基本上,我有一个使用QStringList填充的qml组合框。但是,我无法刷新组合框(重新加载)以显示列表已更改。我考虑使用Loader进行此操作,但无法弄清楚。有人可以指导我如何做。
network.qml
Popup{
contentItem: Rectangle{
LabelValueList {
id: list1
row1: LabelValue {
id: row1
row2: LabelValue {
id: row2
value: ComboBox {
id: combobox
model: ListModel {
id: comboModel
Component.onCompleted: {
//..
}
}
}
}
}
}
}
}
network.h
class Network : public QObject{
Q_OBJECT
Q_PROPERTY(QStringList listOfNetworks READ m_listOfNetworks NOTIFY updateNetworks)
private:
QStringList m_listOfNetworks;
public:
explicit Network(QObject *parent = 0);
QStringList listOfNetworks() const;
public slots:
void slot_scanNetworks();
signals:
void updateNetworks();
};
network.cpp
Network::Network(QObject *parent) : QObject (parent){
}
void Network::slot_scanNetworks(){
QFile SSIDsFile("/home/root/networking/listOfWifiNetworks.txt");
m_listOfNetworks.clear();
if (!SSIDsFile.open(QIODevice::ReadOnly | QIODevice::Text)){
//
}
else{
QTextStream scanNetworkStream(&SSIDsFile);
while (!scanNetworkStream.atEnd()){
QString line = scanNetworkStream.readLine();
if (line.size() != 0){
QStringList lineSplit = line.split(' ');
m_listOfNetworks.append(lineSplit[1]);
}
}
}
SSIDsFile.close();
emit updateNetworks();
}
如何重新加载row2的组合框以刷新列表?它只在开始时获得列表,但是当我发出信号updateNetworks()时,我想更新下拉列表(组合框)。我尝试使用Loader并将其source.Component设置为row2的ID,但始终收到错误“错误:无法将QObject *分配给QQmlComponent”。有帮助吗?
答案 0 :(得分:1)
我不是专业人士,但也许可以帮助您。 您可以在您的应用程序上使用计时器并将其设置为1以刷新它并创建一个变量,并在调用信号调用此变量时 例子:
// make a variable type of bool by value = false
property bool refreshMyBoxNow : false
//add this timer to ur project
Timer
{
id: timeToRefreshBox
//interval = time to tick . (1000) = 1sec
interval: 1; running: true; repeat: true
onTriggered:
{
//your code here for refresh box
}
}