servlets - Google Chart - Populate with JSON -

-

i have been trying fill google chart dynamicly, example: https://developers.google.com/chart/interactive/docs/php_example

i'm using dependency datatable class , others:

<dependency>     <groupid>com.google.visualization</groupid>     <artifactid>visualization-datasource</artifactid>     <version>1.1.1</version> </dependency>

this api datatable class: https://developers.google.com/chart/interactive/docs/dev/dsl_javadocs/com/google/visualization/datasource/datatable/datatable

i'm using java httpservlet contains code (example) populate datatable:

datatable datatable = new datatable(); datatable.addcolumn(new columndescription("uur", valuetype.text, "uur")); datatable.addcolumn(new columndescription("aantal", valuetype.number, "aantal spellen"));         try {     datatable.addrowfromvalues("1", 5, true);     datatable.addrowfromvalues("2", 9, true);     datatable.addrowfromvalues("3", 17, true); } catch (typemismatchexception ex) {     logger.getlogger(verkrijgchartdataservlet.class.getname()).log(level.severe, null, ex); }

i included make return json:

response.setcontenttype("application/json");

then gson convert json string:

new gson().tojson(datatable);

this returns string of format:

{   "columnindexbyid" : {"aantal":1, "uur":0},   "columns" : [       {"id":"uur","label":"uur","pattern":"","type":"text"},       {"id":"aantal","label":"aantal spellen","pattern":"","type":"number"}     ],   "rows" : [        {"cells":[{"value":{"value":"1"}},{"value":{"value":5.0}}]},       {"cells":[{"value":{"value":"2"}},{"value":{"value":9.0}}]},       {"cells":[{"value":{"value":"3"}},{"value":{"value":17.0}}]},     ],   "warnings" : [] }

but google chart says: 'table has no colums.' google's example json looks this:

{   "cols": [         {"id":"","label":"topping","pattern":"","type":"string"},         {"id":"","label":"slices","pattern":"","type":"number"}       ],   "rows": [         {"c":[{"v":"mushrooms","f":null},{"v":3,"f":null}]},         {"c":[{"v":"onions","f":null},{"v":1,"f":null}]},         {"c":[{"v":"olives","f":null},{"v":1,"f":null}]},         {"c":[{"v":"zucchini","f":null},{"v":1,"f":null}]},         {"c":[{"v":"pepperoni","f":null},{"v":2,"f":null}]}       ] }

does has idea of i'm doing wrong? need else? thanx in advance.

a bit late better late never. think know answer question.

you know answer. in question, give google chart json example. json string needs start 

{"cols":...}

while json string, rendered gson, starts 

{"columnindexbyid":{...},  "columns":... }

if pass json string google datatable visualisation, its structure needs google example. instead of "columns", needs "cols".


Comments

Post a Comment

Popular posts from this blog

Perl - how to grep a block of text from a file -

-
it can in xml or text format. how in general grep block of text in perl? <track type="ws"> <range> <rangestart>0</rangestart> <rangeend>146.912</rangeend> <locationindex>0</locationindex> <propertyindex>0</propertyindex> </range> </track> <track type="ps" id="1"> <range> <rangestart>0</rangestart> <rangeend>146.912</rangeend> <locationindex>1</locationindex> <propertyindex>1</propertyindex> </range> </track> i want grep type="ps" , till </range> . one solution open file, read line line , match block. open(fh, "file.txt"); foreach $line (<fh>) { if ($line =~ m/type="cc"(.*?)<\/range>/) { print $1; } } but there more optimal solution without reading file line l
Read more

delphi - How to remove all the grips on a coolbar if I have several coolbands? -

-
Image
if set mycoolbar.fixedorder true,only grip on first band hidden. well,if use delphi 7 create vcl forms application,then put coolbar on , create 3 coolbans hold other controls,only grip , top coolbands can hidden setting mycoolbar.fixedorder:=true. i've uploaded picture make things clear. you got fixedorder property wrong. fixed property not allow bands rearranged if set true . setting property of coolbar true keep user changing bands order @ runtime, user can still move , resize bands. can give advice can do, actual solution problem, well, have wait answer. my advice use 3 coolbars in row , setting "fixedorder" property true , bandborderstyle bsnone . way grip hidden on of them. about property, it's not bug of ide, actual preference of property.
Read more

javascript - Animating array of divs; only the final element is modified -

-
this baffling me @ moment. i'm experienced programmer looking throw bit of surprise fiancee on countdown page our wedding. desired effect simulated confetti falling behind main page. setup follows: i have array of divs in javascript. each div absolutely positioned on page. have interval set updates every 50 or milliseconds. on each tick, run loop on array of divs, , calculations , update positions. problem problem having, however, though can see divs created, stored array, , modified (in case, each has slight randomized rotation) during initialization phase, once tick update position starts, div stored in whatever last slot of array gets position updated. tried hard-coding each div index testing purposes, strictly last element update position. upon printing current "left" , "top" style values each div before , after calculations shows value has been changed, no visible change noticeable. here's basic code: javascript var container;
Read more