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- /*
- ** Demosource on how to use customclasses in E.
- ** Based on the C example 'Class2.c' by Stafan Stuntz.
- ** Translated TO E by Sven Steiniger
- **
- ** Sorry FOR some uppercase words in the comments. This IS because OF
- ** my AutoCase-dictionary
- */
-
- OPT PREPROCESS
-
- MODULE 'muimaster','libraries/mui','libraries/muip',
- 'intuition/classes','intuition/classusr','intuition/screens','intuition/intuition',
- 'utility','utility/tagitem',
- 'amigalib/boopsi',
- 'mui/muicustomclass'
-
- /***************************************************************************/
- /* Here is the beginning of our simple new class... */
- /***************************************************************************/
-
- /*
- ** This class is the same as within Class1.c except that it features
- ** a pen attribute.
- */
-
- OBJECT mydata
- penspec:mui_penspec
- pen:LONG
- penchange
- ENDOBJECT
-
- CONST MYATTR_PEN=$8022 /* tag value for the new attribute. */
-
-
- PROC mNew(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO opset)
- DEF data:PTR TO mydata,
- tags:PTR TO tagitem,
- tag:PTR TO tagitem
-
- IF (obj:=doSuperMethodA(cl,obj,msg))=NIL THEN RETURN 0
-
- data:=INST_DATA(cl,obj)
-
- /* parse initial taglist */
- tags:=msg.attrlist
- WHILE tag:=NextTagItem({tags})
- IF tag.tag=MYATTR_PEN THEN
- IF tag.data THEN CopyMem(tag.data,data.penspec,SIZEOF mui_penspec)
- ENDWHILE
-
- ENDPROC obj
-
-
- /* OM_NEW didnt allocates something, just DO nothing here... */
-
- PROC mDispose(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO msg) IS
- doSuperMethodA(cl,obj,msg)
-
-
- PROC mSet(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO opset)
- DEF data:PTR TO mydata,
- tags:PTR TO tagitem,
- tag:PTR TO tagitem
-
- data:=INST_DATA(cl,obj)
- tags:=msg.attrlist
- WHILE tag:=NextTagItem({tags})
- IF tag.tag=MYATTR_PEN THEN
- IF tag.data
- CopyMem(tag.data,data.penspec,SIZEOF mui_penspec)
- data.penchange:=TRUE
- Mui_Redraw(obj,MADF_DRAWOBJECT) /* redraw ourselves completely */
- ENDIF
- ENDWHILE
-
- ENDPROC doSuperMethodA(cl,obj,msg)
-
-
- /*
- ** OM_GET method, see if someone wants to read the color.
- */
-
- PROC mGet(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO opget)
- DEF data:PTR TO mydata,storage
-
- IF msg.attrid=MYATTR_PEN
- data:=INST_DATA(cl,obj)
- storage:=msg.storage
- ^storage:=data.penspec
- RETURN MUI_TRUE
- ENDIF
-
- ENDPROC doSuperMethodA(cl,obj,msg)
-
-
- PROC mSetup(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO msg)
- DEF data:PTR TO mydata
-
- IF doSuperMethodA(cl,obj,msg)=FALSE THEN RETURN FALSE
- data:=INST_DATA(cl,obj)
- data.pen:=Mui_ObtainPen(muiRenderInfo(obj),data.penspec,0)
-
- ENDPROC MUI_TRUE
-
-
- PROC mCleanup(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO msg)
- DEF data:PTR TO mydata
-
- data:=INST_DATA(cl,obj)
- Mui_ReleasePen(muiRenderInfo(obj),data.pen)
-
- ENDPROC doSuperMethodA(cl,obj,msg)
-
-
- /*
- ** AskMinMax method will be called before the window is opened
- ** and before layout takes place. We need to tell MUI the
- ** minimum, maximum and default size of our object.
- */
-
- PROC mAskMinMax(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO muip_askminmax)
-
- /*
- ** let our superclass first fill in what it thinks about sizes.
- ** this will e.g. add the size OF frame and inner spacing.
- */
-
- doSuperMethodA(cl,obj,msg)
-
- /*
- ** now add the values specific TO our object. note that we
- ** indeed need TO *add* these values, not just set them!
