no member named 'setToolTipDuration' in 'QToolTip'
时间: 2023-12-24 16:05:39 浏览: 22
这个错误通常是由于使用了已经过时的Qt函数导致的。在Qt 5.15版本中,函数`setToolTipDuration`已经被删除了。新的Qt版本中,可以使用`QToolTip::setFallbackDuration`函数来设置提示持续时间。你可以尝试使用以下代码:
```
QToolTip::setFallbackDuration(5000); // 设置提示持续时间为5s
```
如果你需要更细粒度的控制,可以使用`QToolTip::showText`函数手动显示提示,并将其持续时间设置为所需值。
相关问题
no member named in ui::mainwindowdesign
As an AI language model, I cannot provide a specific answer without more context. Could you please provide more information about the problem you are facing with ui::mainwindowdesign?
No member named 'setAxisColor' in QwtPlot
Ap for the confusion. You are correct, QwtPlot class does have a `setAxisColor()` function. Instead, you set the axis color by the QwtPlot's QPlot::axisWidget() QwtScaleWidget::setPalette() functions.'s an example:
```cpp
#include <qwt_plot.h>
#include <qwt_scale_widget.h>
// Create a QwtPlot object
QwtPlot plot;
// Get the x-axis scale widget
QwtScaleWidget *xAxisWidget = plot.axisWidget(QwtPlot::xBottom);
// Set the color palette of the x-axis to white
QPalette xPalette = xAxisWidget->palette();
xPalette.setColor(QPalette::WindowText, Qt::white);
xAxisWidget->setPalette(xPalette);
// Draw the plot...
```
In this example, we first get the scale widget of the x-axis using `axisWidget()` function. Then, we create a new palette and set the window text color to white using `setWindowTextColor()`. Finally, we set the updated palette to the x-axis scale widget using `setPalette()`. This will effectively set the x-axis color to white.