【发布时间】:2022-01-15 16:53:39
【问题描述】:
我想在每个 QListView 单元格中显示自定义小部件(3 个标签宽度不同的字体和 2 个工具按钮)。 小部件必须处理鼠标事件才能正确处理悬停事件和按钮点击。 (因此我不能只在QStyledItemDelegate::paint() 中绘制它)。
主要思想: QAbstractItemView::openPersistentEditor().
#include <QApplication>
#include <QWidget>
#include <QHBoxLayout>
#include <QLabel>
#include <QToolButton>
#include <QVBoxLayout>
#include <QDateTime>
#include <QListView>
#include <QStringListModel>
#include <QStyledItemDelegate>
class Form : public QWidget
{
//Q_OBJECT
public:
explicit Form(QWidget *parent = nullptr)
:QWidget(parent)
{
verticalLayout = new QVBoxLayout(this);
horizontalLayout = new QHBoxLayout();
labelTitle = new QLabel(this);
labelTitle->setFont(QFont("Calibri", 12, QFont::Bold));
horizontalLayout->addWidget(labelTitle);
toolButtonEdit = new QToolButton(this);
toolButtonEdit->setText("E");
horizontalLayout->addWidget(toolButtonEdit);
toolButtonRemove = new QToolButton(this);
toolButtonRemove->setText("R");
horizontalLayout->addWidget(toolButtonRemove);
verticalLayout->addLayout(horizontalLayout);
labelDate = new QLabel(this);
labelDate->setFont(QFont("Calibri", 8));
verticalLayout->addWidget(labelDate);
labelText = new QLabel(this);
labelText->setFont(QFont("Calibri", 10));
verticalLayout->addWidget(labelText);
verticalLayout->setStretch(2, 1);
setMinimumSize(QSize(300, 50));
}
public:
QVBoxLayout *verticalLayout;
QHBoxLayout *horizontalLayout;
QLabel *labelTitle;
QToolButton *toolButtonEdit;
QToolButton *toolButtonRemove;
QLabel *labelDate;
QLabel *labelText;
};
class MyDelegate : public QStyledItemDelegate
{
public:
QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override
{
auto editor = new Form(parent);
return editor;
}
void setEditorData(QWidget *ed, const QModelIndex &index) const override
{
QVariant var = index.model()->data(index, Qt::DisplayRole);
if (Form *editor = dynamic_cast<Form*>(ed))
{
editor->labelTitle->setText("SYMBOL");
editor->labelDate->setText("date-time");
editor->labelText->setText(var.toString());
}
}
void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem& option, const QModelIndex &)const override
{
editor->setGeometry(option.rect);
}
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Form form(nullptr);
form.labelTitle->setText("TITLE");
form.labelDate->setText(QDateTime::currentDateTime().toString());
form.labelText->setText("text body");
form.show();
auto model = new QStringListModel;
model->setStringList(QStringList()
<< "text body 1"
<< "text body 2"
<< "text body 3");
auto view = new QListView(nullptr);
view->setModel(model);
view->setItemDelegate(new MyDelegate);
int rowCount = model->rowCount();
for (int row = 0; row < rowCount; ++row)
{
QModelIndex index = model->index(row, 0);
view->openPersistentEditor(index);
}
view->show();
return a.exec();
}
如何设置这样一个自定义小部件来显示视图单元格?
【问题讨论】:
-
你需要使用listView吗?相反,您能否使用 .ui 文件创建一个小部件,并为每个元素以编程方式实例化一个小部件并将其添加到垂直布局中?
-
@DaveK 不,我的数据在模型和代理模型中,我不能只避免模型/视图架构
标签: c++ qt qlistview qstyleditemdelegate