- */
-
- msg.minmaxinfo.minwidth := msg.minmaxinfo.minwidth + 100
- msg.minmaxinfo.defwidth := msg.minmaxinfo.defwidth + 120
- msg.minmaxinfo.maxwidth := msg.minmaxinfo.maxwidth + 500
-
- msg.minmaxinfo.minheight := msg.minmaxinfo.minheight + 40
- msg.minmaxinfo.defheight := msg.minmaxinfo.defheight + 90
- msg.minmaxinfo.maxheight := msg.minmaxinfo.maxheight + 300
-
- ENDPROC 0
-
-
- /*
- ** Draw method is called whenever MUI feels we should render
- ** our object. This usually happens after layout is finished
- ** or when we need to refresh in a simplerefresh window.
- ** Note: You may only render within the rectangle
- ** _mleft(obj), _mtop(obj), _mwidth(obj), _mheight(obj).
- */
-
- PROC mDraw(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO muip_draw)
- DEF data:PTR TO mydata,
- i
-
- data:=INST_DATA(cl,obj)
-
- /*
- ** let our superclass draw itself first, area class would
- ** e.g. draw the frame and clear the whole region. What
- ** it does exactly depends on msg.flags.
- */
-
- doSuperMethodA(cl,obj,msg)
-
- /*
- ** IF MADF_DRAWOBJECT isn't set, we shouldn't draw anything.
- ** MUI just wanted TO update the frame OR something like that.
- */
-
- IF (msg.flags AND MADF_DRAWOBJECT)=0 THEN RETURN 0
-
- /*
- ** test IF someone changed our pen
- */
-
- IF data.penchange
- data.penchange:=FALSE
- Mui_ReleasePen(muiRenderInfo(obj),data.pen)
- data.pen:=Mui_ObtainPen(muiRenderInfo(obj),data.penspec,0)
- ENDIF
-
-
- /*
- ** ok, everything ready TO render...
- ** Note that we *must* use the MUIPEN() macro before actually
- ** using pens from MUI_ObtainPen() in rendering calls.
- */
-
- SetAPen(_rp(obj),MUIPEN(data.pen))
-
- FOR i:=_mleft(obj) TO _mright(obj) STEP 5
- Move(_rp(obj),_mleft(obj),_mbottom(obj))
- Draw(_rp(obj),i,_mtop(obj))
- Move(_rp(obj),_mright(obj),_mbottom(obj))
- Draw(_rp(obj),i,_mtop(obj))
- ENDFOR
-
- ENDPROC 0
-
-
- /*
- ** Here comes the dispatcher FOR our custom class.
- ** Unknown/unused methods are passed to the superclass immediately.
- */
-
- PROC myDispatcher(cl:PTR TO iclass,obj:PTR TO object,msg:PTR TO msg)
- DEF methodID
-
- methodID:=msg.methodid
- SELECT methodID
- CASE OM_NEW ; RETURN mNew (cl,obj,msg)
- CASE OM_DISPOSE ; RETURN mDispose (cl,obj,msg)
- CASE OM_SET ; RETURN mSet (cl,obj,msg)
- CASE OM_GET ; RETURN mGet (cl,obj,msg)
- CASE MUIM_AskMinMax ; RETURN mAskMinMax(cl,obj,msg)
- CASE MUIM_Setup ; RETURN mSetup (cl,obj,msg)
- CASE MUIM_Cleanup ; RETURN mCleanup (cl,obj,msg)
- CASE MUIM_Draw ; RETURN mDraw (cl,obj,msg)
- ENDSELECT
-
- ENDPROC doSuperMethodA(cl,obj,msg)
-
-
-
- /***************************************************************************/
- /* Thats all there is about it. Now lets see how things are used... */
- /***************************************************************************/
-
- PROC main() HANDLE
- DEF app=NIL,window,myobj,pen,
- mcc=NIL:PTR TO mui_customclass,
- startpen:PTR TO mui_penspec,
- sigs=0
-
- IF (muimasterbase:=OpenLibrary(MUIMASTER_NAME, MUIMASTER_VMIN))=NIL THEN
- Raise('Failed TO open muimaster.library')
-
- /*
- ** open utility.library, because we need function NextTagItem()
- */
- IF (utilitybase:=OpenLibrary('utility.library',36))=NIL THEN
- Raise('Failed TO open utility.library')
-
-
- /* Create the NEW custom class with a call TO MUI_CreateCustomClass(). */
- /* Caution: This function returns not a struct IClass, BUT a */
- /* struct MUI_CustomClass which contains a struct IClass TO be */
- /* used with NewObject() calls. */
- /* Note well: MUI creates the dispatcher hook FOR you, you may */
- /* *not* use its h_Data field! IF you need custom data, use the */
- /* cl_UserData OF the IClass structure! */
-
- /* E-note: Create the NEW custom class with a call TO eMui_CreateCustomClass().*/
- /* Big thanks TO Jan Hendrik Schulz FOR creating eMui_CreateCustomClass() */
-
- IF (mcc:=eMui_CreateCustomClass(NIL,MUIC_Area,NIL,SIZEOF mydata,{myDispatcher}))=NIL THEN
- Raise('Could not create custom class.')
