Add the logic to export a graph as a PDF of PNG file.

.gitignore

 *~
-*.pdf
 .project
 .pydevproject
 *.pyc

controllers/plugin_event.py

@@ -48,8 +48,22 @@ def graph_mpl():
     # build the report title
     title = do_title(config, selector)
 
+    # extract the image
+    # encode special character to be used in the image URI
+    extension = request.extension
+
+    if extension == "html":
+        data = graph.to_svg()
+        data = urllib.quote(data)
+
+    elif extension == "pdf":
+        data = graph.to_pdf()
+
+    elif extension == "png":
+        data = graph.to_png()
+
     # delegate the rendering to the view
-    return dict(data=graph.to_svg(), title=title)
+    return dict(data=data, title=title)
 
 
 def grid():

languages/fr-fr.py

@@ -118,6 +118,8 @@
 'events': 'évènements',
 'Evènement': 'Evènement',
 'Executed': 'Executé',
+'Export to PDF...': 'Exporter au format PDF...',
+'Export to PNG...': 'Exporter au format PNG...',
 'Feature not yet implemented ...': 'Feature not yet implemented ...',
 'Features': 'Features',
 'Field': 'Champ',
@@ -293,6 +295,7 @@
 'Please select a metric!': 'Sélectionnez une metrique !',
 'Plot': 'Plot',
 'plugin not install': 'greffon pas installé',
+'Processing time %s seconds': 'Image générée en %s secondes',
 'Profile': 'Profile',
 'Project': 'Projet',
 'project leader,...': 'project leader,...',
@@ -318,6 +321,7 @@
 'Reset Password key': 'Reset Password key',
 'responsibilities': 'responsabilités',
 'Responsibility': 'Responsabilité',
+'Right click on the image in order to export it...': "Click droit sur l'image pour l'exporter...",
 'Role': 'Role',
 "Row are grouped according to the value of that field. It can be any field of the history table including those of the foreign tables, the individual property of the history.data dictionary, or 'year'.": "Les lignes sont regroupées en fonctions des valeurs de ce champ. C'est un champ de la table historique en incluant tous les champs des tables étrangères, les clés du dictionaire history.data , ou 'year'.",
 'Select': 'Selectionnez',

modules/plugin_event/report_objects.py

@@ -62,7 +62,7 @@ def do_title(config, selector):
 
     elif selector.year_start and selector.year_end:
         years = (str(selector.year_start), str(selector.year_end))
-        metadata.append(T("from %s to %s") % years)
+        metadata.append(T("from %s to %s", lazy=False) % years)
 
     return "%s: %s" % (title, " / ".join(metadata))
 

views/plugin_event/graph_mpl.html

 {{
-    #--------------------------------------------------------------------------
+    #.........................................................................
     #
     # The python controller return image as a string:
     #   - data (string)
     #   - title (string)
     #
-    #--------------------------------------------------------------------------
+
+    import datetime
     import urllib
 
-    #
-    # The title
-    #
-    response.write(H2(title, _class="dbui-h2 dbui-small-cap"))
+    # build the url to retrieve the png or pdf image
+    # it should contains the  current "vars" use to generate the image
+
+    myapp = request.application
+    myvars = urllib.urlencode(request.vars)
+
+    url_pdf = "/%s/plugin_event/graph_mpl.pdf?%s" % (myapp, myvars)
+    url_png = "/%s/plugin_event/graph_mpl.png?%s" % (myapp, myvars)
+
+    # unique identfier for the div block
+    divid = "myimage-%i" % id(data)
+
+    # elapse time for the footer
+
+    delta = (datetime.datetime.now()-request.now).total_seconds()
+    processing_time = T('Processing time %s seconds') % round(delta, 2)
 
-    # encode special charactier bo be used in the image URI
-    data = urllib.quote(data)
+    # translate
+    trExport = T("Right click on the image in order to export it...")
+    trToPDF = T("Export to PDF...")
+    trToPNG = T("Export to PNG...")
 
 }}
-<img src="data:image/svg+xml;utf8,{{=data}}" height=400></img>
+
+<h2 class="dbui-h2 dbui-small-cap">{{=title}}</h2>
+<div id="{{=divid}}"></div>
+<p class="dbui-p">
+<br>
+{{=trExport}}<br>
+{{=processing_time}}
+</p>
+
+<script type="text/javascript">
+
+    /**
+     * Create the panel to include the image
+     * The panel allow to expose a context menu which can be used to
+     * export the image in different format
+     */
+
+    var menu, panel;
+
+    panel = Ext.create("Ext.panel.Panel", {
+        border: false,
+        html: '<img src="data:image/svg+xml;utf8,{{=data}}" height=400></img>',
+        layout: "fit",
+        padding: "0 0 0 30",
+        renderTo: "{{=divid}}",
+    });
+
+    menu = Ext.create("Ext.menu.Menu", {
+        items: [{
+            text: "{{=trToPNG}}",
+            href: "{{=url_png}}"
+        }, {
+            text: "{{=trToPDF}}",
+            href: "{{=url_pdf}}",
+            iconCls: 'xminetype-pdf'
+        }]
+    });
+
+    panel.body.on("contextmenu", function(event) {
+        event.stopEvent();
+        menu.showAt(event.getXY());
+    });
+
+</script>

views/plugin_event/graph_mpl.pdf

+{{
+    import cStringIO
+    response.body = cStringIO.StringIO()
+
+    response.headers['Content-Type']='application/pdf'
+    response.write(data, escape=False)
+}}
\ No newline at end of file

views/plugin_event/graph_mpl.png

+{{
+    import cStringIO
+    response.body = cStringIO.StringIO()
+
+    response.headers['Content-Type']='application/png'
+    response.write(data, escape=False)
+}}
\ No newline at end of file