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-rw-r--r--examples/widgets/richtext/textedit/textedit.cpp227
-rw-r--r--examples/widgets/richtext/textedit/textedit.h13
2 files changed, 149 insertions, 91 deletions
diff --git a/examples/widgets/richtext/textedit/textedit.cpp b/examples/widgets/richtext/textedit/textedit.cpp
index 51a8f54bd5..5f9e8d87b7 100644
--- a/examples/widgets/richtext/textedit/textedit.cpp
+++ b/examples/widgets/richtext/textedit/textedit.cpp
@@ -21,6 +21,7 @@
#include <QTextCursor>
#include <QTextDocumentWriter>
#include <QTextList>
+#include <QTimer>
#include <QtDebug>
#include <QCloseEvent>
#include <QMessageBox>
@@ -119,10 +120,13 @@ TextEdit::TextEdit(QWidget *parent)
//! [closeevent]
void TextEdit::closeEvent(QCloseEvent *e)
{
- if (maybeSave())
+ if (closeAccepted) {
e->accept();
- else
- e->ignore();
+ return;
+ }
+
+ e->ignore();
+ maybeSave(SaveContinuation::Close);
}
//! [closeevent]
@@ -145,12 +149,13 @@ void TextEdit::setupFileActions()
menu->addSeparator();
const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(rsrcPath + "/filesave.png"));
- actionSave = menu->addAction(saveIcon, tr("&Save"), this, &TextEdit::fileSave);
+ actionSave = menu->addAction(saveIcon, tr("&Save"), this,
+ [this]() { fileSave(SaveContinuation::None); });
actionSave->setShortcut(QKeySequence::Save);
actionSave->setEnabled(false);
tb->addAction(actionSave);
- a = menu->addAction(tr("Save &As..."), this, &TextEdit::fileSaveAs);
+ a = menu->addAction(tr("Save &As..."), this, [this]() { fileSaveAs(SaveContinuation::None); });
a->setPriority(QAction::LowPriority);
menu->addSeparator();
@@ -398,21 +403,31 @@ bool TextEdit::load(const QString &f)
return true;
}
-bool TextEdit::maybeSave()
+void TextEdit::maybeSave(SaveContinuation continuation)
{
- if (!textEdit->document()->isModified())
- return true;
+ if (!textEdit->document()->isModified()) {
+ // Execute continuation as soon as control has returned to the event loop so that existing
+ // dialogs do not get in the way of closing the window.
+ QTimer::singleShot(0, [this, continuation]() { fileSaveComplete(continuation); });
+ return;
+ }
- const QMessageBox::StandardButton ret =
- QMessageBox::warning(this, QCoreApplication::applicationName(),
- tr("The document has been modified.\n"
- "Do you want to save your changes?"),
- QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
- if (ret == QMessageBox::Save)
- return fileSave();
- if (ret == QMessageBox::Cancel)
- return false;
- return true;
+ QMessageBox *msgBox =
+ new QMessageBox(QMessageBox::Icon::Warning, QCoreApplication::applicationName(),
+ tr("The document has been modified.\n"
+ "Do you want to save your changes?"),
+ QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel, this);
+
+ connect(msgBox, &QMessageBox::finished, [=](int result) {
+ if (result == QMessageBox::Save) {
+ fileSave(continuation);
+ return;
+ }
+ fileSaveComplete(result == QMessageBox::Discard ? continuation : SaveContinuation::None);
+ });
+
+ msgBox->setAttribute(Qt::WA_DeleteOnClose);
+ msgBox->open();
}
void TextEdit::setCurrentFileName(const QString &fileName)
@@ -432,18 +447,15 @@ void TextEdit::setCurrentFileName(const QString &fileName)
void TextEdit::fileNew()
