Home » Eclipse Projects » GEF » Deferring editing to a different part
| Deferring editing to a different part [message #181595] |
Tue, 17 May 2005 22:44  |
Eclipse User |
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Originally posted by: freddie_nurke.hotmail.com
Hi folks,
I'm implementing a text box. I have my drawing object underneath,
covered in one or more text objects for the paragraphs and other textual
components. I want the text objects' parts to defer to their parent
drawing object's part for most operations (resizing, moving), except
when I enter edit mode. In edit mode I want the text part's edit policy
to take effect.
I understand generally how the edit policies work but not how to control
them dynamically. How can I make the text parts "invisible" most of the
time so clicks and drag operations fall through to the parent part?
Thanks,
Fred
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| Re: Deferring editing to a different part [message #181706 is a reply to message #181595] |
Wed, 18 May 2005 17:29  |
| Eclipse User |
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Originally posted by: freddie_nurke.hotmail.com
I've overridden findFigureAt for the text object's figure so that in
read-only mode it doesn't search its children. I can now interact with
the object as a whole rather than the text contents of the object.
Now I need to figure out how to enter edit mode...
Thanks,
Fred
Fred Nurke wrote:
> Hi folks,
>
> I'm implementing a text box. I have my drawing object underneath,
> covered in one or more text objects for the paragraphs and other textual
> components. I want the text objects' parts to defer to their parent
> drawing object's part for most operations (resizing, moving), except
> when I enter edit mode. In edit mode I want the text part's edit policy
> to take effect.
>
> I understand generally how the edit policies work but not how to control
> them dynamically. How can I make the text parts "invisible" most of the
> time so clicks and drag operations fall through to the parent part?
>
> Thanks,
>
> Fred
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| Re: Deferring editing to a different part [message #181712 is a reply to message #181709] |
Thu, 19 May 2005 00:26 |
| Eclipse User |
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Originally posted by: freddie_nurke.hotmail.com
To clarify: the edit parts for the contents of the text box should
override getTargetEditPart (as opposed to the container's edit part)?
Thanks for your help,
Fred
Pratik Shah wrote:
> Instead, your EditPart should override getTargetEditPart() and return its
> parent when in read-only mode.
>
> "Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
> news:d6fu2l$e55$1@news.eclipse.org...
>
>>I've overridden findFigureAt for the text object's figure so that in
>>read-only mode it doesn't search its children. I can now interact with
>>the object as a whole rather than the text contents of the object.
>>
>>Now I need to figure out how to enter edit mode...
>>
>>Thanks,
>>
>>Fred
>>
>>Fred Nurke wrote:
>>
>>>Hi folks,
>>>
>>>I'm implementing a text box. I have my drawing object underneath,
>>>covered in one or more text objects for the paragraphs and other textual
>>>components. I want the text objects' parts to defer to their parent
>>>drawing object's part for most operations (resizing, moving), except
>>>when I enter edit mode. In edit mode I want the text part's edit policy
>>>to take effect.
>>>
>>>I understand generally how the edit policies work but not how to control
>>>them dynamically. How can I make the text parts "invisible" most of the
>>>time so clicks and drag operations fall through to the parent part?
>>>
>>>Thanks,
>>>
>>>Fred
>
>
>
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| Re: Deferring editing to a different part [message #181797 is a reply to message #181712] |
Thu, 19 May 2005 15:36 |
| Eclipse User |
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Originally posted by: none.us.ibm.com
Actually, if the child simply does not identify itself as the target, then
the targeting will fall through and the parent can identify itself as the
target insted.
So, you should return NULL if you are not targetable.
"Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
news:d6gmhq$b6o$1@news.eclipse.org...
> To clarify: the edit parts for the contents of the text box should
> override getTargetEditPart (as opposed to the container's edit part)?
>
> Thanks for your help,
>
> Fred
>
>
> Pratik Shah wrote:
>> Instead, your EditPart should override getTargetEditPart() and return its
>> parent when in read-only mode.
>>
>> "Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
>> news:d6fu2l$e55$1@news.eclipse.org...
>>
>>>I've overridden findFigureAt for the text object's figure so that in
>>>read-only mode it doesn't search its children. I can now interact with
>>>the object as a whole rather than the text contents of the object.
