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Re: [Matplotlib-users] Test results and new questions
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From: Bogdan M. <bog...@gm...> - 2004-07-22 13:18:16
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Ok, I tested the toolbar again and this time everything is fine. I
guess that I was distracted by the fact that the "Pan" and "Zoom to
rectangle" buttons don't look as they are pressed when I press them :)
I mean, they don't change their visual appearance. They look like
normal buttons, but they should probably be toggle buttons. Apart from
that, everything else is fine. I don't need a recipe for JPG, i also
prefer PNG, i just signaled this because I thought it was a problem.
For printing ... I don't know :( I'll try to post a question to the wx
list and come back to you all if I receive a solution.
Thank you very much for your support. Yes, again :)
Bogdan
On Thu, 22 Jul 2004 07:24:21 -0500, John Hunter
<jdh...@ac...> wrote:
> >>>>> "Marinescu" == Marinescu Bogdan-bmarine1 <bog...@fr...> writes:
>
> Marinescu> Hi John, Thanks for the quick reply, I was really
> Marinescu> happy to download the snapshot and see that it works. I
> Marinescu> tested in on wxPython 2.5.1.5 without problems, it
> Marinescu> would probably work the same on 2.4.2.4. I'm not quite
> Marinescu> familiar with the toolbar functions, so I don't know if
> Marinescu> the results I'm getting are right. The "home" button
> Marinescu> seems to do something, I can see a visual indication of
> Marinescu> the repaint when I press it. On the other hand, the
> Marinescu> "pan" button seems to be disabled; even if I can press
> Marinescu> it, I'm unable to select it (or it isn't supposed to be
> Marinescu> selectable?) Maybe this is normal for the example that
> Marinescu> you sent in your e-mail? Because of this, I can't test
> Marinescu> the functionality of the back/forward buttons. The
> Marinescu> "zoom to rect" button also seems to be disable,
> Marinescu> probably because I didn't use the zoom function, which
> Marinescu> is also related to the "pan" button, if I understand it
> Marinescu> correctly. The "save" button worked when trying to save
> Marinescu> a PNG image, but the program exited with a "Do not know
> Marinescu> know to handle extension *.jpg" message printed on the
> Marinescu> console when trying to save a JPG image. Again, I don't
> Marinescu> know if this behavior is correct or not, I'm just
> Marinescu> posting my results.
>
> These buttons don't do what you think they do because they all work
> very differently from the classic matplotlib toolbar (else why
> introduce a new one!)
>
> The Forward and Back buttons are akin to the web browser forward and
> back buttons. They are used to navigate back and forth between
> previously defined views. They have no meaning unless you have
> already navigated somewhere else using the pan and zoom buttons. This
> is analogous to trying to click 'back' on your web browser before
> visiting a new page. Nothing happens. 'Home' always takes you to the
> first view. For Home, Forward and Back, think web browser where data
> views are web pages. Use the pan and zoom to rectangle to define new
> views.
>
> The "Pan" button has two modes: pan and zoom. Click this toolbar
> button to activate this mode. Then put your mouse somewhere over an
> axes. Mode 1: Press the left mouse button and hold it, dragging it to
> a new position. When you release it, the data under the point where
> you pressed will be moved to the point where you released. Mode 2:
> Press the right mouse button, dragging it to a new position. The x
> axis will be zoomed in proportionate to the rightward movement and
> zoomed out proportionate to the leftward movement. Ditto for the
> yaxis and up/down motions.
>
> The Zoom to rectangle button: Click this toolbar button to activate
> this mode. Put your mouse somewhere over and axes and press the left
> mouse button. Drag the mouse while holding the button to a new
> location and release. The axes view limits will be zoomed to the
> rectangle you have defined.
>
> Save: click this button to launch a file save dialog. All the *Agg
> backends know how to save the following image types: PNG, PS, EPS,
> SVG. There is no support currently in Agg for writing to JPEG, TIFF
> (the regular wx and gtk backends handle these types). It is possible
> to use matplotlib/agg + PIL to convert agg images to one of these
> other formats if required. I can provide a recipe for you. I prefer
> PNG over JPG and TIFF, which is why I haven't worked too hard to
> include these other image formats in agg.
>
> Marinescu> I don't plan on using the toolbar
> Marinescu> in my application, I have another (specialized) toolbar
> Marinescu> and I'll be using its functions.
>
> OK, perhaps you could give it one more time just to make sure my
> instructions above are clear and that it is working fine on your
> system?
>
> Marinescu> The new event handling mechanism is great and it's
> Marinescu> exactly what I needed. However, I have a couple of
> Marinescu> fresh new questions for you :) The first one was also
> Marinescu> present in my previous e-mail. When I create the plot
> Marinescu> it has very large margins to the parent frame. This is
> Marinescu> not convenient to me, as I'd like to have a plot that
> Marinescu> is as large as possible and margins as small as
> Marinescu> possible. Is there a way to modify these margins?
>
> Yes, you can position axes anywhere you want in any size using the
> axes command. See
> http://matplotlib.sf.net/matplotlib.matlab.html#-axes and the example
> http://matplotlib.sf.net/examples/axes_demo.py.
>
> Marinescu> The other one is really new and it is related to
> Marinescu> printing. Is there a way to print directly from the
> Marinescu> library? I'm aware of the image save/image print combo
> Marinescu> and I can use it if I have no other option. However, at
> Marinescu> this point my application (which is quite critical)
> Marinescu> blocks every task switching combination (ctrl+atl+del
> Marinescu> included, together with alt+tab and all the others) in
> Marinescu> order to force the user to use this application and
> Marinescu> ONLY this application. If I choose the "image save"
> Marinescu> option I'll be forced to give up this feature, and I
> Marinescu> don't want that, as I _KNOW_ that they'll start to play
> Marinescu> starcraft in a flash :) Unless there is some Python
> Marinescu> source somewhere that can send an image to the
> Marinescu> printer. I've been searching for it, but never found
> Marinescu> it. I also had this problem with PyPlot, that offers
> Marinescu> printing functions, but they don't seem to work :(
> Marinescu> (this was tested on two different printers). Then
> Marinescu> again, the "Print framework" sample from the wxPython
> Marinescu> 2.5.1.5 demo also crashed when trying to print, so I
> Marinescu> imagine that the printing support in wxPython is not at
> Marinescu> its best at this point :( If anybody has a solution for
> Marinescu> this, please let me know. Thank you all for your help.
>
> cross platform printing is pretty hard, and cross-gui/cross-platform
> printing is event harder. If you get wx printing figured out and want
> to submit some code, I'd be happy to include it. When I was initially
> trying to decide on a GUI for my own application work, poor printing
> support in wx the thing that initially steered me to GTK.
>
> JDH
>
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--
Bogdan
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