{
- if (maybeSave()) {
- textEdit->clear();
- setCurrentFileName({});
- }
+ maybeSave(SaveContinuation::Clear);
}
void TextEdit::fileOpen()
{
- QFileDialog fileDialog(this, tr("Open File..."));
- fileDialog.setAcceptMode(QFileDialog::AcceptOpen);
- fileDialog.setFileMode(QFileDialog::ExistingFile);
- fileDialog.setMimeTypeFilters({
+ QFileDialog *fileDialog = new QFileDialog(this, tr("Open File..."));
+ fileDialog->setAcceptMode(QFileDialog::AcceptOpen);
+ fileDialog->setFileMode(QFileDialog::ExistingFile);
+ fileDialog->setMimeTypeFilters({
#if QT_CONFIG(texthtmlparser)
"text/html",
#endif
@@ -452,19 +464,20 @@ void TextEdit::fileOpen()
"text/markdown",
#endif
"text/plain"});
- if (fileDialog.exec() != QDialog::Accepted)
- return;
- const QString fn = fileDialog.selectedFiles().constFirst();
- if (load(fn))
- statusBar()->showMessage(tr("Opened \"%1\"").arg(QDir::toNativeSeparators(fn)));
- else
- statusBar()->showMessage(tr("Could not open \"%1\"").arg(QDir::toNativeSeparators(fn)));
+
+ connect(fileDialog, &QFileDialog::fileSelected, [=](const QString &file) {
+ statusBar()->showMessage(
+ load(file) ? tr(R"(Opened "%1")").arg(QDir::toNativeSeparators(file))
+ : tr(R"(Could not open "%1")").arg(QDir::toNativeSeparators(file)));
+ });
+ fileDialog->setAttribute(Qt::WA_DeleteOnClose);
+ fileDialog->open();
}
-bool TextEdit::fileSave()
+void TextEdit::fileSave(SaveContinuation continuation)
{
if (fileName.isEmpty() || fileName.startsWith(u":/"))
- return fileSaveAs();
+ return fileSaveAs(continuation);
QTextDocumentWriter writer(fileName);
bool success = writer.write(textEdit->document());
@@ -475,13 +488,13 @@ bool TextEdit::fileSave()
statusBar()->showMessage(tr("Could not write to file \"%1\"")
.arg(QDir::toNativeSeparators(fileName)));
}
- return success;
+ fileSaveComplete(success ? continuation : SaveContinuation::None);
}
-bool TextEdit::fileSaveAs()
+void TextEdit::fileSaveAs(SaveContinuation continuation)
{
- QFileDialog fileDialog(this, tr("Save as..."));
- fileDialog.setAcceptMode(QFileDialog::AcceptSave);
+ QFileDialog *fileDialog = new QFileDialog(this, tr("Save as..."));
+ fileDialog->setAcceptMode(QFileDialog::AcceptSave);
QStringList mimeTypes{"text/plain",
#if QT_CONFIG(textodfwriter)
"application/vnd.oasis.opendocument.text",
@@ -490,58 +503,82 @@ bool TextEdit::fileSaveAs()
"text/markdown",
#endif
"text/html"};
- fileDialog.setMimeTypeFilters(mimeTypes);
+ fileDialog->setMimeTypeFilters(mimeTypes);
#if QT_CONFIG(textodfwriter)
- fileDialog.setDefaultSuffix("odt");
+ fileDialog->setDefaultSuffix("odt");
#endif
- if (fileDialog.exec() != QDialog::Accepted)
- return false;
- const QString fn = fileDialog.selectedFiles().constFirst();
- setCurrentFileName(fn);
- return fileSave();
+ connect(fileDialog, &QFileDialog::finished, [this, continuation, fileDialog](int result) {
+ if (result != QDialog::Accepted)
+ return;
+ setCurrentFileName(fileDialog->selectedFiles().constFirst());
+ fileSave(continuation);
+ });
+ fileDialog->setAttribute(Qt::WA_DeleteOnClose);
+ fileDialog->open();
+}
+
+void TextEdit::fileSaveComplete(SaveContinuation continuation)
+{
+ switch (continuation) {
+ case SaveContinuation::Clear:
+ textEdit->clear();
+ setCurrentFileName({});