>>>
>>>Now I need to figure out how to enter edit mode...
>>>
>>>Thanks,
>>>
>>>Fred
>>>
>>>Fred Nurke wrote:
>>>
>>>>Hi folks,
>>>>
>>>>I'm implementing a text box. I have my drawing object underneath,
>>>>covered in one or more text objects for the paragraphs and other textual
>>>>components. I want the text objects' parts to defer to their parent
>>>>drawing object's part for most operations (resizing, moving), except
>>>>when I enter edit mode. In edit mode I want the text part's edit policy
>>>>to take effect.
>>>>
>>>>I understand generally how the edit policies work but not how to control
>>>>them dynamically. How can I make the text parts "invisible" most of the
>>>>time so clicks and drag operations fall through to the parent part?
>>>>
>>>>Thanks,
>>>>
>>>>Fred
>>
>>
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| Re: Deferring editing to a different part [message #181874 is a reply to message #181797] |
Thu, 19 May 2005 18:44 |
| Eclipse User |
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Originally posted by: freddie_nurke.hotmail.com
Hi Randy,
Unfortunately it doesn't seem to work that way. I overrode
getTargetEditPart in AbstractTextualPart, which is the top of the
hierarchy for the text parts. It now returns null. However, the
TargetingTool's updateTargetUnderMouse doesn't search deeply for the
target under the mouse:
protected boolean updateTargetUnderMouse() {
if (!isTargetLocked()) {
Collection exclude = getExclusionSet();
EditPart editPart = getCurrentViewer().findObjectAtExcluding(
getLocation(),
exclude,
getTargetingConditional());
if (editPart != null)
editPart = editPart.getTargetEditPart(getTargetRequest());
boolean changed = getTargetEditPart() != editPart;
setTargetEditPart(editPart);
return changed;
} else
return false;
}
As you can see, if getTargetEditPart for the editPart under the mouse
returns null, the target edit part is simply set to null, not to that
part's parent (or nth grandparent as appropriate).
If instead I make getTargetEditPart return
getParent().getTargetEditPart(), it seems to work. That's a lot cleaner
than overriding the Figure's findFigureAt, so I'll use it instead.
Thanks,
Fred
Randy Hudson wrote:
> Actually, if the child simply does not identify itself as the target, then
> the targeting will fall through and the parent can identify itself as the
> target insted.
>
> So, you should return NULL if you are not targetable.
>
> "Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
> news:d6gmhq$b6o$1@news.eclipse.org...
>
>>To clarify: the edit parts for the contents of the text box should
>>override getTargetEditPart (as opposed to the container's edit part)?
>>
>>Thanks for your help,
>>
>>Fred
>>
>>
>>Pratik Shah wrote:
>>
>>>Instead, your EditPart should override getTargetEditPart() and return its
>>>parent when in read-only mode.
>>>
>>>"Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
>>>news:d6fu2l$e55$1@news.eclipse.org...
>>>
>>>
>>>>I've overridden findFigureAt for the text object's figure so that in
>>>>read-only mode it doesn't search its children. I can now interact with
>>>>the object as a whole rather than the text contents of the object.
>>>>
>>>>Now I need to figure out how to enter edit mode...
>>>>
>>>>Thanks,
>>>>
>>>>Fred
>>>>
>>>>Fred Nurke wrote:
>>>>
>>>>
>>>>>Hi folks,
>>>>>
>>>>>I'm implementing a text box. I have my drawing object underneath,
>>>>>covered in one or more text objects for the paragraphs and other textual
>>>>>components. I want the text objects' parts to defer to their parent
>>>>>drawing object's part for most operations (resizing, moving), except
>>>>>when I enter edit mode. In edit mode I want the text part's edit policy
>>>>>to take effect.
>>>>>
>>>>>I understand generally how the edit policies work but not how to control
>>>>>them dynamically. How can I make the text parts "invisible" most of the
>>>>>time so clicks and drag operations fall through to the parent part?
>>>>>
>>>>>Thanks,
>>>>>
>>>>>Fred
>>>
>>>
>
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| Re: Deferring editing to a different part [message #182251 is a reply to message #181874] |
Mon, 23 May 2005 20:47 |
| Eclipse User |
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Originally posted by: none.us.ibm.com
It does search deeply. In fact, it searches deepest figures first.
