New combo box with a list of checkable items

This commit is contained in:
Bill Somerville 2020-11-03 20:28:29 +00:00
parent f9aa10f3a5
commit 4e0e23c301
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GPG Key ID: D864B06D1E81618F
4 changed files with 135 additions and 2 deletions

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@ -241,6 +241,7 @@ set (wsjt_qt_CXXSRCS
logbook/Multiplier.cpp
Network/NetworkAccessManager.cpp
widgets/LazyFillComboBox.cpp
widgets/CheckableItemComboBox.cpp
)
set (wsjt_qtmm_CXXSRCS

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@ -0,0 +1,93 @@
#include "CheckableItemComboBox.hpp"
#include <QStyledItemDelegate>
#include <QStandardItemModel>
#include <QStandardItem>
#include <QLineEdit>
#include <QEvent>
#include <QListView>
class CheckableItemComboBoxStyledItemDelegate
: public QStyledItemDelegate
{
public:
explicit CheckableItemComboBoxStyledItemDelegate (QObject * parent = nullptr)
: QStyledItemDelegate {parent}
{
}
void paint (QPainter * painter, QStyleOptionViewItem const& option, QModelIndex const& index) const override
{
QStyleOptionViewItem& mutable_option = const_cast<QStyleOptionViewItem&> (option);
mutable_option.showDecorationSelected = false;
QStyledItemDelegate::paint (painter, mutable_option, index);
}
};
CheckableItemComboBox::CheckableItemComboBox (QWidget * parent)
: QComboBox {parent}
, model_ {new QStandardItemModel()}
{
setModel (model_.data ());
setEditable (true);
lineEdit ()->setReadOnly (true);
lineEdit ()->installEventFilter (this);
setItemDelegate (new CheckableItemComboBoxStyledItemDelegate {this});
connect (lineEdit(), &QLineEdit::selectionChanged, lineEdit(), &QLineEdit::deselect);
connect (static_cast<QListView *> (view ()), &QListView::pressed, this, &CheckableItemComboBox::item_pressed);
connect (model_.data (), &QStandardItemModel::dataChanged, this, &CheckableItemComboBox::model_data_changed);
}
QStandardItem * CheckableItemComboBox::addCheckItem (QString const& label, QVariant const& data
, Qt::CheckState checkState)
{
auto * item = new QStandardItem {label};
item->setCheckState (checkState);
item->setData (data);
item->setFlags (Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
model_->appendRow (item);
update_text ();
return item;
}
bool CheckableItemComboBox::eventFilter (QObject * object, QEvent * event)
{
if (object == lineEdit() && event->type () == QEvent::MouseButtonPress)
{
showPopup();
return true;
}
return false;
}
void CheckableItemComboBox::update_text()
{
QString text;
for (int i = 0; i < model_->rowCount (); ++i)
{
if (model_->item (i)->checkState () == Qt::Checked)
{
if (text.size ())
{
text+= ", ";
}
text += model_->item (i)->data ().toString ();
}
}
lineEdit ()->setText (text);
}
void CheckableItemComboBox::model_data_changed ()
{
update_text ();
}
void CheckableItemComboBox::item_pressed (QModelIndex const& index)
{
QStandardItem * item = model_->itemFromIndex (index);
item->setCheckState (item->checkState () == Qt::Checked ? Qt::Unchecked : Qt::Checked);
}
#include "widgets/moc_CheckableItemComboBox.cpp"

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@ -0,0 +1,36 @@
#ifndef CHECKABLE_ITEM_COMBO_BOX_HPP__
#define CHECKABLE_ITEM_COMBO_BOX_HPP__
#include <QComboBox>
#include <QScopedPointer>
class QStandardItemModel;
class QStandardItem;
/**
* @brief QComboBox with support of checkboxes
* http://stackoverflow.com/questions/8422760/combobox-of-checkboxes
*/
class CheckableItemComboBox
: public QComboBox
{
Q_OBJECT
public:
explicit CheckableItemComboBox (QWidget * parent = nullptr);
QStandardItem * addCheckItem (QString const& label, QVariant const& data, Qt::CheckState checkState);
protected:
bool eventFilter (QObject *, QEvent *) override;
private:
void update_text();
Q_SLOT void model_data_changed ();
Q_SLOT void item_pressed (QModelIndex const&);
private:
QScopedPointer<QStandardItemModel> model_;
};
#endif

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@ -10,7 +10,9 @@ SOURCES += \
widgets/AbstractLogWindow.cpp \
widgets/FrequencyLineEdit.cpp widgets/FrequencyDeltaLineEdit.cpp \
widgets/FoxLogWindow.cpp widgets/CabrilloLogWindow.cpp \
widgets/HelpTextWindow.cpp widgets/RestrictedSpinBox.cpp
widgets/HelpTextWindow.cpp widgets/RestrictedSpinBox.cpp \
widgets/LazyFillComboBox.cpp widgets/CheckableItemComboBox.cpp
HEADERS += \
widgets/mainwindow.h widgets/plotter.h \
widgets/about.h widgets/widegraph.h \
@ -22,7 +24,8 @@ HEADERS += \
widgets/ExportCabrillo.h widgets/AbstractLogWindow.hpp \
widgets/FoxLogWindow.hpp widgets/CabrilloLogWindow.hpp \
widgets/DateTimeEdit.hpp widgets/HelpTextWindow.hpp \
widgets/RestrictedSpinBox.hpp
widgets/RestrictedSpinBox.hpp \
widgets/LazyFillComboBox.hpp widgets/CheckableItemComboBox.hpp
FORMS += \
widgets/mainwindow.ui widgets/about.ui \