更改QLineEdit占位符文本的颜色

Question

I am writing an application in Qt 4.8 and taking advantage of styling through CSS. When styling QLineEdit there are properties such as selection-background-color , is there a property that will allow me to change the color of placeholder text?

If not, are there any other methods of changing it?

Answer 1

The color of the placeholder is the color of the text with alpha set to 50%. At least in 4.7 this was hardcoded and could thus not be changed with style.

As the decision is implemented in QLineEdit::paintEvent you could override paintEvent in a derived class and change the color to whatever suits you fine.

But why would you want a different color? If you change it to red or something like that, you might irritate a user who cannot distinguish a placeholder from "real" text anymore.

Answer 2

也许可以将调色板更改连接到信号textChanged（）：当行编辑为空时，更改文本颜色。