no member named 'transformChanged' in 'QGraphicsView'
时间: 2023-12-27 09:02:06 浏览: 23
这个错误通常出现在使用Qt的QGraphicsView类时,该类没有名为transformChanged的成员函数。这可能是因为您的代码中使用了QGraphicsView的版本不同于您当前使用的Qt版本的文档所描述的版本。您可以参考Qt文档中与您使用的Qt版本相对应的QGraphicsView类的API文档,以查看可用的成员函数和其用法。您还可以检查您的代码中是否存在拼写错误或其他语法错误。
相关问题
error: ‘class QGraphicsView’ has no member named ‘setChart’
抱歉,我之前的回答有误。`QGraphicsView`确实没有`setChart`方法,因为它是一个用于显示图形项的视图类,而不是用于显示图表的类。如果你想在`QGraphicsView`中显示饼状图,你需要使用`QChartView`作为它的子类。
请将你的代码中的`QGraphicsView`改为`QChartView`,然后再尝试运行。修改后的代码如下所示:
```cpp
QPieSeries *pie_series;
pie_series = new QPieSeries(this);
//定义各扇形切片的颜色
static const QStringList list_pie_color = {
"#6480D6","#A1DC85","#FFAD25","#FF7777","#84D1EF","#4CB383",
};
//设置数据
QList<qreal> list_data = {3.1, 3.2, 3.3, 3.4, 3.5, 3.6};
//扇形
for (int i = 0; i < list_pie_color.size(); i++)
{
QPieSlice* pie_slice = new QPieSlice(this);
pie_slice->setLabelVisible(true);
pie_slice->setValue(list_data[i]);
pie_slice->setLabel(QString::number(list_data[i]));
pie_slice->setColor(list_pie_color[i]);
pie_slice->setLabelColor(list_pie_color[i]);
pie_slice->setBorderColor(list_pie_color[i]);
pie_series->append(pie_slice);
}
//图表视图
QChart* chart = new QChart;
chart->setTitle("岩性分布统计图");
// chart->setTheme(QChart::ChartThemeDark);
//标题字体
QFont font = qApp->font();
font.setBold(true);
font.setPointSize(16);
chart->setTitleFont(font);
//加入饼图
chart->addSeries(pie_series);
chart->setAnimationOptions(QChart::SeriesAnimations);
//图例
chart->legend()->setAlignment(Qt::AlignBottom);
chart->legend()->setBackgroundVisible(false);
QChartView* chartView = new QChartView(chart);
chartView->setRenderHint(QPainter::Antialiasing);
chartView->setFixedSize(400, 400);
ui->graphicsView_type_pie->setScene(new QGraphicsScene());
ui->graphicsView_type_pie->scene()->addWidget(chartView);
```
这样修改后,你应该能够在`QGraphicsView`中显示饼状图了。
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.