[2] | 1 | ;------------------------------------------------------------ |
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| 2 | ;------------------------------------------------------------ |
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| 3 | ;------------------------------------------------------------ |
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| 4 | ;+ |
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| 5 | ; NAME:xquestion |
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| 6 | ; |
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| 7 | ; PURPOSE: a small widget who ask a question and give an answer. |
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| 8 | ; WARNING: For a binary question with yes/no answer use |
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| 9 | ; DIALOG_MESSAGE. |
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| 10 | ; |
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| 11 | ; CATEGORY: widget |
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| 12 | ; |
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| 13 | ; CALLING SEQUENCE: answer = xquestion(question[,proposedanswer]) |
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| 14 | ; |
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| 15 | ; INPUTS: |
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| 16 | ; question: a scalar string or a array of string. If this |
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| 17 | ; argument is set to : |
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| 18 | ; + an array of strings: each array element is |
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| 19 | ; displayed as a separate line of text. |
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| 20 | ; + a scalar string: we are looking for the "separate line |
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| 21 | ; character" '!C' |
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| 22 | ; |
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| 23 | ; proposedanswer: a string proposing a answer |
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| 24 | ; |
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| 25 | ; KEYWORD PARAMETERS: those from WIDGET_BASE and WIDGET_TEXT |
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| 26 | ; |
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| 27 | ; /CHKWIDGET: active this keyword if you whant that xquestion |
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| 28 | ; check if managed widget are present. If not, xquestion do not |
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| 29 | ; open a widget but print the question in the IDL window. |
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| 30 | ; |
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| 31 | ; OUTPUTS: |
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| 32 | ; answer: a string |
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| 33 | ; |
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| 34 | ; COMMON BLOCKS: |
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| 35 | ; none (we use a "false widget") |
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| 36 | ; |
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| 37 | ; SIDE EFFECTS: |
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| 38 | ; The function does not return to its caller until the user |
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| 39 | ; press "Enter" key in the widget. |
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| 40 | ; |
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| 41 | ; RESTRICTIONS: |
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| 42 | ; |
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| 43 | ; EXAMPLE: |
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| 44 | ; |
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| 45 | ; IDL> help, xquestion('Postscript name') |
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| 46 | ; <Expression> STRING = 'toto.ps' |
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| 47 | ; |
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| 48 | ; MODIFICATION HISTORY:Sebastien Masson (smasson@lodyc.jussieu.fr) |
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| 49 | ; 13/10/1999 |
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| 50 | ;- |
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| 51 | ;------------------------------------------------------------ |
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| 52 | ;------------------------------------------------------------ |
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| 53 | ;------------------------------------------------------------ |
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| 54 | ;------------------------------------------------------------------------- |
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| 55 | pro xquestion_event, event |
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| 56 | ; we get the answer |
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| 57 | widget_control, widget_info(event.top, find_by_uname = 'text') $ |
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| 58 | , get_value = answer & answer = answer[0] |
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| 59 | ; now we give the answer to xquestion.pro by using the pointer uvalue |
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| 60 | widget_control, event.top, get_uvalue = ptranswer |
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| 61 | *ptranswer = answer |
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| 62 | ; we destroy the widget |
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| 63 | widget_control, event.top, /destroy |
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| 64 | return |
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| 65 | end |
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| 66 | ;------------------------------------------------------------------------- |
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| 67 | FUNCTION xquestion, question, proposedanswer, CHKWIDGET = chkwidget, _extra = ex ; |
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| 68 | ; is separate line a scalar? we must cut it into pieces? |
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| 69 | if n_elements(question) EQ 1 then question = str_sep(question, '!C', /trim) |
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| 70 | ; is a widget necessary? |
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| 71 | if keyword_set(chkwidget) then BEGIN |
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| 72 | if (widget_info(/managed))[0] EQ 0 then BEGIN |
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| 73 | if n_elements(proposedanswer) EQ 0 then BEGIN |
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| 74 | proposedanswer = '' |
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| 75 | answer = '' |
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| 76 | complete = '' |
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| 77 | ENDIF ELSE BEGIN |
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| 78 | answer = proposedanswer |
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| 79 | complete = '(default answer is '+proposedanswer+') ' |
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| 80 | ENDELSE |
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| 81 | if n_elements(question) GT 1 THEN $ |
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| 82 | for i = 0, n_elements(question)-2 do print,question[i] |
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| 83 | read, question[n_elements(question)-1]+' '+complete , answer |
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| 84 | if keyword_set(answer) EQ 0 then answer = proposedanswer |
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| 85 | return, answer |
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| 86 | endif |
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| 87 | endif |
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| 88 | ; definition of the widget |
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| 89 | BaseId = widget_base(/column, title = 'Question', _extra = ex) |
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| 90 | screensize = get_screen_size() |
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| 91 | widget_control, BaseId, tlb_set_xoffset = screensize[0]/2.2, tlb_set_yoffset = screensize[1]/2.2 |
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| 92 | for i = 0, n_elements(question)-1 DO trash = widget_label(BaseId, value = question[i], /align_left) |
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| 93 | if n_elements(proposedanswer) EQ 0 then answer = '' ELSE answer = proposedanswer |
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| 94 | trash = widget_text(BaseId, value = answer, /editable, _extra = ex, uname = 'text') |
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| 95 | trash = widget_button(BaseId, value = 'ok') |
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| 96 | ptranswer = ptr_new(/allocate_heap) |
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| 97 | widget_control, BaseId, set_uvalue = ptranswer |
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| 98 | ; we realize the widget and wait for an answer |
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| 99 | widget_control,BaseId,/realize |
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| 100 | xmanager,'xquestion',BaseId |
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| 101 | ; we get the answer |
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| 102 | answer = *ptranswer |
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| 103 | ; we freeing the pointer |
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| 104 | ptr_free, ptranswer |
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| 105 | ; |
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| 106 | return, answer |
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| 107 | end |
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