-
- app:=ApplicationObject,
- MUIA_Application_Title , 'Class2',
- MUIA_Application_Version , '$VER: Class2 12.9 (21.11.95)',
- MUIA_Application_Copyright , '©1995, Stefan Stuntz',
- MUIA_Application_Author , 'Stefan Stuntz',
- MUIA_Application_Description, 'Demonstrate the use OF custom classes.',
- MUIA_Application_Base , 'CLASS2',
-
- SubWindow, window:=WindowObject,
- MUIA_Window_Title, 'Another Custom Class',
- MUIA_Window_ID , "CLS2",
- WindowContents, VGroup,
-
- Child, TextObject,
- TextFrame,
- MUIA_Background, MUII_TextBack,
- -> E-note : center this text means inserting a <ESC c> which IS usually \ec
- MUIA_Text_Contents, '\ecThis IS a custom class with attributes.\nClick on the button at the bottom of\nthe window TO adjust the color.',
- End,
-
- Child, myobj:=NewObjectA(mcc.mcc_class,NIL,
- [TextFrame,
- MUIA_Background, MUII_BACKGROUND,
- TAG_DONE,0]),
-
- Child, HGroup, MUIA_Weight, 10,
- Child, FreeLabel('Custom Class Color:'),
- Child, pen:=PoppenObject,
- MUIA_CycleChain, 1,
- MUIA_Window_Title, 'Custom Class Color',
- End,
- End,
-
- End,
-
- End,
- End
-
- IF app=NIL THEN Raise('Failed to create Application.')
-
- doMethodA(window,[MUIM_Notify,MUIA_Window_CloseRequest,MUI_TRUE,
- app,2,MUIM_Application_ReturnID,MUIV_Application_ReturnID_Quit])
-
- doMethodA(pen,[MUIM_Notify,MUIA_Pendisplay_Spec,MUIV_EveryTime,
- myobj,3,MUIM_Set,MYATTR_PEN,MUIV_TriggerValue])
-
- get(pen,MUIA_Pendisplay_Spec,{startpen})
- set(myobj,MYATTR_PEN,startpen)
-
- /*
- ** This is the ideal input loop for an object oriented MUI application.
- ** Everything is encapsulated in classes, no return ids need to be used,
- ** we just check if the program shall terminate.
- ** Note that MUIM_Application_NewInput expects sigs to contain the result
- ** from Wait() (or 0). This makes the input loop significantly faster.
- */
-
- set(window,MUIA_Window_Open,MUI_TRUE)
-
- WHILE Not(doMethodA(app,[MUIM_Application_NewInput,{sigs}]) = MUIV_Application_ReturnID_Quit)
- IF sigs THEN sigs := Wait(sigs)
- ENDWHILE
-
- set(window,MUIA_Window_Open,FALSE)
-
- /*
- ** Shut down...
- */
-
- EXCEPT DO
- IF app THEN Mui_DisposeObject(app) /* dispose all objects. */
- IF mcc THEN Mui_DeleteCustomClass(mcc) /* delete the custom class. */
- IF utilitybase THEN CloseLibrary(utilitybase)
- IF muimasterbase THEN CloseLibrary(muimasterbase) /* close library */
- IF exception THEN WriteF('\s\n',exception)
- ENDPROC
-
-