http://imagej.273.s1.nabble.com/how-to-use-MouseAdapter-tp5024620p5024624.html
Thank you. These work.
> Use:
>
> e.isShiftDown()
> e.isAltDown()
> e.isControlDown()
>
> which return boolean, and where “e” is the MouseEvent instance passed as argument to e.g., mousePressed.
>
> Albert
>
>> On Apr 18, 2021, at 2:04 PM, Aryeh Weiss <
[hidden email]> wrote:
>>
>> I found that the getModifiersEx() method works, and that if I press shift it returns 64, and control returns 128. So now I have a way to detect a pressed shift or control. The new code is
>>
>> class DliteMouseListener (MouseAdapter):
>>
>> def __init__ (self):
>> self.xLoc = 0
>> self.yLoc = 0
>> self.mods = 0
>> def mouseClicked (self, e):
>> print 'In DliteMouseListener: e.getX() =', e.getX(), ', e.getY() =', e.getY(), "mods = ", e.getModifiersEx()
>> self.xLoc = e.getX()
>> self.yLoc = e.getY()
>> self.mods = e.getModifiersEx()
>> def X(self):
>> return self.xLoc
>> def Y(self):
>> return self.yLoc
>>
>> and I run this to test it:
>>
>> while True:
>> # wd = WaitForUserDialog("select "+classOfImage)
>> # wd.show()
>> newX = dML.X()
>> newY = dML.Y()
>> if dML.mods == 64:
>> break
>> elif xLoc != newX or yLoc != newY:
>> xLoc = newX
>> yLoc = newY
>> print "top level: ",xLoc, yLoc
>>
>> However, now the strange thing is that when I click my mouse, it does thing twice, and if I hold shift, it breaks, but only after printing a set of coordinates. Here is the output for three clicks and then a 4th click while holding the shift key:
>>
>> In DliteMouseListener: e.getX() = 922, e.getY() = 507, mods = 0
>> top level: 922 0
>> top level: 922 507
>> In DliteMouseListener: e.getX() = 622, e.getY() = 517, mods = 0
>> top level: 622 507
>> top level: 622 517
>> In DliteMouseListener: e.getX() = 1044, e.getY() = 875, mods = 0
>> top level: 1044 517
>> top level: 1044 875
>> In DliteMouseListener: e.getX() = 1148, e.getY() = 768, mods = 64
>> top level: 1148 875
>>
>> For each call to the listener, it printed two points , because it ran
>> elif xLoc != newX or yLoc != newY:
>> xLoc = newX
>> yLoc = newY
>> print "top level: ",xLoc, yLoc
>> twice. Somehow , xLoc and yLoc changed even thought the mouse was not clicked.
>> If I use the WaitfForUser dialog, it all works correctly. Even if I click repeated on the WaitForUser prompt, it does not give me a second point.
>>
>> What have I done wrong?
>>
>> --aryeh
>>
>> --
>> Aryeh Weiss
>> Faculty of Engineering
>> Bar Ilan University
>> Ramat Gan 52900 Israel
>>
>> Ph: 972-3-5317638
>> FAX: 972-3-7384051
>>
>>
>>
>>> On 18/04/2021 14:35, Aryeh Weiss wrote:
>>>
>>> I am try to do something interactive, and for this reason I need to learn ho wot use MouseAdapter.
>>>
>>> I began with this, and it works fine.:
>>>
>>> from java.awt.event import MouseAdapter
>>>
>>> class DliteMouseListener (MouseAdapter):
>>>
>>> def __init__ (self):
>>> self.xLoc = 0
>>> self.yLoc = 0
>>> def mouseClicked (self, e):
>>> print 'In DliteMouseListener: e.getX() =', e.getX(), ', e.getY() =', e.getY()
>>> self.xLoc = e.getX()
>>> self.yLoc = e.getY()
>>>
>>> and this calls it:
>>>
>>> dML = DliteMouseListener()
>>> ic = inputImp.getCanvas()
>>> ic.addMouseListener (dML)
>>>
>>> So far, it works fine.
>>>
>>> Now I want to be able to detect if the shift or control key is pressed, so I looked up MouseEvent, and found
>>> getMouseModifiersText(int modifiers), so I tried to use
>>>
>>> e.getMouseModifiersText("Shift") or e.getMouseModifiersText("Control") to check if the Shift or Control key is pressed during the event.
>>>
>>> I get the following error in the Fiji ConsoleAttributeError: 'java.awt.event.MouseEvent' object has no attribute 'getModifierStateText'
>>>
>>> I tried variations of this such as using MouseEvent.shiftKey , or MouseEvent.ctrlKey, and again these attributes do not exist.
>>>
>>> When I pretty-print the MouseEvent e, I see that it gives my the coordinates, the absolute coordinates, the button number, and the clickCount. (and indeed, e.button worked).
>>>
>>> At this point I realize that I do not understand something basic about how this works.
>>>
>>> Can I modify the dML class to do this, or am I completely off target and I need something completely different to do what I am trying to do?
>>>
>>> Thanks in advance for any assistance.
>>>
>>> --aryeh
>>>
>>> --
>>> Aryeh Weiss
>>> Faculty of Engineering
>>> Bar Ilan University
>>> Ramat Gan 52900 Israel
>>>
>>> Ph: 972-3-5317638
>>> FAX: 972-3-7384051
>>>
>>
>> --
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