代理实现网格树控件QT实现完整代码
时间: 2024-03-27 19:40:43 浏览: 114
委托代理代码实现完整版本.rar
以下是使用Qt实现网格树控件的完整代码示例:
```cpp
// main.cpp
#include <QApplication>
#include "gridtreewidget.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
GridTreeWidget w;
w.show();
return a.exec();
}
```
```cpp
// gridtreewidget.h
#ifndef GRIDTREEWIDGET_H
#define GRIDTREEWIDGET_H
#include <QTreeWidget>
#include <QStyledItemDelegate>
class GridDelegate : public QStyledItemDelegate
{
public:
GridDelegate(QObject *parent = nullptr);
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
void setEditorData(QWidget *editor, const QModelIndex &index) const override;
void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const override;
QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
};
class GridTreeWidget : public QTreeWidget
{
Q_OBJECT
public:
GridTreeWidget(QWidget *parent = nullptr);
private:
void setupTree();
private:
GridDelegate *m_delegate;
};
#endif // GRIDTREEWIDGET_H
```
```cpp
// gridtreewidget.cpp
#include "gridtreewidget.h"
#include <QGridLayout>
#include <QHeaderView>
GridDelegate::GridDelegate(QObject *parent)
: QStyledItemDelegate(parent)
{
}
QWidget *GridDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
Q_UNUSED(option);
Q_UNUSED(index);
// 创建一个文本框作为编辑器
QLineEdit *editor = new QLineEdit(parent);
return editor;
}
void GridDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
// 获取节点的数据,并将其设置为编辑器的文本
QString text = index.model()->data(index, Qt::EditRole).toString();
QLineEdit *line = static_cast<QLineEdit*>(editor);
line->setText(text);
}
void GridDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
// 获取编辑器的文本,并将其设置为节点的数据
QLineEdit *line = static_cast<QLineEdit*>(editor);
QString text = line->text();
model->setData(index, text, Qt::EditRole);
}
QSize GridDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
// 设置网格单元的大小
return QSize(100, 30);
}
void GridDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
// 更新编辑器的位置和大小
QRect rect = option.rect;
editor->setGeometry(rect);
}
GridTreeWidget::GridTreeWidget(QWidget *parent)
: QTreeWidget(parent)
{
// 设置树形控件的列数和行高
setColumnCount(5);
setHeaderHidden(true);
setUniformRowHeights(true);
// 设置代理类
m_delegate = new GridDelegate(this);
setItemDelegate(m_delegate);
// 初始化树形控件
setupTree();
}
void GridTreeWidget::setupTree()
{
// 创建根节点
QTreeWidgetItem *root = new QTreeWidgetItem(this, QStringList() << "Root");
addTopLevelItem(root);
// 创建子节点和网格单元
for (int i = 0; i < 5; ++i) {
QTreeWidgetItem *item = new QTreeWidgetItem(root, QStringList() << QString("Item %1").arg(i));
for (int j = 0; j < 5; ++j) {
QWidget *widget = new QWidget(this);
QGridLayout *layout = new QGridLayout(widget);
layout->addWidget(new QLabel(QString("Data %1").arg(j)), 0, 0);
layout->addWidget(new QLabel(QString("Data %1").arg(j)), 0, 1);
layout->addWidget(new QLabel(QString("Data %1").arg(j)), 1, 0);
layout->addWidget(new QLabel(QString("Data %1").arg(j)), 1, 1);
setItemWidget(item, j, widget);
}
}
// 调整列宽和行高
header()->setSectionResizeMode(QHeaderView::ResizeToContents);
resizeColumnToContents(0);
resizeColumnToContents(1);
resizeColumnToContents(2);
resizeColumnToContents(3);
resizeColumnToContents(4);
}
```
在以上代码中,我们创建了一个自定义的树形控件`GridTreeWidget`,并使用`GridDelegate`代理类来实现网格树的显示和编辑。在`GridDelegate`中,我们实现了`createEditor()`、`setEditorData()`、`setModelData()`、`sizeHint()`和`updateEditorGeometry()`等方法,用于创建编辑器、设置编辑器的数据、将编辑器的数据设置为节点的数据、设置网格单元的大小和位置等。在`GridTreeWidget`中,我们使用`QGridLayout`来创建网格单元,并使用`setItemWidget()`方法将其添加到树形控件中。最后,我们调整了树形控件的列宽和行高,以便显示网格树的所有内容。
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