<img src="{{=embed64(data=imagebinarydata)}}" />
will work (not on IE).
Be aware that nobody ever does this. Nobody ever embeds images in
HTML. Although it is cool in come cases.
People normally just have source point to the action that generates
the PNG.
Massimo
On Dec 16, 6:43 pm, aus <[email protected]> wrote:
> here I am again...
> I fell like a moron, but I just cannot have it work...
>
> so, the last line of the controller is:
> return dict(imagebinarydata=stream.getvalue())
>
> and this is the corresponding view:
> {{extend 'layout.html'}}
> <h1>This is the matplotlib/simple.html template</h1>
> <img src="{{=embed64(data = {{=imagebinarydata}} ) }}" />
>
> unfortunately the syntax is wrong:
>
> response.write(embed64(data = {{=imagebinarydata)
> ^
> SyntaxError: invalid syntax
>
> and I don't quite understand why.
> Is it also necessary to include extension='image/png' in the call to
> embed64?
>
> Thanks!
>
> Cheers,
> aus
>
> On Dec 17, 1:02 am, aus <[email protected]> wrote:
>
> > Thank you, Massimo!
> > Sorry for the multiple posts... I didn't mean it :)
>
> > cheers,
> > ale
>
> > On Dec 16, 7:26 pm, mdipierro <[email protected]> wrote:
>
> > > You have to do it the old fashion way
>
> > > <img src="url_to_the_png_action" />
>
> > > web2py allows you to do
>
> > > <img src="{{=embed64(data='imagebinarydata')}}" /> but this is not
> > > supported by IE.
>
> > > Massimo
>
> > > On Dec 16, 11:59 am, aus <[email protected]> wrote:
>
> > > > now the question is how to place the figure in a variable to be used
> > > > in a template. What's the best way of doing that? Should I pack the
> > > > stream into a dict? How should the view look like?
>
> > > > thanks!
> > > > aus
>
> > > > On Dec 16, 5:27 pm, aus <[email protected]> wrote:
>
> > > > > ok, I found it, I mistyped 'Content-Type', my fault
>
> > > > > thanks!
> > > > > aus
>
> > > > > On Dec 16, 5:04 pm, aus <[email protected]> wrote:
>
> > > > > > ok, it works, but firefox displays the raw data, not a figure. I
> > > > > > guess
> > > > > > I need an appropriate view for that, am I right?
>
> > > > > > Cheers
> > > > > > aus
>
> > > > > > On Dec 16, 4:56 pm, mdipierro <[email protected]> wrote:
>
> > > > > > > response.header['content-type']='image/png'
>
> > > > > > > should have been
>
> > > > > > > response.headers['Content-Type']='image/png'
>
> > > > > > > Massimo
>
> > > > > > > On Dec 16, 9:48 am, aus <[email protected]> wrote:
>
> > > > > > > > Hi Massimo,
>
> > > > > > > > thank you for the *really* prompt reply!
> > > > > > > > I managed to have Dojox charts work, but I'm getting a error
> > > > > > > > message
> > > > > > > > form the "matplotlib" code (btw, "import datetime" was
> > > > > > > > missing). I
> > > > > > > > pasted the Dojo code at the bottom of this email, just in case
> > > > > > > > I'm not
> > > > > > > > the only beginner around :)
>
> > > > > > > > Traceback (most recent call last):
> > > > > > > > File "/home/aus/Software/Web2py/web2py/gluon/restricted.py",
> > > > > > > > line
> > > > > > > > 62, in restricted
> > > > > > > > exec ccode in environment
> > > > > > > > File
> > > > > > > > "/home/aus/Software/Web2py/web2py/applications/test/controllers/
> > > > > > > > matplotlib.py", line 29, in <module>
> > > > > > > > File "/home/aus/Software/Web2py/web2py/gluon/globals.py",
> > > > > > > > line 55,
> > > > > > > > in <lambda>
> > > > > > > > self._caller=lambda f: f()
> > > > > > > > File
> > > > > > > > "/home/aus/Software/Web2py/web2py/applications/test/controllers/
> > > > > > > > matplotlib.py", line 23, in simple
> > > > > > > > response.header['content-type']='image/png'
> > > > > > > > TypeError: 'NoneType' object does not support item assignment
>
> > > > > > > > what's wrong with the response?
>
> > > > > > > > thank you once again!
