Ref T515, elided PushButton

src/blackgui/elidedpushbutton.cpp

@@ -0,0 +1,44 @@
+/* Copyright (C) 2019
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "elidedpushbutton.h"
+
+#include <QPainter>
+#include <QTextLine>
+#include <QFontMetrics>
+
+namespace BlackGui
+{
+    CElidedPushButton::CElidedPushButton(QWidget *parent) : QPushButton(parent)
+    { }
+
+    CElidedPushButton::CElidedPushButton(const QString &text, QWidget *parent)
+        : QPushButton(parent), m_elided(false), m_content(text)
+    {
+        this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+    }
+
+    void CElidedPushButton::setText(const QString &newText)
+    {
+        m_content = newText;
+        this->update();
+    }
+
+    void CElidedPushButton::paintEvent(QPaintEvent *event)
+    {
+        QPainter painter(this);
+        const QFontMetrics fontMetrics = painter.fontMetrics();
+        const int usableWidth = qRound(0.9 * this->width());
+
+        const QString elidedText = fontMetrics.elidedText(m_content, Qt::ElideRight, usableWidth);
+        m_elided = (elidedText != m_content);
+        QPushButton::setText(elidedText);
+        QPushButton::paintEvent(event);
+    }
+} // ns