summaryrefslogtreecommitdiffstats
path: root/examples/widgets/itemviews/fetchmore
diff options
context:
space:
mode:
Diffstat (limited to 'examples/widgets/itemviews/fetchmore')
-rw-r--r--examples/widgets/itemviews/fetchmore/CMakeLists.txt2
-rw-r--r--examples/widgets/itemviews/fetchmore/filelistmodel.cpp53
-rw-r--r--examples/widgets/itemviews/fetchmore/filelistmodel.h13
-rw-r--r--examples/widgets/itemviews/fetchmore/window.cpp48
-rw-r--r--examples/widgets/itemviews/fetchmore/window.h13
5 files changed, 80 insertions, 49 deletions
diff --git a/examples/widgets/itemviews/fetchmore/CMakeLists.txt b/examples/widgets/itemviews/fetchmore/CMakeLists.txt
index 35ddc52aab..ffc45b8339 100644
--- a/examples/widgets/itemviews/fetchmore/CMakeLists.txt
+++ b/examples/widgets/itemviews/fetchmore/CMakeLists.txt
@@ -1,6 +1,6 @@
# Generated from fetchmore.pro.
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.16)
project(fetchmore LANGUAGES CXX)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
diff --git a/examples/widgets/itemviews/fetchmore/filelistmodel.cpp b/examples/widgets/itemviews/fetchmore/filelistmodel.cpp
index 3ee80617c0..5c93aba6f4 100644
--- a/examples/widgets/itemviews/fetchmore/filelistmodel.cpp
+++ b/examples/widgets/itemviews/fetchmore/filelistmodel.cpp
@@ -54,8 +54,10 @@
#include <QDir>
#include <QPalette>
+static const int batchSize = 100;
+
FileListModel::FileListModel(QObject *parent)
- : QAbstractListModel(parent), fileCount(0)
+ : QAbstractListModel(parent)
{}
//![4]
@@ -67,24 +69,33 @@ int FileListModel::rowCount(const QModelIndex &parent) const
QVariant FileListModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
- return QVariant();
-
- if (index.row() >= fileList.size() || index.row() < 0)
- return QVariant();
-
- if (role == Qt::DisplayRole) {
- return fileList.at(index.row());
- } else if (role == Qt::BackgroundRole) {
- int batch = (index.row() / 100) % 2;
- if (batch == 0)
- return qApp->palette().base();
- else
- return qApp->palette().alternateBase();
+ return {};
+
+ const int row = index.row();
+ if (row >= fileList.size() || row < 0)
+ return {};
+
+ switch (role) {
+ case Qt::DisplayRole:
+ return fileList.at(row).fileName();
+ case Qt::BackgroundRole: {
+ const int batch = row / batchSize;
+ const QPalette &palette = QGuiApplication::palette();
+ return (batch % 2) != 0 ? palette.alternateBase() : palette.base();
+ }
+ case Qt::DecorationRole:
+ return iconProvider.icon(fileList.at(row));
}
- return QVariant();
+ return {};
}
+
//![4]
+QFileInfo FileListModel::fileInfoAt(const QModelIndex &index) const
+{
+ return fileList.at(index.row());
+}
+
//![1]
bool FileListModel::canFetchMore(const QModelIndex &parent) const
{
@@ -99,19 +110,20 @@ void FileListModel::fetchMore(const QModelIndex &parent)
{
if (parent.isValid())
return;
- int remainder = fileList.size() - fileCount;
- int itemsToFetch = qMin(100, remainder);
+ const int start = fileCount;
+ const int remainder = int(fileList.size()) - start;
+ const int itemsToFetch = qMin(batchSize, remainder);
if (itemsToFetch <= 0)
return;
- beginInsertRows(QModelIndex(), fileCount, fileCount + itemsToFetch - 1);
+ beginInsertRows(QModelIndex(), start, start + itemsToFetch - 1);
fileCount += itemsToFetch;
endInsertRows();
- emit numberPopulated(itemsToFetch);
+ emit numberPopulated(path, start, itemsToFetch, int(fileList.size()));
}
//![2]
@@ -121,7 +133,8 @@ void FileListModel::setDirPath(const QString &path)
QDir dir(path);
beginResetModel();
- fileList = dir.entryList();
+ this->path = path;
+ fileList = dir.entryInfoList(QDir::NoDot | QDir::AllEntries, QDir::Name);
fileCount = 0;
endResetModel();
}
diff --git a/examples/widgets/itemviews/fetchmore/filelistmodel.h b/examples/widgets/itemviews/fetchmore/filelistmodel.h
index 35cf6f7b46..1cd61f8c8e 100644
--- a/examples/widgets/itemviews/fetchmore/filelistmodel.h
+++ b/examples/widgets/itemviews/fetchmore/filelistmodel.h
@@ -52,7 +52,8 @@
