我有一个我的类列表(蓝色的),它有一个绿色类的列表,到目前为止我的C ++结构很好,我可以从qml中获取数据,反之亦然,但我是不知道如何使GUI工作正确,我有嵌套的ListViews triede,但似乎我无法从内部ListView访问外部ListView模型..
我是qml的新手,昨天我发现了TreeView,但对我而言,如果你有一个表结构,它看起来很有用。是否有一些我不知道的qml可以帮助我解决这个问题?
我已尝试使用嵌套的ListViews,这个想法是内部ListView将绿色类的对象作为模型。
ListView {
id: userView
anchors.fill: parent
model: myModel
delegate: Rectangle {
width: 900
height: 200
Column {
id: col
anchors.left: parent.left
anchors.right: parent.right
Item { height: 10 }
Text {
text: model.type + " " + model.name
}
Row {
spacing: 8
Button {
id: addLevel
width: 80
text: "Add Level"
enabled: setVisible
elevation: 1
backgroundColor: Theme.primaryColor
onClicked: {
myModel.insertLevel(index)
}
}
Button {
id: delTariff
width: 80
text: "Delete User"
enabled: setVisible
elevation: 1
backgroundColor: Theme.primaryColor
onClicked: {
myModel.removeTariff(index)
}
}
Button {
id: delLevel
width: 80
text: "Delete Level"
enabled: setVisible
elevation: 1
backgroundColor: Theme.primaryColor
onClicked: {
myModel.removeLevel(index, 0)
}
}
}
Text {
text: model.levels
}
Row {
spacing: 8
Repeater {
model: myModel.levelStructModel(userView.index)
Rectangle {
height: 30
width: 30
color: "blue"
}
}
}
}
}
添加或删除内容后我也遇到程序问题,我尝试在myModel的构造函数中添加QQmlEngine::setObjectOwnership(this, QQmlEngine::CppOwnership)
,但没有任何运气。
答案 0 :(得分:3)
经过一些搜索,以及Qt论坛上一个好人的帮助,谁为我发布了这个。
SomeModel.h 的
class SomeModel : public QAbstractListModel
{
Q_OBJECT
public:
enum SomeModelRoles{
SOMETEXT = Qt::UserRole+1,
SUBMODEL
};
//....
// QAbstractItemModel interface
public:
int rowCount(const QModelIndex &parent) const;
QVariant data(const QModelIndex &index, int role) const;
QHash<int, QByteArray> roleNames() const;
protected:
QVector<SubModel*> m_models;
QHash<int, QByteArray> m_roles;
};
SomeModel.cpp 的
QVariant SomeModel::data(const QModelIndex &index, int role) const
{
if(!index.isValid())
return QVariant();
if(role == SOMETEXT)
return m_models.at(index.row())->someText();
else if(role == SUBMODEL)
return QVariant::fromValue(m_models.at(index.row()));
return QVariant();
}
SubModel.h 的
class SubModel : public QAbstractListModel
{
//...
Q_PROPERTY(QString someText READ someText WRITE setSomeText NOTIFY someTextChanged)
public:
enum SubModelRoles{
COLOR = Qt::UserRole+1
};
//...
// QAbstractItemModel interface
public:
int rowCount(const QModelIndex &parent) const;
QVariant data(const QModelIndex &index, int role) const;
QHash<int, QByteArray> roleNames() const;
protected:
QHash<int, QByteArray> m_roles;
QVector<SomeItem*> m_items;
QString m_text;
};
SubModel.cpp 的
QVariant SubModel::data(const QModelIndex &index, int role) const
{
if(!index.isValid())
return QVariant();
if(role == COLOR)
return m_items.at(index.row())->color();
return QVariant();
}
listModel.qml 的
ListView {
model: someModel // model from C++
spacing: 10
delegate: Component{
Rectangle {
width: 200
height: col.height
Column{
id: col
anchors.left: parent.left
anchors.top: parent.top
height: list.count*20 + header.height + buttonsRow.height
width: parent.width
Text{
id: header
width: parent.width
height: 40
text: someText
}
Row{
id: buttonsRow
anchors.horizontalCenter: parent.horizontalCenter
Button{
id: btnAdd
text: qsTr("Add")
}
Button{
id: btnDelete
text: qsTr("Delete")
}
}
ListView {
id: list
model: subModel
width: 0.7*parent.width
height: count*20
anchors.horizontalCenter: parent.horizontalCenter
delegate: Rectangle {
width: ListView.view.width
height: 20
color: itemColor
border.color: "gray"
border.width: 1
MouseArea{
anchors.fill: parent
onClicked: console.log(parent.color)
}
}
}
}
}
}
}
原来我的C ++代码不如我想象的那么好,所以通过返回一个知道QAbstractList模型的指针,我可以在我的嵌套ListView中使用它。
信用:https://forum.qt.io/topic/68707/qt-nested-listview-or-can-i-use-treeview/3