refs #312, Navigator (aka navigation bars)

* different dyn. property names for main window, dock window and infoarea
* dyn.properties for nested QWidgets
* style sheet for navigator
* utility function to delete layout
* added standard OS icons, some formatting in CICons
* actions in main window to be used in navigator
* main window becomes normal window when minimized so it is correctly displayed in Win taskbar

Remark: Frameless floating dockwidgets with rounded borders not yet working

src/blackgui/components/navigatordockwidget.cpp

@@ -8,9 +8,17 @@
  */
 
 #include "navigatordockwidget.h"
+#include "blackgui/infoarea.h"
+#include "blackgui/guiutility.h"
+#include "blackgui/stylesheetutility.h"
 #include "ui_navigatordockwidget.h"
 
+#include <QToolButton>
+#include <QGridLayout>
+#include <QAction>
+
 using namespace BlackGui;
+using namespace BlackMisc;
 
 namespace BlackGui
 {
@@ -27,5 +35,130 @@ namespace BlackGui
         CNavigatorDockWidget::~CNavigatorDockWidget()
         { }
 
+        void CNavigatorDockWidget::addAction(QAction *action)
+        {
+            if (action)
+            {
+                this->m_actions.append(action);
+                QToolButton *tb = new QToolButton(this->ui->fr_NavigatorDockWidgetInner);
+                tb->setDefaultAction(action);
+                tb->setObjectName(this->objectName().append(":").append(action->objectName()));
+                this->m_widgets.append(tb);
+            }
+        }
+
+        void CNavigatorDockWidget::addActions(QList<QAction *> actions)
+        {
+            if (actions.isEmpty()) { return; }
+            for (QAction *a : actions)
+            {
+                this->addAction(a);
+            }
+        }
+
+        void CNavigatorDockWidget::buildNavigator(int columns)
+        {
+            if (m_firstBuild)
+            {
+                m_firstBuild = false;
+                this->insertOwnActions();
+            }
+
+            // remove old layout
+            CGuiUtility::deleteLayout(this->ui->fr_NavigatorDockWidgetInner->layout(), false);
+
+            // new layout
+            QGridLayout *gridLayout = new QGridLayout(this->ui->fr_NavigatorDockWidgetInner);
+            gridLayout->setObjectName("gl_CNavigatorDockWidget");
+            gridLayout->setSpacing(0);
+            gridLayout->setMargin(0);
+            gridLayout->setContentsMargins(0, 0, 0, 0);
+
+            this->ui->fr_NavigatorDockWidgetInner->setLayout(gridLayout);
+            int r = 0;
+            int c = 0;
+            for (int i = 0; i < this->m_widgets.size(); i++)
+            {
+                gridLayout->addWidget(this->m_widgets[i], r, c++);
+                this->m_widgets[i]->show();
+                if (c < columns) { continue; }
+                c = 0;
+                r++;
+            }
+
+            // set the real values
+            c = gridLayout->columnCount();
+            r = gridLayout->rowCount();
+            this->setMinimumSizeForWidgets(r, c);
+
+            // sizes
+            QSize ws(gridLayout->sizeHint());
+            this->resize(ws);
+
+            // see documentation, required as layout was changed
+            // this requires setting widget again
+            this->ui->fr_NavigatorDockWidgetInner->show();
+            this->setWidget(this->ui->fr_NavigatorDockWidgetInner);
+        }
+
+        void CNavigatorDockWidget::addToContextMenu(QMenu *contextMenu) const
+        {
+            QAction *a;
+            a = contextMenu->addAction(CIcons::resize16(), "1 row", this, SLOT(ps_changeLayout()));
+            a->setData("1r");
+            a = contextMenu->addAction(CIcons::resize16(), "2 rows", this, SLOT(ps_changeLayout()));
+            a->setData("2r");
+            a = contextMenu->addAction(CIcons::resize16(), "1 column", this, SLOT(ps_changeLayout()));
+            a->setData("1c");
+            a = contextMenu->addAction(CIcons::resize16(), "2 columns", this, SLOT(ps_changeLayout()));
+            a->setData("2c");
+            contextMenu->addSeparator();
+            CDockWidgetInfoArea::addToContextMenu(contextMenu);
+        }
+
+        void CNavigatorDockWidget::ps_onStyleSheetsChanged()
+        {
+            const QString fn(CStyleSheetUtility::fileNameNavigator());
+            const QString qss(CStyleSheetUtility::instance().style(fn));
+            this->setStyleSheet(qss);
+        }
+
+        void CNavigatorDockWidget::ps_changeLayout()
+        {
+            QAction *a = qobject_cast<QAction *>(QObject::sender());
+            if (!a) { return; }
+            QString v(a->data().toString());
+            if (v == "1c") { buildNavigator(1);}
+            else if (v == "2c") { buildNavigator(2);}
+            else if (v == "1r") { buildNavigator(columnsForRows(1));}
+            else if (v == "2r") { buildNavigator(columnsForRows(2));}
+        }
+
+        void CNavigatorDockWidget::insertOwnActions()
+        {
+            QIcon i(CIcons::changeIconBackgroundColor(this->style()->standardIcon(QStyle::SP_TitleBarCloseButton), Qt::white, QSize(16, 16)));
+            QAction *a = new QAction(i, "Close", this);
+            connect(a, &QAction::triggered, this, &CNavigatorDockWidget::close);
+            this->addAction(a);
+        }
+
+        int CNavigatorDockWidget::columnsForRows(int rows)
+        {
+            Q_ASSERT(rows >= 0);
+            int items = this->m_widgets.size();
+            int c = items / rows;
+            return (c * rows) < items ? c + 1 : c;
+        }
+
+        void CNavigatorDockWidget::setMinimumSizeForWidgets(int rows, int columns)
+        {
+            int w = 10 * columns;
+            int h = 10 * rows;
+            QSize min(w, h);
+            this->ui->qw_NavigatorDockWidgetOuter->setMinimumSize(min);
+            this->ui->fr_NavigatorDockWidgetInner->setMinimumSize(min);
+            this->setMinimumSize(min);
+        }
+
     } // ns
 } // ns