Does anybody (@justinedwards.jle maybe) know, how to change the cursor to HAND when on point on Easy Chart in Vision?
I have this (custom ChartMouseListener from another forum post and it is working great) in the MouseReleased event of the EasyChat to allow users to click on the point on the chart, to show relevant data:
from org.jfree.chart import ChartMouseListener
class myChartMouseListener(ChartMouseListener):
def chartMouseMoved(self, cme):
pass
def chartMouseClicked(self, cme):
chartEntity = cme.getEntity()
if chartEntity is not None:
epochLong = chartEntity.getDataset().getX(chartEntity.getSeriesIndex(), chartEntity.getItem()).longValue()
date_issued = str(system.date.fromMillis(epochLong))
selectQuery = "SELECT order_id, zacetek FROM orders_krpan WHERE zacetek = ?::timestamp"
args = [date_issued]
results= system.db.runPrepQuery(query=selectQuery,args=args,database=my_scripts.database)
if len(results)>0:
order_id = results[0][0]
date_issued = results[0][1]
selectQuery = "SELECT * FROM izdelki_podatki_krpan WHERE narocilo = ?"
args = [order_id]
results= system.db.runPrepQuery(query=selectQuery,args=args,database=my_scripts.database)
event.source.parent.ds = results
chart = event.source.parent.getComponent('Easy Chart').getComponent(0).getComponent(0)
chart.removeChartMouseListener(self)
chart = event.source.parent.getComponent('Easy Chart').getComponent(0).getComponent(0)
chart.addChartMouseListener(myChartMouseListener())
I'm assuming that one must write another listener somewhere, but I'm not good at Java... and I couldn't find any forum posts about similar... things...
I'm not where I can test code, but you should be able to import cursor and use your chartMouseMoved function. It will look like this:
from java.awt import Cursor
class myChartMouseListener(ChartMouseListener):
def chartMouseMoved(self, cme):
chartEntity = cme.getEntity()
chart = event.source.parent.getComponent('Easy Chart').getComponent(0).getComponent(0)
if chartEntity is not None:
chart.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR))
else:
chart.setCursor(Cursor.getDefaultCursor())
This repeated call within the listener bugs me. I believe this can simply be deleted, since the variable has already been created below. Furthermore, the chart is the source of the event, so if the variable did need to be created, you could simply use cme.source, or for that type of listener, IIRC, you can use cme.chart (event.chart).
I'm certain there are other improvements to made as well, but unfortunately, I'm replying from my phone. It's going to be a while before I get home to my test environment.
If this means the MouseMoved event handler of the Easy Chart, this is wrong. The script will be constructing and adding a listener every time the mouse moves a pixel. Run the script from the componentRunning property change event, so the listener only gets constructed and added once when the Easy Chart is first initialized. Then, you won't need this line of code:
I found some time to play around with this in my test environment, and I believe this to be the proper script for what you are doing:
# Check if the event property name is 'componentRunning'
# This will run once and only once when the component is first initialized
# Note: To see the effect if this in the designer, preview mode must be started prior to opening the window
if event.propertyName == 'componentRunning':
# Import the ChartMouseListener class
# ...and define a custom ChartMouseListener class that extends it
from org.jfree.chart import ChartMouseListener
class myChartMouseListener(ChartMouseListener):
# This method is triggered by any mouse movement within the chart
def chartMouseMoved(self, mouseEvent):
# Check if mouseEvent has an entity
# Set the cursor to HAND_CURSOR if an entity is present
if mouseEvent.entity:
chart.setCursor(moje_skripte.Cursor.getPredefinedCursor(Cursor.HAND_CURSOR))
# Set the cursor to the default cursor if no entity is present
else:
chart.setCursor(moje_skripte.Cursor.getDefaultCursor())
# This method is triggered by mouse clicks within the chart
def chartMouseClicked(self, mouseEvent):
# mouseEvent.entity gets used a lot in this method,
# ...so assign it to an easy to work with variable
entity = mouseEvent.entity
# If the mouse event has an entity, get the epochLong value from the entity's dataset
# ...and use it as argument in a prep query
if entity:
epochLong = entity.dataset.getX(entity.seriesIndex, entity.item).longValue()
results = system.db.runPrepQuery(
query="SELECT order_id, zacetek FROM orders_krpan WHERE zacetek = ?::timestamp",
args=[unicode(system.date.fromMillis(epochLong))],
database=my_scripts.database)
# If the query returns a result, use the [0],[0] value as an argument in a subsequent query
# Assign the result of the subsequent query to a dataset property
if results:
event.source.parent.ds = system.db.runPrepQuery(
query="SELECT * FROM izdelki_podatki_krpan WHERE narocilo = ?",
args=[results[0][0]],
database=my_scripts.database)
# Get the inner chart from the Easy Chart component, and add the custom listener to it.
chart = event.source.parent.getComponent('Easy Chart').getComponent(0).getComponent(0)
chart.addChartMouseListener(myChartMouseListener())
