I'm busy working on a Reaction-based UAE congifuration editor. I have a question for the developer community: How do you find out what font is used for gadgets? I need that to compute the size of buttons, list boxes, just about everything.

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@thinkchip

Quote:

I need that to compute the size of buttons, list boxes, just about everything.

No, you don't. ReAction does this for you.

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@thinkchip

As Thomas said ReAction / BOOPSI calculates these thngs for you, so what are you doing that makes you think you needto do it 'by hand'?

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@broadblues

I'd like some control over the format of my window. Anyway, it's just a question. I'm not trying to make a bomb or something.

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@thinkchip

Quote:

I'd like some control over the format of my window.

I think that once your gadgets become part of a layout, the size and position attribute tags that you OM_SET will be ignored, and all dimensions will be supplied by the controlling layout instead.

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@thinkchip

Quote:

I'd like some control over the format of my window.

You have alot of control over the window format / layout allready, perhapsgive us an example of what you are trying to do and we can advise on how to acheive it. It's not always obvious, and complex layouts often require nested layout gadgets.

Quote:

Anyway, it's just a question. I'm not trying to make a bomb or something.

Ofcourse, my question is to find out what you are wanting to do, so as to explain how to acheive it better.

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@thinkchip

Quote:

thinkchip wrote: @broadblues I'd like some control over the format of my window. Anyway, it's just a question. I'm not trying to make a bomb or something.

You can set the size of the window with WA_Width and WA_Height. Everything else should be done with CHILD_WeightedWidth, CHILD_WeightedHeight and CHILD_WeightMinimun.

I don't think there is a legal way to find out the font used for ReAction elements. And like already mentioned, there is no way to set the absolute size of a GUI element anyway.

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@Trixie

Quote:

I think that once your gadgets become part of a layout, the size and position attribute tags that you OM_SET will be ignored, and all dimensions will be supplied by the controlling layout instead.

Usually yes, but in special circumstances you can use

      LAYOUT_NoLayout (BOOL) (V45)
        Do not layout the children. All children must have valid
        coordinates. Cannot be used with weight bars.

        Defaults to FALSE.

        Applicability is (OM_NEW, OM_SET, OM_GET)

Last edited by broadblues on 19-May-2013 at 02:46 PM.

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@broadblues

I have a list browser that will be used to select the main program functions, there are about twenty of them. It looks like it will do what I need. But I don't want it to change size when you resize the window and it has to all be visible all the time. (I know somebody won't be happy if they can't resize the window.)

If you do something like this, the size of the list box can't change.

LayoutObject,
LAYOUT_AddChild, ListBrowserObject,
(list browser definition)
End,
CHILD_MaxWidth, xsize,
CHILD_MinWidth, xsize,
CHILD_MaxHeight, ysize,
CHILD_MinHeight, ysize,
(more stuff)

If you know the font you can calculate the size of the box you need in pixels. That would be xsize and ysize. I don't think it matters if the other stuff moves around and changes size.

Last edited by thinkchip on 20-May-2013 at 03:40 AM.

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@thinkchip
Maybe something like:

result = GetGUIAttrs(NULL, myDrawInfo, GUIA_GadgetTextAttr, &myTextAttr, TAG_END);

would be useful?

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@thinkchip

CHILD_WeightedWidth,0,

should take care of that. Without you needing to calculate anything yourself.

Possibly in combination with CHILD_NominalSize,TRUE,

Last edited by broadblues on 20-May-2013 at 08:45 PM.

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@broadblues

BTW if you must use

CHILD_MinWidth,width,
CHILD_MAxWidth,width,

dont.

Instead, do


CHILD_MinWidth,width,
CHILD_WeightedWidth,0,

same effect but more efficient.

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@thinkchip

Another question: If you do a "DisposeObject(*object)" on a window object, does it automatically dispose of layout objects and gadget objects that are attached to it? If it does, it would save me a lot of bother.

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@thinkchip
Quote:

Another question: If you do a "DisposeObject(*object)" on a window object, does it automatically dispose of layout objects and gadget objects that are attached to it? If it does, it would save me a lot of bother.