+ return;
+ case SaveContinuation::Close:
+ closeAccepted = true;
+ close();
+ return;
+ case SaveContinuation::None:
+ // NOOP as promised
+ return;
+ }
}
void TextEdit::filePrint()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog)
- QPrinter printer(QPrinter::HighResolution);
- QPrintDialog dlg(&printer, this);
+ auto printer = std::make_shared<QPrinter>(QPrinter::HighResolution);
+ QPrintDialog *dlg = new QPrintDialog(printer.get(), this);
if (textEdit->textCursor().hasSelection())
- dlg.setOption(QAbstractPrintDialog::PrintSelection);
- dlg.setWindowTitle(tr("Print Document"));
- if (dlg.exec() == QDialog::Accepted)
- textEdit->print(&printer);
+ dlg->setOption(QAbstractPrintDialog::PrintSelection);
+ dlg->setWindowTitle(tr("Print Document"));
+ dlg->setAttribute(Qt::WA_DeleteOnClose);
+ connect(dlg, qOverload<QPrinter *>(&QPrintDialog::accepted),
+ [this](QPrinter *printer) { textEdit->print(printer); });
+ connect(dlg, &QPrintDialog::finished, [printer]() mutable { printer.reset(); });
+ dlg->open();
#endif
}
void TextEdit::filePrintPreview()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printpreviewdialog)
- QPrinter printer(QPrinter::HighResolution);
- QPrintPreviewDialog preview(&printer, this);
- connect(&preview, &QPrintPreviewDialog::paintRequested, textEdit, &QTextEdit::print);
- preview.exec();
+ auto printer = std::make_shared<QPrinter>(QPrinter::HighResolution);
+ QPrintPreviewDialog *preview = new QPrintPreviewDialog(printer.get(), this);
+ preview->setAttribute(Qt::WA_DeleteOnClose);
+ connect(preview, &QPrintPreviewDialog::paintRequested, textEdit, &QTextEdit::print);
+ connect(preview, &QPrintPreviewDialog::finished, [printer]() mutable { printer.reset(); });
+ preview->open();
#endif
}
void TextEdit::filePrintPdf()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
-//! [0]
- QFileDialog fileDialog(this, tr("Export PDF"));
- fileDialog.setAcceptMode(QFileDialog::AcceptSave);
- fileDialog.setMimeTypeFilters(QStringList("application/pdf"));
- fileDialog.setDefaultSuffix("pdf");
- if (fileDialog.exec() != QDialog::Accepted)
- return;
- QString pdfFileName = fileDialog.selectedFiles().constFirst();
- QPrinter printer(QPrinter::HighResolution);
- printer.setOutputFormat(QPrinter::PdfFormat);
- printer.setOutputFileName(pdfFileName);
- textEdit->document()->print(&printer);
- statusBar()->showMessage(tr("Exported \"%1\"")
- .arg(QDir::toNativeSeparators(pdfFileName)));
-//! [0]
+ QFileDialog *fileDialog = new QFileDialog(this, tr("Export PDF"));
+ fileDialog->setAcceptMode(QFileDialog::AcceptSave);
+ fileDialog->setMimeTypeFilters(QStringList("application/pdf"));
+ fileDialog->setDefaultSuffix("pdf");
+ fileDialog->setAttribute(Qt::WA_DeleteOnClose);
+ connect(fileDialog, &QFileDialog::fileSelected, [this](const QString &file) {
+ QPrinter printer(QPrinter::HighResolution);
+ printer.setOutputFormat(QPrinter::PdfFormat);
+ printer.setOutputFileName(file);
+ textEdit->document()->print(&printer);
+ statusBar()->showMessage(tr("Exported \"%1\"").arg(QDir::toNativeSeparators(file)));
+ });
+
+ fileDialog->open();
#endif
}
@@ -669,24 +706,34 @@ void TextEdit::textStyle(int styleIndex)
void TextEdit::textColor()
{
