From 53d5ed96afbfa83c602e1661ef5a9ef53354b97c Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Tue, 19 Mar 2019 05:31:31 +0100
Subject: [PATCH] Ref T573, elide text messages for labels

---
 src/blackgui/guiutility.cpp | 39 +++++++++++++++++++++++++++++++++++++
 src/blackgui/guiutility.h   |  7 +++++++
 2 files changed, 46 insertions(+)

diff --git a/src/blackgui/guiutility.cpp b/src/blackgui/guiutility.cpp
index 2b78b20fe..a2a1bf4f8 100644
--- a/src/blackgui/guiutility.cpp
+++ b/src/blackgui/guiutility.cpp
@@ -31,6 +31,7 @@
 #include <QTabWidget>
 #include <QThreadStorage>
 #include <QWidget>
+#include <QLabel>
 #include <QTimer>
 #include <Qt>
 #include <QPointer>
@@ -645,4 +646,42 @@ namespace BlackGui
         }
         return nullptr;
     }
+
+    void CGuiUtility::setElidedText(QLabel *label, const QString &text, Qt::TextElideMode mode)
+    {
+        if (!label) { return; }
+
+        label->setToolTip(text);
+        if (mode == Qt::ElideNone)
+        {
+            label->setText(text);
+            return;
+        }
+
+        const QFontMetrics metrics(label->font());
+        const int width = qMax(label->width() - 2, 0);
+        const QString clippedText = metrics.elidedText(text, mode, width);
+        label->setText(clippedText);
+    }
+
+    void CGuiUtility::setElidedText(QLabel *label, const QString &shortText, const QString &longText, Qt::TextElideMode mode)
+    {
+        if (!label) { return; }
+        if (shortText.isEmpty()) { CGuiUtility::setElidedText(label, longText, mode); return; }
+        if (longText.isEmpty()) { CGuiUtility::setElidedText(label, shortText, mode); return; }
+
+        label->setToolTip(longText);
+        const QFontMetrics metrics(label->font());
+        const int width = qMax(label->width() - 2, 0);
+        const int wl = metrics.width(longText);
+        if (wl >= width) { label->setText(longText); return; }
+        if (qRound(wl * 0.85) > wl)
+        {
+            const QString clippedText = metrics.elidedText(longText, mode, width);
+            label->setText(clippedText);
+            return;
+        }
+        const QString clippedText = metrics.elidedText(shortText, mode, width);
+        label->setText(clippedText);
+    }
 } // ns
diff --git a/src/blackgui/guiutility.h b/src/blackgui/guiutility.h
index 17623067b..aea1b7783 100644
--- a/src/blackgui/guiutility.h
+++ b/src/blackgui/guiutility.h
@@ -32,6 +32,7 @@ class QMimeData;
 class QLineEdit;
 class QTabWidget;
 class QDialog;
+class QLabel;
 class QGraphicsOpacityEffect;
 class QAbstractItemModel;
 
@@ -237,6 +238,12 @@ namespace BlackGui
         //! Find parent dialog if there is any, otherwise null
         static QDialog *findParentDialog(QWidget *widget);
 
+        //! Set elided text
+        static void setElidedText(QLabel *label, const QString &text, Qt::TextElideMode mode = Qt::ElideMiddle);
+
+        //! Set elided text
+        static void setElidedText(QLabel *label, const QString &shortText, const QString &longText, Qt::TextElideMode mode = Qt::ElideMiddle);
+
     private:
         //! No constructor, use static functions only
         CGuiUtility() {}