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Aminet 33
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Aminet 33 - October 1999.iso
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Tools
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ClassAct
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Examples
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Chooser
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hiddenchooser.c
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C/C++ Source or Header
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1997-04-27
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;/* Hidden Chooser Example
sc link hiddenchooser.c lib lib:classact.lib
quit
*/
/** This example demonstrates the "hidden mode" mode of the chooser gadget.
**
** It is a NEW mode added recently to ClassAct release 2.0 - you *must*
** have atleast V41.101 or later installed. Officially, this is a V42
** ClassAct 2.1 feature, but made available now due to developer demand.
**
** Hidden choosers currently need to be handled differently than visible
** gadget objects. Since they are NOT added to the window, or layout group,
** they do not trigger a GADGETUP. So, you must use an IDCMPUPDATE hook
** and use the CHOOSER_Active notifications to get the selection.
**/
#define USE_BUILTIN_MATH
#define USE_SYSBASE
#include <stdio.h>
#include <string.h>
#include <math.h>
#define INTUI_V36_NAMES_ONLY
#include <exec/types.h>
#include <exec/memory.h>
#include <dos/dos.h>
#include <dos/dosextens.h>
#include <intuition/intuition.h>
#include <intuition/gadgetclass.h>
#include <intuition/intuitionbase.h>
#include <intuition/classusr.h>
#include <intuition/imageclass.h>
#include <intuition/gadgetclass.h>
#include <intuition/icclass.h>
#include <intuition/cghooks.h>
#include <intuition/classes.h>
#include <graphics/gfxbase.h>
#include <graphics/text.h>
#include <graphics/gfxmacros.h>
#include <utility/tagitem.h>
#include <utility/hooks.h>
#include <clib/macros.h>
#include <proto/intuition.h>
#include <proto/graphics.h>
#include <proto/dos.h>
#include <proto/exec.h>
#include <proto/utility.h>
#include <classact.h>
#define ID_BUTTON 1
#define ID_HIDDEN 2
/* Labels for the popup.
*/
UBYTE *chooser_strs[] =
{
"Save Image",
"Load Image",
"Follow URL",
"Save to HotList",
NULL
};
/*************************************************************************
* IDCMP hook
*/
void __asm __saveds IDCMPFunc( register __a0 struct Hook *Hook,
register __a2 Object *Window,
register __a1 struct IntuiMessage *Msg )
{
ULONG active;
if (Msg->Class == IDCMP_IDCMPUPDATE)
{
/* The notification might include one of the tags we want to look at...
*/
if (GetTagData(GA_ID, 0, Msg->IAddress) == ID_HIDDEN)
{
active = GetTagData(CHOOSER_Active, -1, Msg->IAddress);
printf("active: %ld\n", active);
}
}
}
int main( int argc, char *argv[] )
{
if (ButtonBase)
{
Object *Chooser_Object_Hidden;
Object *Window_Object;
struct Window *window;
struct List *chooserlist;
struct Hook idcmphook;
idcmphook.h_Entry = (ULONG (* )())IDCMPFunc;
idcmphook.h_SubEntry = NULL;
chooserlist = ChooserLabelsA(chooser_strs);
if (chooserlist)
{
/* Create an instance of the chooser class that will remain hidden.
*/
Chooser_Object_Hidden = ChooserObject,
GA_RelVerify, TRUE,
GA_ID, ID_HIDDEN,
CHOOSER_Labels, chooserlist,
CHOOSER_DropDown, TRUE,
CHOOSER_AutoFit, TRUE,
CHOOSER_Hidden, TRUE,
ICA_TARGET, ICTARGET_IDCMP,
ChooserEnd;
/* Create the window object. */
Window_Object = WindowObject,
WA_ScreenTitle, "ClassAct Release 2.0",
WA_Title, "Another ClassAct chooser.gadget Example",
WA_SizeGadget, TRUE,
WA_Left, 40,
WA_Top, 30,
WA_DepthGadget, TRUE,
WA_DragBar, TRUE,
WA_CloseGadget, TRUE,
WA_Activate, TRUE,
WA_SmartRefresh, TRUE,
WA_IDCMP, IDCMP_GADGETUP|IDCMP_GADGETDOWN|IDCMP_IDCMPUPDATE,
WINDOW_IDCMPHook, &idcmphook, /* For BOOPSI notification */
WINDOW_IDCMPHookBits, IDCMP_IDCMPUPDATE,
WINDOW_ParentGroup, VGroupObject,
LAYOUT_SpaceOuter, TRUE,
LAYOUT_DeferLayout, TRUE,
LAYOUT_AddChild, ButtonObject,
GA_RelVerify, TRUE,
GA_ID, ID_BUTTON,
GA_Text, "Press me to show the hidden chooser!",
ButtonEnd,
CHILD_WeightedHeight, 0,
LAYOUT_AddChild, VGroupObject,
CLASSACT_BackFill, NULL,
LAYOUT_SpaceOuter, TRUE,
LAYOUT_VertAlignment, LALIGN_CENTER,
LAYOUT_HorizAlignment, LALIGN_CENTER,
LAYOUT_BevelStyle, BVS_FIELD,
LAYOUT_AddImage, LabelObject,
LABEL_Text, "Selecting the button above will\n",
LABEL_Text, "reveal the hidden popup chooser!\n\n",
LABEL_Text, "Hidden choosers are useful for\n",
LABEL_Text, "context sensitive quick menus.\n",
LabelEnd,
LayoutEnd,
LayoutEnd,
WindowEnd;
/* Object creation sucessful?
*/
if( Window_Object )
{
/* Open the window.
*/
if( window = (struct Window *) CA_OpenWindow(Window_Object) )
{
ULONG wait, signal, result, done = FALSE;
WORD Code;
/* Obtain the window wait signal mask.
*/
GetAttr( WINDOW_SigMask, Window_Object, &signal );
/* Input Event Loop
*/
while( !done )
{
wait = Wait(signal|SIGBREAKF_CTRL_C);
if (wait & SIGBREAKF_CTRL_C) done = TRUE;
else
while ((result = CA_HandleInput(Window_Object,&Code)) != WMHI_LASTMSG)
{
switch (result & WMHI_CLASSMASK)
{
case WMHI_CLOSEWINDOW:
done = TRUE;
break;
case WMHI_GADGETUP:
switch(result & WMHI_GADGETMASK)
{
case ID_BUTTON:
ActivateGadget((struct Gadget *)Chooser_Object_Hidden, window, NULL);
break;
}
break;
}
}
}
}
/* Disposing of the window object will also close the window if it is
* already opened and it will dispose of all objects attached to it.
*/
DisposeObject( Window_Object );
/* The hidden chooser isn't attached to anything, so we must dispose
* it ourselves...
*/
DisposeObject( Chooser_Object_Hidden );
}
}
FreeChooserLabels(chooserlist);
}
}