>
> > > > > > > > Cheers,
> > > > > > > > aus
>
> > > > > > > > Dojo / Dojox charting / JSON example:
>
> > > > > > > > <script type="text/javascript">
>
> > > > > > > > dojo.require("dojox.charting.Chart2D");
> > > > > > > > {{import gluon.contrib.simplejson as sj}}
>
> > > > > > > > function plott(){
> > > > > > > > //var dd = dojox.json.ref.fromJson(data);
> > > > > > > > //var data = [1,3,2,4,3,6];
> > > > > > > > console.debug({{=sj.dumps(data)}});
> > > > > > > > var chart1 = new dojox.charting.Chart2D("simplechart");
> > > > > > > > chart1.addPlot("default", {type: "Lines"});
> > > > > > > > chart1.addAxis("x");
> > > > > > > > chart1.addAxis("y", {vertical: true});
> > > > > > > > chart1.addSeries("Series 1", {{=sj.dumps(data)}});
> > > > > > > > chart1.render();};
>
> > > > > > > > dojo.addOnLoad(plott);
>
> > > > > > > > </script>
>
> > > > > > > > On Dec 16, 3:49 pm, mdipierro <[email protected]> wrote:
>
> > > > > > > > > In web2py+matplotlib:
>
> > > > > > > > > def simple():
> > > > > > > > > import random, cStringIO
>
> > > > > > > > > from matplotlib.backends.backend_agg import
> > > > > > > > > FigureCanvasAgg as
> > > > > > > > > FigureCanvas
> > > > > > > > > from matplotlib.figure import Figure
> > > > > > > > > from matplotlib.dates import DateFormatter
>
> > > > > > > > > fig=Figure()
> > > > > > > > > ax=fig.add_subplot(111)
> > > > > > > > > x=[]
> > > > > > > > > y=[]
> > > > > > > > > now=datetime.datetime.now()
> > > > > > > > > delta=datetime.timedelta(days=1)
> > > > > > > > > for i in range(10):
> > > > > > > > > x.append(now)
> > > > > > > > > now+=delta
> > > > > > > > > y.append(random.randint(0, 1000))
> > > > > > > > > ax.plot_date(x, y, '-')
> > > > > > > > > ax.xaxis.set_major_formatter(DateFormatter('%Y-%m-%d'))
> > > > > > > > > fig.autofmt_xdate()
> > > > > > > > > canvas=FigureCanvas(fig)
> > > > > > > > > response.header['content-type']='image/png'
> > > > > > > > > stream=cStringIO.StringIO()
> > > > > > > > > canvas.print_png(stream)
> > > > > > > > > return stream.getvalue()
>
> > > > > > > > > Massimo
>
> > > > > > > > > On Dec 16, 6:12 am, aus <[email protected]> wrote:
>
> > > > > > > > > > Hi Massimo,
>
> > > > > > > > > > thank you for your reply. Your suggestion does not seem to
> > > > > > > > > > work, but
> > > > > > > > > > maybe I'm not using Dojo properly. How would you code the
> > > > > > > > > > plot with
> > > > > > > > > > flot?
>
> > > > > > > > > > Also, it would be great to be able to embed images/charts
> > > > > > > > > > generated by
> > > > > > > > > > matplotlib, similarly to what can be done with
> > > > > > > > > > django:http://www.scipy.org/Cookbook/Matplotlib/Django. Is
> > > > > > > > > > there a similar
> > > > > > > > > > feature in web2py?
>
> > > > > > > > > > Thank you!
>
> > > > > > > > > > Cheers,
> > > > > > > > > > aus
>
> > > > > > > > > > On Dec 16, 6:57 am, mdipierro <[email protected]>
> > > > > > > > > > wrote:
>
> > > > > > > > > > > I do not know about Dojo. I have been using flot instead.
> > > > > > > > > > > perhaps this
> > > > > > > > > > > helps
>
> > > > > > > > > > > {{import gluon.contrib.simplejson as sj}}
> > > > > > > > > > > {{=sj.dumps(data)}}
>
> > > > > > > > > > > data will be printed in the page in json format. If your
> > > > > > > > > > > view/template
> > > > > > > > > > > includes javascript code you can put the above statements
> > > > > > > > > > > in the js
> > > > > > > > > > > itself.
>
> > > > > > > > > > > Perhaps other users can help more.
>
> > > > > > > > > > > Massimo
>
> > > > > > > > > > > On Dec 15, 11:31 pm, aus <[email protected]>
> > > > > > > > > > > wrote:
>
> > > > > > > > > > > > Hi everybody,
>
> > > > > > > > > > > > although I have some experience with programming,
> > > > > > > > > > > > javascript/AJAX is
> > > > > > > > > > > > completely new to me. I'm very happy with web2py and
> > > > > > > > > > > > I'm trying now to
> > > > > > > > > > > > pass arrays and possibly more structured data to Dojox
> > > > > > > > > > > > to plot series
> > > > > > > > > > > > computed in python using Dojox's charts. How can I do
> > > > > > > > > > > > that? I somehow
> > > > > > > > > > > > cannot cross the wall between the templace code and the
> > > > > > > > > > > > javascript
> > > > > > > > > > > > code... Is JSON a possible solution? Could someone
> > > > > > > > > > > > provide an example?
>
> > > > > > > > > > > > thank you!
>
> > > > > > > > > > > > Cheers,
> > > > > > > > > > > > aus
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