setting color of the text in qwtdial partially

[Navi]

i can able to set the color of the text in qwt dial.
but i need to set the color of the text partially.

Example:
if lowerbound is 0 and upperbound is 100

i need the text color for 0 to 40 to be one color(say green)
and text color for 40 to 100 to be another color(say blue)

[Uwe]

Overload QwtRoundScaleDraw::label() and assign your derived class using QwtDial::setScaleDraw().
By using QwtText::setColor() you can set individual color for a label.

Uwe

[Navi]

Overload QwtRoundScaleDraw::label() and assign your derived class using QwtDial::setScaleDraw().
By using QwtText::setColor() you can set individual color for a label.

Uwe

Thanks Uwe

i need the color of dial also as two different colors
like first half part of the dial as one color and remaining half of the dial as another color

[Uwe]

Which parts of the dial - do you have a screenshot ?

Uwe

[Navi]

Untitled.png

i have attached the image

[Uwe]

Again you can do it by overloading methods from QwtRoundScaleDraw - here drawBackbone(). You could use a gradient or draw the arc in segments with different pens.
Have a look at the default implementations of QwtRoundScaleDraw, then it should be straightforward how to do it.

Uwe

[Navi]

Again you can do it by overloading methods from QwtRoundScaleDraw - here drawBackbone(). You could use a gradient or draw the arc in segments with different pens.
Have a look at the default implementations of QwtRoundScaleDraw, then it should be straightforward how to do it.

Uwe

I referred QwtRoundScaleDraw .but i couldn't understand..

please can you give me example for drawBackbone in QwtRoundScaleDraw

[Uwe]

Qwt is open source - there is no better example than simply looking at the code.

Uwe