Merge branch 'issue-1137'

FIXES #1137

CHANGES

@@ -14,6 +14,9 @@ This release contains contributions from (alphabetically by first name):
 
 ## Core ##
 
+ - The side-pane, which shows the list of steps that will be executed,
+   now tries to fit the text (name of each module) into the available space
+   by shrinking the font as needed. #1137
  - *libcalamares* (accidentally) linked with Qt's GUI libraries when
    PythonQt was found. This led to the odd situation where the non-GUI
    Calamares library depends on a bunch of GUI libraries.

src/calamares/CalamaresApplication.h

@@ -1,7 +1,7 @@
 /* === This file is part of Calamares - <https://github.com/calamares> ===
  *
  *   Copyright 2014-2015, Teo Mrnjavac <teo@kde.org>
- *   Copyright 2018, Adriaan de Groot <groot@kde.org>
+ *   Copyright 2018-2019, Adriaan de Groot <groot@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -24,8 +24,6 @@
 
 #include <QApplication>
 
-#define APP CalamaresApplication::instance()
-
 class CalamaresWindow;
 
 namespace Calamares

src/calamares/progresstree/ProgressTreeDelegate.cpp

@@ -1,7 +1,7 @@
 /* === This file is part of Calamares - <https://github.com/calamares> ===
  *
  *   Copyright 2014-2015, Teo Mrnjavac <teo@kde.org>
- *   Copyright 2017, Adriaan de Groot <groot@kde.org>
+ *   Copyright 2017, 2019, Adriaan de Groot <groot@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -18,28 +18,18 @@
  */
 
 #include "ProgressTreeDelegate.h"
+#include "ProgressTreeModel.h"
 
 #include "Branding.h"
 #include "CalamaresApplication.h"
 #include "CalamaresWindow.h"
-#include "ProgressTreeModel.h"
-#include "ViewManager.h"
-#include "ViewStepItem.h"
 
 #include "utils/CalamaresUtilsGui.h"
 
-#include <QAbstractItemView>
 #include <QPainter>
 
-#define ITEM_MARGIN 12
-#define VS_FONTSIZE CalamaresUtils::defaultFontSize() + 4
-
-ProgressTreeDelegate::ProgressTreeDelegate( QAbstractItemView* parent )
-    : QStyledItemDelegate( parent )
-    , m_parent( parent )
-{
-}
-
+static constexpr int const item_margin = 8;
+static inline int item_fontsize() { return CalamaresUtils::defaultFontSize() + 4; }
 
 QSize
 ProgressTreeDelegate::sizeHint( const QStyleOptionViewItem& option,
@@ -50,11 +40,11 @@ ProgressTreeDelegate::sizeHint( const QStyleOptionViewItem& option,
 
     QFont font = qApp->font();
 
-    font.setPointSize( VS_FONTSIZE );
+    font.setPointSize( item_fontsize() );
     QFontMetrics fm( font );
     int height = fm.height();
 
-    height += 2*ITEM_MARGIN; //margin
+    height += 2 * item_margin;
 
     return QSize( option.rect.width(), height );
 }
@@ -88,12 +78,9 @@ ProgressTreeDelegate::paintViewStep( QPainter* painter,
                                      const QStyleOptionViewItem& option,
                                      const QModelIndex& index ) const
 {
-    QRect textRect = option.rect.adjusted( ITEM_MARGIN,
-                                           ITEM_MARGIN,
-                                           ITEM_MARGIN,
-                                           ITEM_MARGIN );
+    QRect textRect = option.rect.adjusted( item_margin, item_margin, -item_margin, -item_margin );
     QFont font = qApp->font();
-    font.setPointSize( VS_FONTSIZE );
+    font.setPointSize( item_fontsize() );
     font.setBold( false );
     painter->setFont( font );
 
@@ -107,11 +94,37 @@ ProgressTreeDelegate::paintViewStep( QPainter* painter,
         QString textHighlight = Calamares::Branding::instance()->
                            styleString( Calamares::Branding::SidebarTextHighlight );
         if ( textHighlight.isEmpty() )
-            painter->setBrush( APP->mainWindow()->palette().background() );
+            painter->setBrush( CalamaresApplication::instance()->mainWindow()->palette().background() );
         else
             painter->setBrush( QColor( textHighlight ) );
     }
 
-    painter->fillRect( option.rect, painter->brush().color() );
-    painter->drawText( textRect, index.data().toString() );
+
+    // Draw the text at least once. If it doesn't fit, then shrink the font
+    // being used by 1 pt on each iteration, up to a maximum of maximumShrink
+    // times. On each loop, we'll have to blank out the rectangle again, so this
+    // is an expensive (in terms of drawing operations) thing to do.
+    //
+    // (The loop uses <= because the counter is incremented at the start).
+    static constexpr int const maximumShrink = 4;
+    int shrinkSteps = 0;
+    do
+    {
+        painter->fillRect( option.rect, painter->brush().color() );
+        shrinkSteps++;
+
+        QRectF boundingBox;
+        painter->drawText( textRect, Qt::AlignHCenter | Qt::AlignVCenter | Qt::TextSingleLine, index.data().toString(), &boundingBox );
+
+        // The extra check here is to avoid the changing-font-size if we're not going to use
+        // it in the next iteration of the loop anyway.
+        if ( ( shrinkSteps <= maximumShrink ) && (boundingBox.width() > textRect.width() ) )
+        {
+            font.setPointSize( item_fontsize() - shrinkSteps );
+            painter->setFont( font );
+        }
+        else
+            break;  // It fits
+    }
+    while ( shrinkSteps <= maximumShrink );
 }

src/calamares/progresstree/ProgressTreeDelegate.h

@@ -1,6 +1,7 @@
 /* === This file is part of Calamares - <https://github.com/calamares> ===
  *
  *   Copyright 2014-2015, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2019, Adriaan de Groot <groot@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -21,7 +22,6 @@
 
 #include <QStyledItemDelegate>
 
-
 /**
  * @brief The ProgressTreeDelegate class customizes the look and feel of the
  * ProgressTreeView elements.
@@ -29,9 +29,8 @@
  */
 class ProgressTreeDelegate : public QStyledItemDelegate
 {
-    Q_OBJECT
 public:
-    explicit ProgressTreeDelegate( QAbstractItemView* parent = nullptr );
+    using QStyledItemDelegate::QStyledItemDelegate;
 
 protected:
     QSize sizeHint( const QStyleOptionViewItem& option,
@@ -44,8 +43,6 @@ private:
     void paintViewStep( QPainter* painter,
                         const QStyleOptionViewItem& option,
                         const QModelIndex& index ) const;
-
-    QAbstractItemView* m_parent;
 };
 
 #endif // PROGRESSTREEDELEGATE_H