Remove hover event from emoji picker

fixes #398

src/TextInputWidget.cpp

@@ -501,6 +501,7 @@ TextInputWidget::TextInputWidget(QWidget *parent)
         sendMessageBtn_->setIconSize(QSize(ButtonHeight, ButtonHeight));
 
         emojiBtn_ = new emoji::PickButton(this);
+        emojiBtn_->setToolTip(tr("Emoji"));
 
         QIcon emoji_icon;
         emoji_icon.addFile(":/icons/icons/ui/smile.png");

src/emoji/PickButton.cpp

@@ -24,25 +24,35 @@ using namespace emoji;
 
 // Number of milliseconds after which the panel will be hidden
 // if the mouse cursor is not on top of the widget.
-constexpr int TimeoutDuration = 300;
+constexpr int HIDE_TIMEOUT = 300;
 
 PickButton::PickButton(QWidget *parent)
   : FlatButton(parent)
   , panel_{nullptr}
 {
-        connect(&hideTimer_, &QTimer::timeout, this, [this]() {
+        connect(&hideTimer_, &QTimer::timeout, this, &PickButton::hidePanel);
+        connect(this, &QPushButton::clicked, this, [this]() {
+                if (panel_ && panel_->isVisible()) {
+                        hidePanel();
+                        return;
+                }
+
+                showPanel();
+        });
+}
+
+void
+PickButton::hidePanel()
+{
         if (panel_ && !panel_->underMouse()) {
                 hideTimer_.stop();
                 panel_->hide();
         }
-        });
 }
 
 void
-PickButton::enterEvent(QEvent *e)
+PickButton::showPanel()
 {
-        Q_UNUSED(e);
-
         if (panel_.isNull()) {
                 panel_ = QSharedPointer<Panel>(new Panel(this));
                 connect(panel_.data(), &Panel::emojiSelected, this, &PickButton::emojiSelected);
@@ -67,6 +77,6 @@ PickButton::enterEvent(QEvent *e)
 void
 PickButton::leaveEvent(QEvent *e)
 {
-        hideTimer_.start(TimeoutDuration);
+        hideTimer_.start(HIDE_TIMEOUT);
         FlatButton::leaveEvent(e);
 }

src/emoji/PickButton.h

@@ -37,10 +37,12 @@ signals:
         void emojiSelected(const QString &emoji);
 
 protected:
-        void enterEvent(QEvent *e) override;
         void leaveEvent(QEvent *e) override;
 
 private:
+        void showPanel();
+        void hidePanel();
+
         // Vertical distance from panel's bottom.
         int vertical_distance_ = 10;