#define FILELISTMODEL_H
#include <QAbstractListModel>
-#include <QStringList>
+#include <QFileInfoList>
+#include <QFileIconProvider>
//![0]
class FileListModel : public QAbstractListModel
@@ -65,8 +66,10 @@ public:
int rowCount(const QModelIndex &parent = QModelIndex()) const override;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+ QFileInfo fileInfoAt(const QModelIndex &) const;
+
signals:
- void numberPopulated(int number);
+ void numberPopulated(const QString &path, int start, int number, int total);
public slots:
void setDirPath(const QString &path);
@@ -76,8 +79,10 @@ protected:
void fetchMore(const QModelIndex &parent) override;
private:
- QStringList fileList;
- int fileCount;
+ QFileInfoList fileList;
+ QString path;
+ QFileIconProvider iconProvider;
+ int fileCount = 0;
};
//![0]
diff --git a/examples/widgets/itemviews/fetchmore/window.cpp b/examples/widgets/itemviews/fetchmore/window.cpp
index fa23bddc73..64746c18f8 100644
--- a/examples/widgets/itemviews/fetchmore/window.cpp
+++ b/examples/widgets/itemviews/fetchmore/window.cpp
@@ -56,37 +56,43 @@
Window::Window(QWidget *parent)
: QWidget(parent)
{
- FileListModel *model = new FileListModel(this);
- model->setDirPath(QLibraryInfo::path(QLibraryInfo::PrefixPath));
+ model = new FileListModel(this);
+ model->setDirPath(QDir::rootPath());
- QLabel *label = new QLabel(tr("&Directory:"));
- QLineEdit *lineEdit = new QLineEdit;
- label->setBuddy(lineEdit);
-
- QListView *view = new QListView;
+ view = new QListView;
view->setModel(model);
- logViewer = new QTextBrowser(this);
- logViewer->setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred));
+ logViewer = new QPlainTextEdit(this);
+ logViewer->setReadOnly(true);
+ logViewer->setSizePolicy(QSizePolicy(QSizePolicy::Preferred,
+ QSizePolicy::Preferred));
- connect(lineEdit, &QLineEdit::textChanged,
- model, &FileListModel::setDirPath);
- connect(lineEdit, &QLineEdit::textChanged,
- logViewer, &QTextEdit::clear);
connect(model, &FileListModel::numberPopulated,
this, &Window::updateLog);
+ connect(view, &QAbstractItemView::activated,
+ this, &Window::activated);
- QGridLayout *layout = new QGridLayout;
- layout->addWidget(label, 0, 0);
- layout->addWidget(lineEdit, 0, 1);
- layout->addWidget(view, 1, 0, 1, 2);
- layout->addWidget(logViewer, 2, 0, 1, 2);
+ auto *layout = new QVBoxLayout(this);
+ layout->addWidget(view);
+ layout->addWidget(logViewer);
- setLayout(layout);
setWindowTitle(tr("Fetch More Example"));
}
-void Window::updateLog(int number)
+void Window::updateLog(const QString &path, int start, int number, int total)
+{
+ const int last = start + number - 1;
+ const QString nativePath = QDir::toNativeSeparators(path);
+ const QString message = tr("%1..%2/%3 items from \"%4\" added.")
+ .arg(start).arg(last).arg(total).arg(nativePath);
+ logViewer->appendPlainText(message);
+}
+
+void Window::activated(const QModelIndex &index)
{
- logViewer->append(tr("%1 items added.").arg(number));
+ const QFileInfo fi = model->fileInfoAt(index);
+ if (fi.isDir()) {
+ logViewer->clear();
+ model->setDirPath(fi.absoluteFilePath());
+ }
}
diff --git a/examples/widgets/itemviews/fetchmore/window.h b/examples/widgets/itemviews/fetchmore/window.h
index 61bcb94bde..1f7c2a8728 100644
--- a/examples/widgets/itemviews/fetchmore/window.h
+++ b/examples/widgets/itemviews/fetchmore/window.h
@@ -54,9 +54,13 @@
#include <QWidget>
QT_BEGIN_NAMESPACE
-class QTextBrowser;
+class QModelIndex;
+class QListView;
+class QPlainTextEdit;
QT_END_NAMESPACE
+class FileListModel;
+
class Window : public QWidget
{
Q_OBJECT
@@ -65,10 +69,13 @@ public:
Window(QWidget *parent = nullptr);
public slots:
- void updateLog(int number);
+ void updateLog(const QString &path, int start, int number, int total);
+ void activated(const QModelIndex &);
private:
- QTextBrowser *logViewer;
+ QPlainTextEdit *logViewer;
+ FileListModel *model;
+ QListView *view;
};
#endif // WINDOW_H