QLabel 没有提供更新的 txt
QLabel not giving updated txt
我在我的小部件中添加了一个 QLabel,它可以通过 UI 进行编辑,也可以设置新文本,但无法使用函数 text();
检索更新的文本
QLabel *m_ColorName = new QLabel("_________");
m_ColorName->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextEditable);
在 UI 中,我可以编辑新文本,但需要调用函数
m_ColorName->text();
它给出默认的 txt _________
代码
H档
class CascadeColorHighlightWidgetItem : public QWidget
{
Q_OBJECT
public:
CascadeColorHighlightWidgetItem(int jobID, QColor selectedColor, QWidget *parent = 0);
int getJobID();
QString getSelectedColor();
QString getColorText();
private:
QString m_titleName;
QRectF m_textRect;
QVBoxLayout *m_mainLyt;
QLineEdit *m_pTitleEditor;
QLabel *m_ColorName;
QColor m_SelectedColor;
};
源文件
CascadeColorHighlightWidgetItem::CascadeColorHighlightWidgetItem(QColor selectedColor, QWidget *parent)
: QWidget(parent),m_titleName("______"),m_SelectedColor(selectedColor)
{
setFixedHeight(40);
setContentsMargins(0,0,0,0);
setFocusPolicy(Qt::StrongFocus);
m_pTitleEditor = new QLineEdit();
m_ColorName = new QLabel("_________");
m_ColorName->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextEditable);
QFont font( "Calibri" );
font.setPixelSize(14);
m_ColorName->setFont(font);
QPixmap pixmap;
pixmap.fill(QColor("transparent"));
QWidget *pixMap = new QWidget;
pixMap->resize(100,100);
QString styl = QString("background-color: rgb(%1, %2, %3)").arg(QString::number(m_SelectedColor.red()),
QString::number(m_SelectedColor.green()),
QString::number(m_SelectedColor.blue()));
pixMap->setStyleSheet(styl);
m_ColorToStringMap.insert(m_ColorName->text(),m_SelectedColor);
QHBoxLayout * mnLyt = new QHBoxLayout(this);
mnLyt->addWidget(pixMap);
mnLyt->addWidget(m_ColorName);
mnLyt->addSpacerItem(new QSpacerItem(30, 0, QSizePolicy::Minimum, QSizePolicy::Minimum));
int width = pixMap->width();
int height = pixMap->height();
int side = qMin(width, height);
QRegion maskedRegion(width/2- side/2, height/2- side/2, 20,
20, QRegion::Ellipse);
pixMap->setMask(maskedRegion);
}
QString CascadeColorHighlightWidgetItem::getColorText()
{
qDebug() << "!!!CascadeColorHighlightWidgetItem::getColorText" << m_ColorName->text(); // returns "_________"
return m_ColorName->text();
}
看来虽然文本是可编辑的,但是文本中的数据没有更新,可以通过hack来解决,我们使用findChild找到flags激活时创建的QTextDocument,得到文本该元素的:
QTextDocument *td = m_ColorName->findChild<QTextDocument *>();
if(td){
QString text = td->toRawText(); // >= Qt 5.9
// td->toPlainText();
// td->toHtml();
}
示例:
#include <QApplication>
#include <QLabel>
#include <QTextDocument>
#include <QTimer>
#include <QVBoxLayout>
#include <QWidget>
#include <QDebug>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget widget;
QLabel label("_________");
label.setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextEditable);
widget.setLayout(new QVBoxLayout);
widget.layout()->addWidget(&label);
QTimer timer;
QObject::connect(&timer, &QTimer::timeout, [&label](){
QTextDocument *td = label.findChild<QTextDocument*>();
if(td){
qDebug()<<td->toRawText();
//qDebug()<<td->toPlainText();
//qDebug()<<td->toHtml();
}
});
timer.start(100);
widget.show();
return a.exec();
}
输出:
[...]
"________"
"________"
"_______"
"____f___"
"____f___"
"____ff___"
"____fff___"
"____fff___"
"____ffff___"
"____fffff___"
"____fffff___"
[...]
