refactor tabs to support centered icons

components/tabs.cpp

@@ -125,24 +125,17 @@ QColor Tabs::textColor() const
 }
 
 void Tabs::addTab(const QString &text)
+{
+    createTab(text);
+}
+
+void Tabs::addTab(const QString &text, const QIcon &icon)
 {
     Q_D(Tabs);
 
-    Tab *tab = new Tab(text);
-    tab->setCornerRadius(0);
-    tab->setRippleStyle(Material::CenteredRipple);
-    tab->setRole(Material::Primary);
-    tab->setBackgroundMode(Qt::OpaqueMode);
-    tab->setPeakOpacity(0.25);
-
-    d->tabLayout->addWidget(tab);
-
-    if (-1 == d->tab) {
-        d->tab = 0;
-        d->inkBar->refreshGeometry();
-    }
-
-    connect(tab, SIGNAL(clicked()), this, SLOT(switchTab()));
+    Tab *tab = createTab(text);
+    tab->setIcon(icon);
+    tab->setIconSize(QSize(24, 24));
 }
 
 void Tabs::setRippleStyle(Material::RippleStyle style)
@@ -202,3 +195,26 @@ void Tabs::switchTab()
         emit currentChanged(d->tab);
     }
 }
+
+Tab *Tabs::createTab(const QString &text)
+{
+    Q_D(Tabs);
+
+    Tab *tab = new Tab(text);
+    tab->setCornerRadius(0);
+    tab->setRippleStyle(Material::CenteredRipple);
+    tab->setRole(Material::Primary);
+    tab->setBackgroundMode(Qt::OpaqueMode);
+    tab->setPeakOpacity(0.25);
+
+    d->tabLayout->addWidget(tab);
+
+    if (-1 == d->tab) {
+        d->tab = 0;
+        d->inkBar->refreshGeometry();
+    }
+
+    connect(tab, SIGNAL(clicked()), this, SLOT(switchTab()));
+
+    return tab;
+}

components/tabs.h

@@ -5,6 +5,7 @@
 #include "lib/theme.h"
 
 class TabsPrivate;
+class Tab;
 
 class Tabs : public QWidget
 {
@@ -31,6 +32,7 @@ public:
     QColor textColor() const;
 
     void addTab(const QString &text);
+    void addTab(const QString &text, const QIcon &icon);
 
     void setRippleStyle(Material::RippleStyle style);
 
@@ -52,6 +54,8 @@ private slots:
 private:
     Q_DISABLE_COPY(Tabs)
     Q_DECLARE_PRIVATE(Tabs)
+
+    Tab *createTab(const QString &text);
 };
 
 #endif // TABS_H

components/tabs_internal.cpp

@@ -1,8 +1,12 @@
 #include "tabs_internal.h"
 #include <QLayout>
 #include <QPainter>
+#include <QStylePainter>
+#include <QStyleOptionButton>
 #include <QEvent>
+#include <QDebug>
 #include <QPropertyAnimation>
+#include <QtSvg/QSvgRenderer>
 #include "tabs.h"
 
 TabsInkBar::TabsInkBar(Tabs *parent)
@@ -101,7 +105,65 @@ Tab::~Tab()
 {
 }
 
+QSize Tab::sizeHint() const
+{
+    if (icon().isNull()) {
+        return FlatButton::sizeHint();
+    } else {
+        return QSize(40, iconSize().height() + 48);
+    }
+}
+
+void Tab::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event)
+
+    //FlatButton::paintEvent(event);
+
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+
+    QBrush brush;
+    brush.setStyle(Qt::SolidPattern);
+    brush.setColor(backgroundColor());
+    painter.setOpacity(1);
+    painter.setBrush(brush);
+    painter.setPen(Qt::NoPen);
+    painter.drawRect(rect());
+
+    QStylePainter style(this);
+
+    QStyleOptionButton option;
+    initStyleOption(&option);
+    option.features |= QStyleOptionButton::Flat;
+    option.iconSize = QSize(-1, -1);  // Let's not draw the icon right now
+
+    style.drawControl(QStyle::CE_PushButtonLabel, option);
+
+
+    if (!icon().isNull()) {
+        const QSize &size = iconSize();
+        icon().paint(&painter,
+                   QRect(QPoint((width()-size.width())/2, 0), size),
+                   Qt::AlignCenter,
+                   QIcon::Normal);
+    }
+
+    //
+
+    QPen pen;
+    pen.setColor(Qt::red);
+    pen.setWidth(2);
+    painter.setPen(pen);
+
+    painter.drawRect(rect());
+}
+
 void Tab::init()
 {
     setMinimumHeight(50);
+
+    QFont fnt(font());
+    fnt.setStyleName("Normal");
+    setFont(fnt);
 }

components/tabs_internal.h

@@ -45,6 +45,11 @@ public:
     explicit Tab(QString text, QWidget *parent = 0);
     ~Tab();
 
+    QSize sizeHint() const Q_DECL_OVERRIDE;
+
+protected:
+    void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
+
 private:
     Q_DISABLE_COPY(Tab)
 

examples/tabsexamples.cpp

@@ -1,6 +1,7 @@
 #include <QVBoxLayout>
 #include <QStackedLayout>
 #include <QLabel>
+#include <QIcon>
 #include "tabsexamples.h"
 #include "components/tabs.h"
 #include "frame.h"
@@ -84,9 +85,9 @@ TabsExamples::TabsExamples(QWidget *parent)
         layout->addLayout(stack);
         layout->setContentsMargins(0, 0, 0, 0);
 
-        tabs->addTab("First");
-        tabs->addTab("Second");
-        tabs->addTab("Third");
+        tabs->addTab("Listen", QIcon("../qt-material-widgets/ic_volume_up_white_24px.svg"));
+        tabs->addTab("Talk",   QIcon("../qt-material-widgets/ic_message_white_24px.svg"));
+        tabs->addTab("Eat",    QIcon("../qt-material-widgets/ic_local_dining_white_24px.svg"));
 
         QScrollArea *area = new QScrollArea;
         area->setWidget(widget);