2 files changed, 101 insertions, 0 deletions
diff --git a/src/widgets/elidedlabel/elidedlabel.cpp b/src/widgets/elidedlabel/elidedlabel.cpp
new file mode 100644
index 0000000..e870959
--- /dev/null
+++ b/src/widgets/elidedlabel/elidedlabel.cpp
@@ -0,0 +1,52 @@
+#include "elidedlabel.h"
+
+#include <QDebug>
+#include <QPainter>
+#include <QResizeEvent>
+#include <QStyle>
+
+ElidedLabel::ElidedLabel(QWidget *parent)
+    : QLabel(parent), m_elide_mode(Qt::ElideRight) {
+  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
+}
+
+ElidedLabel::ElidedLabel(const QString &txt, QWidget *parent)
+    : QLabel(txt, parent), m_elide_mode(Qt::ElideRight) {
+  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
+}
+
+ElidedLabel::ElidedLabel(const QString &txt, Qt::TextElideMode elideMode,
+                         QWidget *parent)
+    : QLabel(txt, parent), m_elide_mode(elideMode) {
+  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
+}
+
+void ElidedLabel::setText(const QString &txt) {
+  QLabel::setText(txt);
+  cacheElidedText(geometry().width());
+  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
+}
+
+void ElidedLabel::cacheElidedText(int w) {
+  m_cached_elided_text = fontMetrics().elidedText(
+      text(), m_elide_mode, w, (buddy() == nullptr) ? 0 : Qt::TextShowMnemonic);
+}
+
+void ElidedLabel::resizeEvent(QResizeEvent *e) {
+  QLabel::resizeEvent(e);
+  cacheElidedText(e->size().width());
+}
+
+void ElidedLabel::paintEvent(QPaintEvent *e) {
+  if (m_elide_mode == Qt::ElideNone) {
+    QLabel::paintEvent(e);
+  } else {
+    QPainter p(this);
+    p.drawText(0, 0, geometry().width(), geometry().height(),
+               QStyle::visualAlignment(text().isRightToLeft() ? Qt::RightToLeft
+                                                              : Qt::LeftToRight,
+                                       alignment()) |
+                   ((buddy() == nullptr) ? 0 : Qt::TextShowMnemonic),
+               m_cached_elided_text);
+  }
+}
diff --git a/src/widgets/elidedlabel/elidedlabel.h b/src/widgets/elidedlabel/elidedlabel.h
new file mode 100644
index 0000000..7dc610a
--- /dev/null
+++ b/src/widgets/elidedlabel/elidedlabel.h
@@ -0,0 +1,49 @@
+#pragma once
+#include <QLabel>
+#include <QPainter>
+#include <QResizeEvent>
+#include <QString>
+#include <QFont>
+
+// A label that elides its text when not enough geometry is available to show all of the text.
+// Currently only capable of one-line.
+class ElidedLabel : public QLabel {
+    Q_OBJECT
+
+private:
+    Qt::TextElideMode m_elide_mode;
+    QString m_cached_elided_text;
+
+
+public:
+    ElidedLabel(QWidget* parent = NULL);
+    ElidedLabel(const QString& txt, QWidget* parent = NULL);
+    ElidedLabel(const QString& txt, Qt::TextElideMode elideMode = Qt::ElideRight, QWidget* parent = NULL);
+
+public:
+    // Set the elide mode used for displaying text.
+    inline void setElideMode(Qt::TextElideMode elideMode) {
+        m_elide_mode = elideMode;
+        updateGeometry();
+    }
+
+    // Get the elide mode currently used to display text.
+    inline Qt::TextElideMode elideMode() const {
+        return m_elide_mode;
+    }
+
+
+
+public: // QLabel overrides
+    void setText(const QString&); // note: not virtual so no polymorphism ...
+
+
+protected: // QLabel overrides
+    virtual void paintEvent(QPaintEvent*) override;
+    virtual void resizeEvent(QResizeEvent*) override;
+
+protected:
+    // Cache the elided text so as to not recompute it every paint event
+    void cacheElidedText(int w);
+
+};