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| | * A notification triggering attribute value may be passed directly to method, as its parameter. | | * A notification triggering attribute value may be passed directly to method, as its parameter. |
| | * Using methods improves code modularity. | | * Using methods improves code modularity. |
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| − | <!--
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| − | ====Creating Textfields====
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| − | The ''Text'' MUI class is used not only for creating static texts or labels (like in the [["Hello world!" in MUI|"Hello World!" example]]), but also framed readonly text gadgets and textual buttons. All these object differ only in attributes. A read-only framed text field has a specific background and frame:
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| − | Object* create_resdisplay(void)
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| − | {
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| − | Object *obj;
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| − |
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| − | obj = MUI_NewObject(MUIC_Text,
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| − | MUIA_Frame, MUIV_Frame_Text,
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| − | MUIA_Background, MUII_TextBack,
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| − | TAG_END);
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| − |
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| − | return obj;
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| − | }
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| − |
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| − | ====Creating Buttons====
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| − | As said above, a text button is an instance of the ''Text'' class too. It has more attributes than a plain label however. ''MUIA_Text_PreParse'' attribute centers the text in the object using a control code of the [[MUI text engine]]. After setting a frame and a background, a proper font is also specified with ''MUIA_Font''. Forgetting this attribute is one of common interface design errors. Next four attributes are related to user input. ''MUIA_InputMode'' attribute defines type of button (push or toggle one). ''MUIA_CycleChain'' makes the button reachable with keyboard. Incomplete keyboard support for GUI is another common error and should be avoided. All gadgets receiving user input should have ''MUIA_CycleChain'' set. Most important gadgets should be also reachable with single keys. ''MUIA_ControlChar'' sets a key, which activates the gadget. For textual gadgets a letter of this key should be also underlined with ''MUIA_Text_HiChar''. It implies that the character used should be present in the gadget label. Both these attributes should be set to small letters. ''MUIA_ControlChar'' set to a capital letter will force user to press ''SHIFT''. ''MUIA_Text_HiChar'' is case insensitive. Digits can be also used for control characters, if button labels contain them. Using other characters is strongly discouraged.
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| − | The function is called six times in the code, and creates six pushbuttons. The toggle button "Large Data" is created by very similar ''create_datasize_button()'' function, which differs in ''MUIA_InputMode'' value. As it is used once only, the button label and control character are hardcoded inside the function and not passed as arguments.
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| − | ''MUIA_HorizWeight'' and ''MUIA_Text_SetMax'' attributes are used for [[layout control]]. They are described in the autodoc of ''Area'' and ''Text'' class respectively.
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| − | Object* create_button(char *label, char control)
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| − | {
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| − | Object *obj;
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| − |
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| − | obj = MUI_NewObject(MUIC_Text,
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| − | MUIA_Text_Contents, (ULONG)label,
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| − | MUIA_Text_PreParse, "\33c",
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| − | MUIA_Frame, MUIV_Frame_Button,
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| − | MUIA_Background, MUII_ButtonBack,
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| − | MUIA_Font, MUIV_Font_Button,
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| − | MUIA_InputMode, MUIV_InputMode_RelVerify,
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| − | MUIA_Text_HiChar, control,
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| − | MUIA_ControlChar, control,
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| − | MUIA_CycleChain, TRUE,
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| − | MUIA_HorizWeight, 1,
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| − | TAG_END);
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| − |
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| − | return obj;
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| − | }
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| − |
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| − | ====Creating Spacing Bars====
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| − | Horizontal and vertical bars may be used for visual separation of gadgets. They are created using ''Rectangle'' class. In a basic case the class creates just empty rectangles and is used for [[layout control]]. ''MUIA_Rectangle_HBar'' attribute adds a horizontal bar. The object has also height fixed, to avoid its vertical scaling. Bars and grouping frames should be used sparingly.
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| − | Object* create_hbar(void)
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| − | {
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| − | Object *obj;
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| − |
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| − | obj = MUI_NewObject(MUIC_Rectangle,
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| − | MUIA_Rectangle_HBar, TRUE,
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| − | MUIA_FixHeight, 2,
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| − | TAG_END);
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| − |
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| − | return obj;
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| − | }
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| − |
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| − | ====Creating Gauge====
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| − | A ''Gauge'' object creates a progress bar and an optional text on it. Gauges may be vertical or horizontal, but only horizontal ones can display text. Frame, background and font are specified as usual. An initial text causes the gauge object to have fixed height.
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| − |
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| − | Object* create_statusbar(void)
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| − | {
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| − | Object *obj;
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| − |
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| − | obj = MUI_NewObject(MUIC_Gauge,
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| − | MUIA_Frame, MUIV_Frame_Gauge,
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| − | MUIA_Font, MUIV_Font_Gauge,
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| − | MUIA_Background, MUII_GaugeEmpty,
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| − | MUIA_Gauge_Horiz, TRUE,
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| − | MUIA_Gauge_InfoText, (ULONG)"Ready.",
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| − | TAG_END);
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| − |
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| − | return obj;
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| − | }
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| − |
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| − | -->
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