidget::is_focused() {
+    if (hasFocus()) return true;
+    return title_bar->hasFocus();
+}
+
 void CollapsibleWidget::setContents(QWidget* c) {
 	bool existing = (contents != NULL);
 	contents = c;
@@ -57,3 +84,19 @@ void CollapsibleWidget::on_visible_change() {
 	contents->setVisible(!contents->isVisible());
 	collapse_button->setText(contents->isVisible() ? "-" : "+");
 }
+
+CollapsibleWidgetHeader::CollapsibleWidgetHeader(QWidget* parent) : QWidget(parent) {
+    selected = false;
+}
+
+void CollapsibleWidgetHeader::mousePressEvent(QMouseEvent* event) {
+    if (selected) {
+        if ((event->modifiers() & Qt::ShiftModifier)) {
+            selected = false;
+            emit select(selected, false);
+        }
+    } else {
+        selected = true;
+        emit select(selected, !(event->modifiers() & Qt::ShiftModifier));
+    }
+}