Returning NULL higher up in the editpart parent chain does not prevent the
children from being seen. You need to dive into findObjectAtExcluding to
appreciate the targeting ;-)
For an example of how returning NULL works, try dragging a logic part on top
of another GATE or LED object. Those objects are not containers, so they
return NULL as the target of an ADD operations, which allows the parent to
be targeted. In fact, it doesn't even have to be a parent. It could be a
sibling which is behind the non-container in the Z-order.
"Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
news:d6imsc$ker$1@news.eclipse.org...
> Hi Randy,
>
> Unfortunately it doesn't seem to work that way. I overrode
> getTargetEditPart in AbstractTextualPart, which is the top of the
> hierarchy for the text parts. It now returns null. However, the
> TargetingTool's updateTargetUnderMouse doesn't search deeply for the
> target under the mouse:
>
> protected boolean updateTargetUnderMouse() {
> if (!isTargetLocked()) {
> Collection exclude = getExclusionSet();
> EditPart editPart = getCurrentViewer().findObjectAtExcluding(
> getLocation(),
> exclude,
> getTargetingConditional());
> if (editPart != null)
> editPart = editPart.getTargetEditPart(getTargetRequest());
> boolean changed = getTargetEditPart() != editPart;
> setTargetEditPart(editPart);
> return changed;
> } else
> return false;
> }
>
> As you can see, if getTargetEditPart for the editPart under the mouse
> returns null, the target edit part is simply set to null, not to that
> part's parent (or nth grandparent as appropriate).
>
> If instead I make getTargetEditPart return
> getParent().getTargetEditPart(), it seems to work. That's a lot cleaner
> than overriding the Figure's findFigureAt, so I'll use it instead.
>
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| Re: Deferring editing to a different part [message #182546 is a reply to message #182251] |
Wed, 25 May 2005 22:41 |
| Eclipse User |
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Originally posted by: freddie_nurke.hotmail.com
Hi Randy,
Thanks for your help. I ended up following through most of that code
and found the correct place to override getTargetEditPart. It's working
now.
Thanks,
Fred
Randy Hudson wrote:
> It does search deeply. In fact, it searches deepest figures first.
> Returning NULL higher up in the editpart parent chain does not prevent the
> children from being seen. You need to dive into findObjectAtExcluding to
> appreciate the targeting ;-)
>
> For an example of how returning NULL works, try dragging a logic part on top
> of another GATE or LED object. Those objects are not containers, so they
> return NULL as the target of an ADD operations, which allows the parent to
> be targeted. In fact, it doesn't even have to be a parent. It could be a
> sibling which is behind the non-container in the Z-order.
>
>
> "Fred Nurke" <freddie_nurke@hotmail.com> wrote in message
> news:d6imsc$ker$1@news.eclipse.org...
>
>>Hi Randy,
>>
>>Unfortunately it doesn't seem to work that way. I overrode
>>getTargetEditPart in AbstractTextualPart, which is the top of the
>>hierarchy for the text parts. It now returns null. However, the
>>TargetingTool's updateTargetUnderMouse doesn't search deeply for the
>>target under the mouse:
>>
>>protected boolean updateTargetUnderMouse() {
>>if (!isTargetLocked()) {
>>Collection exclude = getExclusionSet();
>>EditPart editPart = getCurrentViewer().findObjectAtExcluding(
>>getLocation(),
>>exclude,
>>getTargetingConditional());
>>if (editPart != null)
>>editPart = editPart.getTargetEditPart(getTargetRequest());
>>boolean changed = getTargetEditPart() != editPart;
>>setTargetEditPart(editPart);
>>return changed;
>>} else
>>return false;
>>}
>>
>>As you can see, if getTargetEditPart for the editPart under the mouse
>>returns null, the target edit part is simply set to null, not to that
>>part's parent (or nth grandparent as appropriate).
>>
>>If instead I make getTargetEditPart return
>>getParent().getTargetEditPart(), it seems to work. That's a lot cleaner
>>than overriding the Figure's findFigureAt, so I'll use it instead.
>>
>
>
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