- QColor col = QColorDialog::getColor(textEdit->textColor(), this);
- if (!col.isValid())
- return;
- QTextCharFormat fmt;
- fmt.setForeground(col);
- mergeFormatOnWordOrSelection(fmt);
- colorChanged(col);
+ QColorDialog *dlg = new QColorDialog(this);
+ dlg->setCurrentColor(textEdit->textColor());
+ connect(dlg, &QColorDialog::colorSelected, [this](const QColor &color) {
+ if (!color.isValid())
+ return;
+ QTextCharFormat fmt;
+ fmt.setForeground(color);
+ mergeFormatOnWordOrSelection(fmt);
+ colorChanged(color);
+ });
+ dlg->setAttribute(Qt::WA_DeleteOnClose);
+ dlg->open();
}
void TextEdit::underlineColor()
{
- QColor col = QColorDialog::getColor(Qt::black, this);
- if (!col.isValid())
- return;
- QTextCharFormat fmt;
- fmt.setUnderlineColor(col);
- mergeFormatOnWordOrSelection(fmt);
- colorChanged(col);
+ QColorDialog *dlg = new QColorDialog(this);
+ dlg->setCurrentColor(textEdit->textColor());
+ connect(dlg, &QColorDialog::colorSelected, [this](const QColor &color) {
+ if (!color.isValid())
+ return;
+ QTextCharFormat fmt;
+ fmt.setUnderlineColor(color);
+ mergeFormatOnWordOrSelection(fmt);
+ colorChanged(color);
+ });
+ dlg->setAttribute(Qt::WA_DeleteOnClose);
+ dlg->open();
}
void TextEdit::textAlign(QAction *a)
@@ -809,9 +856,13 @@ void TextEdit::clipboardDataChanged()
void TextEdit::about()
{
- QMessageBox::about(this, tr("About"), tr("This example demonstrates Qt's "
- "rich text editing facilities in action, providing an example "
- "document for you to experiment with."));
+ QMessageBox *msgBox =
+ new QMessageBox(QMessageBox::Icon::Information, tr("About"),
+ tr("This example demonstrates Qt's rich text editing facilities in "
+ "action, providing an example document for you to experiment with."),
+ QMessageBox::NoButton, this);
+ msgBox->setAttribute(Qt::WA_DeleteOnClose);
+ msgBox->open();
}
void TextEdit::mergeFormatOnWordOrSelection(const QTextCharFormat &format)
diff --git a/examples/widgets/richtext/textedit/textedit.h b/examples/widgets/richtext/textedit/textedit.h
index 2184863edc..f0f4abb827 100644
--- a/examples/widgets/richtext/textedit/textedit.h
+++ b/examples/widgets/richtext/textedit/textedit.h
@@ -31,10 +31,11 @@ public slots:
protected:
void closeEvent(QCloseEvent *e) override;
+private:
+ enum class SaveContinuation { None, Close, Clear };
+
private slots:
void fileOpen();
- bool fileSave();
- bool fileSaveAs();
void filePrint();
void filePrintPreview();
void filePrintPdf();
@@ -62,7 +63,7 @@ private:
void setupFileActions();
void setupEditActions();
void setupTextActions();
- bool maybeSave();
+ void maybeSave(SaveContinuation saveContinuation);
void setCurrentFileName(const QString &fileName);
void modifyIndentation(int amount);
@@ -71,6 +72,10 @@ private:
void colorChanged(const QColor &c);
void alignmentChanged(Qt::Alignment a);
+ void fileSave(SaveContinuation continuation);
+ void fileSaveAs(SaveContinuation continuation);
+ void fileSaveComplete(SaveContinuation continuation);
+
QAction *actionSave;
QAction *actionTextBold;
QAction *actionTextUnderline;
@@ -98,6 +103,8 @@ private:
QString fileName;
QTextEdit *textEdit;
+
+ bool closeAccepted = false;
};
#endif // TEXTEDIT_H
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-22 09:01:01 +0000