add toolbuttons for changing view

Signed-off-by: Le Tan <tamlokveer@gmail.com>

src/resources/icons/expand.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 16.2.1, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="512px" height="512px" viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
+<g>
+	<polygon points="274,209.7 337.9,145.9 288,96 416,96 416,224 366.1,174.1 302.3,238 	"/>
+	<polygon points="274,302.3 337.9,366.1 288,416 416,416 416,288 366.1,337.9 302.3,274 	"/>
+	<polygon points="238,302.3 174.1,366.1 224,416 96,416 96,288 145.9,337.9 209.7,274 	"/>
+	<polygon points="238,209.7 174.1,145.9 224,96 96,96 96,224 145.9,174.1 209.7,238 	"/>
+</g>
+</svg>

src/resources/icons/one_panel.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg">
+ <!-- Created with SVG-edit - http://svg-edit.googlecode.com/ -->
+ <title>one_panel</title>
+ <g>
+  <title>Layer 1</title>
+  <rect id="svg_1" height="395" width="395" y="57" x="58" stroke-width="40" stroke="#000000" fill="none"/>
+  <line id="svg_4" y2="455" x2="193" y1="61" x1="193" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="40" stroke="#000000" fill="none"/>
+ </g>
+</svg>

src/resources/icons/two_panels.svg

@@ -0,0 +1,11 @@
+<?xml version="1.0"?>
+<svg width="512" height="512" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg">
+ <!-- Created with SVG-edit - http://svg-edit.googlecode.com/ -->
+ <title>one_panel</title>
+ <g>
+  <title>Layer 1</title>
+  <rect id="svg_1" height="395" width="395" y="57" x="58" stroke-width="40" stroke="#000000" fill="none"/>
+  <line id="svg_4" y2="454" x2="153" y1="60" x1="153" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="40" stroke="#000000" fill="none"/>
+  <line id="svg_5" y2="451.005195" x2="246" y1="66" x1="246" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="40" stroke="#000000" fill="none"/>
+ </g>
+</svg>

src/vmainwindow.cpp

@@ -179,6 +179,27 @@ void VMainWindow::initActions()
     connect(saveNoteAct, &QAction::triggered,
             tabs, &VTabWidget::saveFile);
 
+    viewAct = new QActionGroup(this);
+    twoPanelViewAct = new QAction(QIcon(":/resources/icons/two_panels.svg"),
+                                  tr("&Two Panels"), viewAct);
+    twoPanelViewAct->setStatusTip(tr("Display the directory and notes browser panel"));
+    twoPanelViewAct->setCheckable(true);
+    twoPanelViewAct->setData(2);
+    onePanelViewAct = new QAction(QIcon(":/resources/icons/one_panel.svg"),
+                                  tr("&Single panel"), viewAct);
+    onePanelViewAct->setStatusTip(tr("Display only the notes browser panel"));
+    onePanelViewAct->setCheckable(true);
+    onePanelViewAct->setData(1);
+    expandViewAct = new QAction(QIcon(":/resources/icons/expand.svg"),
+                                tr("&Expand"), viewAct);
+    expandViewAct->setStatusTip(tr("Expand the editing area"));
+    expandViewAct->setCheckable(true);
+    expandViewAct->setData(0);
+    connect(viewAct, &QActionGroup::triggered,
+            this, &VMainWindow::changePanelView);
+    // Must be called after setting up the signal to sync the state and settings
+    twoPanelViewAct->setChecked(true);
+
     importNoteAct = new QAction(tr("&Import note from file"), this);
     importNoteAct->setStatusTip(tr("Import notes into current directory from files"));
     connect(importNoteAct, &QAction::triggered,
@@ -239,7 +260,6 @@ void VMainWindow::initActions()
 void VMainWindow::initToolBar()
 {
     QToolBar *fileToolBar = addToolBar(tr("Note"));
-    fileToolBar->setMovable(false);
     fileToolBar->addAction(newNoteAct);
     fileToolBar->addAction(editNoteAct);
     fileToolBar->addAction(saveExitAct);
@@ -250,6 +270,11 @@ void VMainWindow::initToolBar()
     saveExitAct->setVisible(false);
     discardExitAct->setVisible(false);
     saveNoteAct->setVisible(false);
+
+    QToolBar *viewToolBar = addToolBar(tr("View"));
+    viewToolBar->addAction(twoPanelViewAct);
+    viewToolBar->addAction(onePanelViewAct);
+    viewToolBar->addAction(expandViewAct);
 }
 
 void VMainWindow::initMenuBar()
@@ -634,3 +659,39 @@ void VMainWindow::updateToolbarFromTabChage(const QString &notebook, const QStri
         saveNoteAct->setVisible(false);
     }
 }
+
+void VMainWindow::changePanelView(QAction *action)
+{
+    if (!action) {
+        return;
+    }
+    int nrPanel = action->data().toInt();
+
+    changeSplitterView(nrPanel);
+}
+
+void VMainWindow::changeSplitterView(int nrPanel)
+{
+    switch (nrPanel) {
+    case 0:
+        // Expand
+        mainSplitter->widget(0)->hide();
+        mainSplitter->widget(1)->hide();
+        mainSplitter->widget(2)->show();
+        break;
+    case 1:
+        // Single panel
+        mainSplitter->widget(0)->hide();
+        mainSplitter->widget(1)->show();
+        mainSplitter->widget(2)->show();
+        break;
+    case 2:
+        // Two panels
+        mainSplitter->widget(0)->show();
+        mainSplitter->widget(1)->show();
+        mainSplitter->widget(2)->show();
+        break;
+    default:
+        qWarning() << "error: invalid panel number" << nrPanel;
+    }
+}

src/vmainwindow.h

@@ -46,6 +46,7 @@ private slots:
     void setRenderBackgroundColor(QAction *action);
     void updateToolbarFromTabChage(const QString &notebook, const QString &relativePath,
                                    bool editMode, bool modifiable);
+    void changePanelView(QAction *action);
 
 signals:
     void curNotebookChanged(const QString &notebookName);
@@ -59,6 +60,7 @@ private:
     void initPredefinedColorPixmaps();
     void initRenderBackgroundMenu(QMenu *menu);
     void initEditorBackgroundMenu(QMenu *menu);
+    void changeSplitterView(int nrPanel);
 
     // If true, comboBox changes will not trigger any signal out
     bool notebookComboMuted;
@@ -84,6 +86,10 @@ private:
     QAction *saveNoteAct;
     QAction *saveExitAct;
     QAction *discardExitAct;
+    QActionGroup *viewAct;
+    QAction *twoPanelViewAct;
+    QAction *onePanelViewAct;
+    QAction *expandViewAct;
     QAction *importNoteAct;
     QActionGroup *converterAct;
     QAction *markedAct;

src/vnote.qrc

@@ -50,5 +50,8 @@
         <file>resources/icons/note_info.svg</file>
         <file>resources/icons/dir_info.svg</file>
         <file>resources/icons/notebook_info.svg</file>
+        <file>resources/icons/expand.svg</file>
+        <file>resources/icons/two_panels.svg</file>
+        <file>resources/icons/one_panel.svg</file>
     </qresource>
 </RCC>