不绘制QWT绘图轴 [英] Not Drawing QWT Plot Axis

问题描述

我试图使用QWT绘制一个绘图，没有任何标题或轴标签。没有绘制标题似乎很容易，所有你要做的是不将它传递到标题，或者如果已经有一个，只是给它一个空字符串（如下）：

I'm trying to draw a plot using QWT without any title or axis labels. Not drawing the title seems easy, all you have to do is not pass it in a title, or if there already is one, just give it an empty string (like this):

ui->plot->setAxisTitle(QwtPlot::xBottom, "");
ui->plot->setAxisTitle(QwtPlot::yLeft, "");

但是默认情况下绘制实际的标签（在axisScale属性内）（从0到1000 x和y）。但是，即使我可以改变它的外观，我不能删除它的完全。

But the actual labels (inside the axisScale property) are drawn by default (going from 0 to 1000 in both x and y). However even though I can change the way it looks, I can't remove it altogether.

因此有任何方法来绘制一个qwt图没有任何轴标签或标题？

So is there any way to draw a qwt plot without any axis labels or titles?

推荐答案

如果您不想使用比例或标签，则会有效：

If you don't want the scale or the labels, this will work:

ui->plot->enableAxis(QwtPlot::xBottom, false);
ui->plot->enableAxis(QwtPlot::yLeft, false);

如果你想显示没有标签的scale，你可以实现你自己的 QwtScaleDraw 对象，它为所有标签返回一个空的 QwtText 对象：

If you want to show the scales with no labels, you can implement your own QwtScaleDraw object that returns an empty QwtText object for all of the labels:

class MyScaleDraw : public QwtScaleDraw
{
public:
    MyScaleDraw() : QwtScaleDraw() { }
    virtual ~MyScaleDraw() { }
    virtual QwtText label(double) const
    {
        return QwtText();
    }
};

//...

ui->plot->setAxisScaleDraw(Qwt::xBottom, new MyScaleDraw);
ui->plot->setAxisScaleDraw(Qwt::yLeft, new MyScaleDraw);

可能有更好的方法，但这是我想到的。

There may be a better way, but this is one I could think of.

这篇关于不绘制QWT绘图轴的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！