Qt 学习之路2（46）视图和委托---代码实现

叁歲伎倆 2022-11-19 04:12 93阅读 0赞

代码：  \#ifndef WIDGET\_H \#define WIDGET\_H \#include <qwidget> class QStringListModel; class QListView; namespace Ui \{ class Widget; \} class Widget : public QWidget \{ Q\_OBJECT public: explicit Widget(QWidget \*parent = 0); ~Widget(); private: Ui::Widget \*ui; QStringListModel \*model; QListView \*listView; \}; \#endif // WIDGET\_H \#ifndef SPINBOXDELEGATE\_H \#define SPINBOXDELEGATE\_H \#include <qstyleditemdelegate> \#include <qmodelindex> \#include <qstyleoptionviewitem> class SpinBoxDelegate : public QStyledItemDelegate \{ Q\_OBJECT public: SpinBoxDelegate(QObject \*parent = 0) : QStyledItemDelegate(parent) \{\} QWidget \*createEditor(QWidget \*parent, const QStyleOptionViewItem &option, const QModelIndex &index) const; void setEditorData(QWidget \*editor, const QModelIndex &index) const; void setModelData(QWidget \*editor, QAbstractItemModel \*model, const QModelIndex &index) const; void updateEditorGeometry(QWidget \*editor, const QStyleOptionViewItem &option, const QModelIndex &index) const; \}; \#endif // SPINBOXDELEGATE\_H \#include "widget.h" \#include "ui\_widget.h" \#include <qpushbutton> \#include <qhboxlayout> \#include <qvboxlayout> \#include <qstringlist> \#include <qpushbutton> \#include <qhboxlayout> \#include <qstringlistmodel> \#include <qlistview> \#include <qdebug> \#include "SpinBoxDelegate.h" Widget::Widget(QWidget \*parent) : QWidget(parent), ui(new Ui::Widget) \{ QStringList data1; data1 << "0" << "1" << "2"; model = new QStringListModel(this); model->setStringList(data1); listView = new QListView(this); listView->setModel(model); listView->setItemDelegate(new SpinBoxDelegate(listView)); qDebug() <<listview->selectionModel(); QPushButton \*btnShow = new QPushButton(("Show Model"), this); connect(btnShow, SIGNAL(clicked()), this, SLOT(showModel())); QHBoxLayout \*buttonLayout = new QHBoxLayout; buttonLayout->addWidget(btnShow); QVBoxLayout \*layout = new QVBoxLayout; layout->addWidget(listView); layout->addLayout(buttonLayout); setLayout(layout); ui->setupUi(this); \} Widget::~Widget() \{ delete ui; \} \#include "SpinBoxDelegate.h" \#include <qspinbox> QWidget \*SpinBoxDelegate::createEditor(QWidget \*parent, const QStyleOptionViewItem & /\* option \*/, const QModelIndex & /\* index \*/) const \{ QSpinBox \*editor = new QSpinBox(parent); editor->setMinimum(0); editor->setMaximum(100); return editor; \} void SpinBoxDelegate::setEditorData(QWidget \*editor, const QModelIndex &index) const \{ int value = index.model()->data(index, Qt::EditRole).toInt(); QSpinBox \*spinBox = static\_cast<qspinbox>(editor); spinBox->setValue(value); \} void SpinBoxDelegate::setModelData(QWidget \*editor, QAbstractItemModel \*model, const QModelIndex &index) const \{ QSpinBox \*spinBox = static\_cast<qspinbox>(editor); spinBox->interpretText(); int value = spinBox->value(); model->setData(index, value, Qt::EditRole); \} void SpinBoxDelegate::updateEditorGeometry(QWidget \*editor, const QStyleOptionViewItem &option, const QModelIndex &index) const \{ editor->setGeometry(option.rect); \} \#include "widget.h" \#include <qapplication> int main(int argc, char \*argv\[\]) \{ QApplication a(argc, argv); Widget w; w.show(); return a.exec(); \} </qapplication></qspinbox></qspinbox></qspinbox></listview-></qdebug></qlistview></qstringlistmodel></qhboxlayout></qpushbutton></qstringlist></qvboxlayout></qhboxlayout></qpushbutton></qstyleoptionviewitem></qmodelindex></qstyleditemdelegate></qwidget>