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Thread: Help: How do I restore original plot after several zooms?

  1. #1
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    Default Help: How do I restore original plot after several zooms?

    Hi all,

    I have just made a QwtPlot to render contours quite successfully thanks to the help of several people, particularly Uwe. Now I run into another problem and hope you could help me out again:

    1) How do I restore the original plot after user perform several zooms? I am using the Spectrogram example here.

    2) How do I right markers at certain point on the plot? Like a "+" and a legend beneath it or something to the same effect?

    Thank you so much for all your help.
    Sincerely,

    Wieland J.

  2. #2
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    Default Re: Help: How do I restore original plot after several zooms?

    Any one, please?
    Sincerely,

    Wieland J.

  3. #3
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    Default Re: Help: How do I restore original plot after several zooms?

    Quote Originally Posted by jwieland View Post
    1) How do I restore the original plot after user perform several zooms? I am using the Spectrogram example here.
    The default implementation of the zoomer unzooms after a click with the right mouse button or pressing ESC. Of course you can configure your zoomer object to implement your individual type of navigation.
    2) How do I right markers at certain point on the plot? Like a "+" and a legend beneath it or something to the same effect?
    Use a picker in point selection mode and connect the selected(QwtDoublePoint &) signal to a slot, where you insert your marker.

    HTH,
    Uwe

  4. #4
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    Default Re: Help: How do I restore original plot after several zooms?

    Uwe,

    Again, you are a life saver. Thanks.
    Sincerely,

    Wieland J.

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