NSButton Subclass - 2 states plus tracking image
-
I need an NSButton with 5 different graphics and two states:
State 0 (enabled & disabled graphics)
State 1 (enabled & disabled graphics)
Pressed/Tracking state
I was thinking to subclass NSButton and in IB use "Momentary Change" so that
I can set the alt image to always be my Pressed/Tracking state and the
subclass will change the main image to one of the other 4 images as needed.
The problem I see is that Momentary Change buttons are really single state
so I think my action method for the button would have to also toggle a value
variable and I may need to override value/setValue to use my custom value.
If I set up a two state button, how can I provide a custom tracking image...
Eg when drawRect is called, how can I tell that my button is being pressed
and tracked?
Is there an existing class out there that will just do this? I haven't come
across one.
Thanks,
Trygve -
Hi Trygve,
I don't you should override -value or anything like that. NSOnState
and NSOffState should do fine.
You should draw your pressed art if and only if -isHighlighted is true.
It's probably appropriate to subclass NSButtonCell for this and draw
what you like. In IB3, you can select the cell from a button and
choose a custom subclass.
Concerning what to override, -drawWithFrame:inView: is the top level
drawing method for cells, the analog of -drawRect:. -
drawBezelWithFrame:inView: is called from -drawWithFrame:inView:, and
is used to draw the part of a button that interior text and images sit
on. This the glassy looking part of a standard aqua push button, for
example. Finally, -drawInteriorWithFrame:inView: is also called from -
drawWithFrame:inView:, and this method draws the text and/or images
that sit on top of the bezel.
-Ken
On Feb 23, 2008, at 4:19 AM, Trygve Inda <cocoa...> wrote:> I need an NSButton with 5 different graphics and two states:
>
> State 0 (enabled & disabled graphics)
> State 1 (enabled & disabled graphics)
> Pressed/Tracking state
>
> I was thinking to subclass NSButton and in IB use "Momentary Change"
> so that
> I can set the alt image to always be my Pressed/Tracking state and the
> subclass will change the main image to one of the other 4 images as
> needed.
>
> The problem I see is that Momentary Change buttons are really single
> state
> so I think my action method for the button would have to also toggle
> a value
> variable and I may need to override value/setValue to use my custom
> value.
>
> If I set up a two state button, how can I provide a custom tracking
> image...
> Eg when drawRect is called, how can I tell that my button is being
> pressed
> and tracked?
>
> Is there an existing class out there that will just do this? I
> haven't come
> across one.
>
> Thanks,
>
> Trygve -
> Hi Trygve,
>
> I don't you should override -value or anything like that. NSOnState
> and NSOffState should do fine.
>
> You should draw your pressed art if and only if -isHighlighted is true.
>
> It's probably appropriate to subclass NSButtonCell for this and draw
> what you like. In IB3, you can select the cell from a button and
> choose a custom subclass.
>
> Concerning what to override, -drawWithFrame:inView: is the top level
> drawing method for cells, the analog of -drawRect:. -
> drawBezelWithFrame:inView: is called from -drawWithFrame:inView:, and
> is used to draw the part of a button that interior text and images sit
> on. This the glassy looking part of a standard aqua push button, for
> example. Finally, -drawInteriorWithFrame:inView: is also called from -
> drawWithFrame:inView:, and this method draws the text and/or images
> that sit on top of the bezel.
>
> -Ken
How is best to do this in Tiger with IB2?
T -
Subclass NSButton and override the -initWithCoder: method. After
calling super's implementation, replace the cell with one of your
custom class.
Mike.
On 23 Feb 2008, at 23:02, Trygve Inda wrote:>> Hi Trygve,
>>
>> I don't you should override -value or anything like that. NSOnState
>> and NSOffState should do fine.
>>
>> You should draw your pressed art if and only if -isHighlighted is
>> true.
>>
>> It's probably appropriate to subclass NSButtonCell for this and draw
>> what you like. In IB3, you can select the cell from a button and
>> choose a custom subclass.
>>
>> Concerning what to override, -drawWithFrame:inView: is the top level
>> drawing method for cells, the analog of -drawRect:. -
>> drawBezelWithFrame:inView: is called from -drawWithFrame:inView:, and
>> is used to draw the part of a button that interior text and images
>> sit
>> on. This the glassy looking part of a standard aqua push button, for
>> example. Finally, -drawInteriorWithFrame:inView: is also called
>> from -
>> drawWithFrame:inView:, and this method draws the text and/or images
>> that sit on top of the bezel.
>>
>> -Ken
>
> How is best to do this in Tiger with IB2?
>
> T
