Converting Input screen from non-clickable to clickable
1, Indroduction.
A simplified explanation of how the original program work was show in following diagram,
As shown in the diagram, we create a edit field for field 1, then after the user finish editing it we remove it. In other words, at any instance only one edit field was presented, the other field which look like a edit field is actually a label which look like a edit field. So that is why clicking on the other fields will not work.
To be able to have a clickable program , we must have every edit field present the same time. Following is a simplified version of what is going on when the program was converted.
The main different between the old way and the new way, is how we process the field list. As explain above, the old way put a field immediately on the screen when going through the field list. The new way instead of showing it straight the way, we allocate the field to a parameter dialogue box which will be shown once every field was added to the box. When we show the dialogue box, it will contain all the fields. So the user can click amount the fields.
2, Overview of the convertion.
currently the following types of program can be converted.
- lstr
- rep
- cont
to convert any of these program invlove the following step
- declear the program use the clickable dialogue.
- convert the s_flddes / s_outflddes lists
- implement the "paramctl()" function.
3, declear using clickable dialogue.
since we cannot convert all the program in the same time so we need a way to define which program is clickable and which program is not.
To declear a program is clickable simply set the global variable "guiparamready" to YES in the spclinit() function, the spclinit() function get run in the very beginning of the run time.
following is an example
spclinit()
{
IMPORT BOOL guiparamready;
guiparamready = YES;
}
4, convert the s_flddes lists
converting rep and lstr programs
in rep and lstr type of program , we normally have one page for inputs, if more then one list exist need to combine them into one.
converting cont programs
in cont programs we will have multiple pages, due to historical reason each page will have 2 fields lists one for labels and one for input fields.
following are the definition of a nonclickable program field lists
GLOBAL COUNT nscrn = 2;//number of pages
GLOBAL struct s_outflddes *scrnarray[] = {NULL, scrn, scrn2};//labels list for each page
GLOBAL struct s_flddes *procarray[] = {NULL, flds, flds2};//inputs list for each page
GLOBAL struct s_outflddes scrn[] =
{
{0,COMPUTE,COMPARE,0,"",&Debug,NORECBUF,INTEGER,INTEGER|CONSTANT,YES},
{IF_EQUAL,OUTPUT, 4,OCOL1,"58t.'auto-allocate unallocated amounts when posting trans'' :'"},
{0,OUTPUT, LINE+1,OCOL1,"58t.'default period - week/month (W/M)'' :'"},
{0,OUTPUT, LINE+1,OCOL1,"58t.'use private customer group'' :'"},
{0,OUTPUT, LINE+1,OCOL1,"58t.'customer lookups by contact details'' :'"},
{0,NULL},
} ;
GLOBAL struct s_flddes flds[] =
{
{0,COMPUTE,COMPARE,0,"",&Debug,NORECBUF,INTEGER,INTEGER|CONSTANT,YES},
{IF_EQUAL,EDIT,4 ,ICOL1,"yn", OFFSET(s_drcont, dissct), CONTROL, CHAR},
{0,EDIT|SPECIAL,LINE+1,ICOL1,"mw", OFFSET(s_drcont, defper), CONTROL, CHAR,0,0,0,0,speclfunc},
{0,EDIT,LINE+1,ICOL1,"yn", OFFSET(s_drcont, priv_grp), CONTROL, CHAR},
{0,EDIT,LINE+1,ICOL1,"yn", OFFSET(s_drcont, use_contact), CONTROL, CHAR},
{0,NULL},
} ;
GLOBAL struct s_outflddes scrn[] =
{
//something
.......
.......
} ;
GLOBAL struct s_flddes flds[] =
{
//something
......
......
} ;the above example define a cont program contain 2 pages and their fields lists before the clickable conversion.
note that the page start at array[1].
to convert do the following
- convert all the LINE+1 to actual numbers
- convert all the OUTPUT flagts to DISPLAY
- only reserve the lines which is either DISPLAY or EDIT or INPUT
- remove all the SPECIAL flags and special functions is exist
- zero all the IF_*, CONT, flags
- assign the handle number so later can identify a paticular field in the list.
using the above fist page as example the following is the code after conversion.
GLOBAL struct s_outflddes scrn[] =
{
{1,DISPLAY, 4,OCOL1,"58t.'auto-allocate unallocated amounts when posting trans'' :'"},
{2,DISPLAY, 5,OCOL1,"58t.'default period - week/month (W/M)'' :'"},
{3,DISPLAY, 6,OCOL1,"58t.'use private customer group'' :'"},
{4,DISPLAY, 7,OCOL1,"58t.'customer lookups by contact details'' :'"},
{0,NULL},
} ;
GLOBAL struct s_flddes flds[] =
{
{1,EDIT,4 ,ICOL1,"yn", OFFSET(s_drcont, dissct), CONTROL, CHAR},
{2,EDIT,5,ICOL1,"mw", OFFSET(s_drcont, defper), CONTROL, CHAR},
{3,EDIT,6,ICOL1,"yn", OFFSET(s_drcont, priv_grp), CONTROL, CHAR},
{4,EDIT,7,ICOL1,"yn", OFFSET(s_drcont, use_contact), CONTROL, CHAR},
{0,NULL},
} ;
5, implement the paramctl()
following is a template for the paramctl() function.
BOOL
paramctl(int act, int promptnum)
{
if(act == GUIP_UPBUF)
{
IMPORT TEXT last_entered_txt[80];
IMPORT TEXT last_field_txt[80];
switch(promptnum)
{
default:
break;
}
}
else if(act == GUIP_CHKSHW)
{
IMPORT TEXT last_prompt_txt[80];
switch(promptnum)
{
default:
break;
}
}
else if(act == GUIP_CHKEND)
{
}
return YES;
}
parameters
promptnum -- the field we are referring to. act -- what the function is currently used for.
GUIP_UPBUF -- required action after finish edit a input fields.
- GUIP_CHKSHW -- determine if fields should be shown.
- GUIP_CHKEND -- required action when exiting the dialogue.
return values
GUIP_UPBUF YES -- move to next field NO -- stay in the current field 2 -- exit the dialog immediately GUIP_CHKSHW YES -- we will show the fields. NO -- we will not show the fields. 2 -- if the fields has a label, display the string stored in last_prompt_txt as label text. GUIP_CHKEND YES -- we can safely exit and close the dialog NO -- cannot close the dialog , remain in the dialog.
Global Variable
GUIP_UPBUF last_field_txt[80] -- the text of the field when user focus in the field. last_entered_txt[80] -- the text of the field when user focus out the field. GUIP_CHKEND last_prompt_txt[80] -- the text going to be displayed on the labels fields.