我在我的小部件中添加了一个 QLabel,它可以通过 UI 进行编辑,也可以设置新文本,但无法使用函数 text();
检索更新的文本 QLabel *m_ColorName = new QLabel("_________");
m_ColorName->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextEditable);
在 UI 中,我可以编辑新文本,但需要调用函数
m_ColorName->text();
它给出默认的 txt _________
代码 H档
class CascadeColorHighlightWidgetItem : public QWidget
{
Q_OBJECT
public:
CascadeColorHighlightWidgetItem(int jobID, QColor selectedColor, QWidget *parent = 0);
int getJobID();
QString getSelectedColor();
QString getColorText();
private:
QString m_titleName;
QRectF m_textRect;
QVBoxLayout *m_mainLyt;
QLineEdit *m_pTitleEditor;
QLabel *m_ColorName;
QColor m_SelectedColor;
};
源文件
CascadeColorHighlightWidgetItem::CascadeColorHighlightWidgetItem(QColor selectedColor, QWidget *parent)
: QWidget(parent),m_titleName("______"),m_SelectedColor(selectedColor)
{
setFixedHeight(40);
setContentsMargins(0,0,0,0);
setFocusPolicy(Qt::StrongFocus);
m_pTitleEditor = new QLineEdit();
m_ColorName = new QLabel("_________");
m_ColorName->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextEditable);
QFont font( "Calibri" );
font.setPixelSize(14);
m_ColorName->setFont(font);
QPixmap pixmap;
pixmap.fill(QColor("transparent"));
QWidget *pixMap = new QWidget;
pixMap->resize(100,100);
QString styl = QString("background-color: rgb(%1, %2, %3)").arg(QString::number(m_SelectedColor.red()),
QString::number(m_SelectedColor.green()),
QString::number(m_SelectedColor.blue()));
pixMap->setStyleSheet(styl);
m_ColorToStringMap.insert(m_ColorName->text(),m_SelectedColor);
QHBoxLayout * mnLyt = new QHBoxLayout(this);
mnLyt->addWidget(pixMap);
mnLyt->addWidget(m_ColorName);
mnLyt->addSpacerItem(new QSpacerItem(30, 0, QSizePolicy::Minimum, QSizePolicy::Minimum));
int width = pixMap->width();
int height = pixMap->height();
int side = qMin(width, height);
QRegion maskedRegion(width/2- side/2, height/2- side/2, 20,
20, QRegion::Ellipse);
pixMap->setMask(maskedRegion);
}
QString CascadeColorHighlightWidgetItem::getColorText()
{
qDebug() << "!!!CascadeColorHighlightWidgetItem::getColorText" << m_ColorName->text(); // returns "_________"
return m_ColorName->text();
}
看来虽然文本是可编辑的,但是文本中的数据没有更新,可以通过hack来解决,我们使用findChild找到flags激活时创建的QTextDocument,得到文本该元素的:
QTextDocument *td = m_ColorName->findChild<QTextDocument *>();
if(td){
QString text = td->toRawText(); // >= Qt 5.9
// td->toPlainText();
// td->toHtml();
}
示例:
#include <QApplication>
#include <QLabel>
#include <QTextDocument>
#include <QTimer>
#include <QVBoxLayout>
#include <QWidget>
#include <QDebug>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget widget;
QLabel label("_________");
label.setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextEditable);
widget.setLayout(new QVBoxLayout);
widget.layout()->addWidget(&label);
QTimer timer;
QObject::connect(&timer, &QTimer::timeout, [&label](){
QTextDocument *td = label.findChild<QTextDocument*>();
if(td){
qDebug()<<td->toRawText();
//qDebug()<<td->toPlainText();
//qDebug()<<td->toHtml();
}
});
timer.start(100);
widget.show();
return a.exec();
}
输出:
[...]
"________"
"________"
"_______"
"____f___"
"____f___"
"____ff___"
"____fff___"
"____fff___"
"____ffff___"
"____fffff___"
"____fffff___"
[...]