close button icon

toolbutton.cpp

@@ -0,0 +1,31 @@
+#include "toolbutton.h"
+
+#include <QPainter>
+#include <QGraphicsOpacityEffect>
+#include <QPropertyAnimation>
+
+ToolButton::ToolButton(QWidget *parent)
+    : QPushButton(parent)
+    , m_opacityFx(new QGraphicsOpacityEffect(this))
+    , m_opacityAnimation(new QPropertyAnimation(m_opacityFx, "opacity"))
+{
+    setFlat(true);
+    setFixedSize(50, 50);
+    setGraphicsEffect(m_opacityFx);
+    setStyleSheet("QPushButton {"
+                  "background: transparent;"
+                  "}"
+                  "QPushButton:hover {"
+                  "background: red;"
+                  "}");
+
+    m_opacityAnimation->setDuration(300);
+}
+
+void ToolButton::setIconOpacity(qreal opacity)
+{
+    m_opacityAnimation->stop();
+    m_opacityAnimation->setStartValue(m_opacityFx->opacity());
+    m_opacityAnimation->setEndValue(opacity);
+    m_opacityAnimation->start();
+}