Yes it does. Strictly speaking it disposes of the top level layout gadget, then that gadget disposes of any children it has, and so on.

In special cases you can mark child objects to be *not* disposed off, with the CHILD_NoDispose (think I got the name right) tag.

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@thread

Another question related to the last one:

You can change the layout of the window by doing this:

result = IIntuition->SetAttrs(objects[OID_WINDOW], WINDOW_Layout, newlayoutobject, TAG_END);

Does it do a "dispose object" on the old layout object (along with all of the attached stuff)? Is this a good way to do it?

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@thinkchip

Quote:

You can change the layout of the window by doing this: result = IIntuition->SetAttrs(objects[OID_WINDOW], WINDOW_Layout, newlayoutobject, TAG_END); Does it do a "dispose object" on the old layout object (along with all of the attached stuff)? Is this a good way to do it?

I don't know if it does or not. The autodocs don;t say that it does, so intialy I would assume it doesn't.

You could always test this by creating a window, adding alayout, removing it, then disposing of the layout. If it's been disposed of allready it will crash pretty quickly!

However I wouldn't use that approach, the safer way to modify window contants (whilst the window is open) is add a containing top level layout, then use the methods LM_ADDCHILD, LM_MODIFYCHILD LM_REMOVECHILD etc to safely add or replace your actual dynamic layouts.

Also consider page.gadget

To give more specific advice, I'd need nmore details on why you want to swap window layouts, and how you want it to work. Is it create pages?

Last edited by broadblues on 30-May-2013 at 10:58 PM.

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@thread

I need a Reaction slider gadget to control the E-UAE floppy emulation speed (among other things). Next to it I want a text field that shows the current setting as you slide the gadget back and forth. According to my research, you need a hook for this. There are facets of this that aren't really obvious. I wonder if somebody could point me to a programming example.

Regarding the previous discussion: I haven't been able to get the Reaction gadget font. Like somebody said, it might not be possible. However, there are other ways to do what I wanted to do.

Last edited by thinkchip on 11-Jun-2013 at 10:46 AM.

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@thinkchip

Quote:

I need a Reaction slider gadget to control the E-UAE floppy emulation speed (among other things). Next to it I want a text field that shows the current setting as you slide the gadget back and forth. According to my research, you need a hook for this.

No, you normally don't need a hook for that. You need to specify SLIDER_LevelFormat with a C-style formatting string, and SLIDER_LevelMaxLen with the maximum length (in characters) of the displayed value (the default is 3). For example, to display an integer value next to the slider you'd specify

SLIDER_LevelFormat, "%ld",

in your slider gadget definition. If you want to display a numeric value together with a unit, you can also do that through the formatting string:

SLIDER_LevelFormat, "%ld sec.",

Displaying string values is also possible:

SLIDER_LevelFormat, "%s",

but as the slider only works with integer values, you'll need to setup a hook to convert the number into the string.

Last edited by Trixie on 11-Jun-2013 at 11:25 AM.
Last edited by Trixie on 11-Jun-2013 at 11:08 AM.

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@thread

This is a question involving program performance. When my UAE configuration editor EasyUAE is running, the computer slows down like EasyUAE is busy doing something. Does IDoMethod(object, WM_HANDLEINPUT, mess) stop and wait or does it skip by if there isn't a message? Any idea why the code below would gobble CPU cycles and how it could be improved?

while(!endit)
{
result = IIntuition->IDoMethod(objects[OID_WINDOW], WM_HANDLEINPUT, &messg);
gadid = result & WMHI_GADGETMASK;
result &= WMHI_CLASSMASK;
if(result == WMHI_CLOSEWINDOW)
{
endit = TRUE;
}
else if(result == WMHI_GADGETUP)
{
if(gadid >= FLP_CHECK1 && gadid = HD_LIST && gadid

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@thinkchip

Quote:

Does IDoMethod(object, WM_HANDLEINPUT, mess) stop and wait or does it skip by if there isn't a message?

WM_HANDLEINPUT returns immediately if there is nothing to do. You have to Wait() for the signals returned by GetAttr(WINDOW_SigMask).

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