Filesystem Explorer Example: Introduce version 2

This updated version addresses several bugs and misbehaviors that were
identified in the previous version. I have rewritten and improved
various aspects of the application to provide a more stable and reliable
user experience.
Here are some of the key changes and enhancements in version 2:

  - Fix qmllint warnings.
  - Reduce the number of redundant items
  - Apply the custom window decorations inside MyMenuBar
    to the contentItem instead of the background to scale
    properly.
  - Fix additional scaling and UI misbehaviors

  - Add an application icon
  - Add an editor with line numbers
  - Add command line options to specify an initial directory
  - Since rootIndex is exposed inside TreeView since 6.6
    this is an excellent opportunity to make use of it
  - Crosslink the python version of this example in the docs

Pick-to: 6.6
Change-Id: Ib816a95f843b3f4b84b11db893facda0ffc6f482
Reviewed-by: Mitch Curtis <[email protected]>
Reviewed-by: Qt CI Bot <[email protected]>

1 files changed, 49 insertions, 8 deletions

diff --git a/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp b/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp
index e383a0ea29..b580bced05 100644
--- a/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp
+++ b/examples/quickcontrols/filesystemexplorer/filesystemmodel.cpp
@@ -3,18 +3,15 @@
 
 #include "filesystemmodel.h"
 
-#include <QMimeDatabase>
 #include <QStandardPaths>
+#include <QMimeDatabase>
+#include <QTextDocument>
+#include <QTextObject>
 
 FileSystemModel::FileSystemModel(QObject *parent) : QFileSystemModel(parent)
 {
-    setRootPath(QStandardPaths::writableLocation(QStandardPaths::HomeLocation));
-}
-
-int FileSystemModel::columnCount(const QModelIndex &parent) const
-{
-    Q_UNUSED(parent);
-    return 1;
+    setFilter(QDir::AllEntries | QDir::Hidden | QDir::NoDotAndDotDot);
+    setInitialDirectory();
 }
 
 QString FileSystemModel::readFile(const QString &filePath)
@@ -46,3 +43,47 @@ QString FileSystemModel::readFile(const QString &filePath)
     }
     return tr("Filetype not supported!");
 }
+
+// This function gets called from Editor.qml
+int FileSystemModel::currentLineNumber(QQuickTextDocument *textDocument, int cursorPosition)
+{
+    if (QTextDocument *td = textDocument->textDocument()) {
+        QTextBlock tb = td->findBlock(cursorPosition);
+        return tb.blockNumber();
+    }
+    return -1;
+}
+
+int FileSystemModel::columnCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent)
+    return 1;
+}
+
+QModelIndex FileSystemModel::rootIndex() const
+{
+    return m_rootIndex;
+}
+
+void FileSystemModel::setRootIndex(const QModelIndex index)
+{
+    if (index == m_rootIndex)
+        return;
+    m_rootIndex = index;
+    emit rootIndexChanged();
+}
+
+void FileSystemModel::setInitialDirectory(const QString &path)
+{
+    QDir dir(path);
+    if (dir.makeAbsolute())
+        setRootPath(dir.path());
+    else
+        setRootPath(getDefaultRootDir());
+    setRootIndex(QFileSystemModel::index(dir.path(), 0));
+}
+
+QString FileSystemModel::getDefaultRootDir()
+{
+    return QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
+}