DI_RADIOBUTTON

Far Manager

DI_RADIOBUTTON

The DI_RADIOBUTTON dialog item describes a Radio Button control. It is also known as the "button with dependent fixation". It acts like a Check Box, except that if the first radio button item in a group of several consequent radio button items have the DIF_GROUP flag set, they become mutually exclusive — if one of them has been switched on all others will be switched off.

struct FarDialogItem
{
  int Type          = DI_RADIOBUTTON
  int X1            = X
  int Y1            = Y
  int X2            = 0 (not used in Dialog API 1.0)
  int Y2            = Y (equals to Y1)
  int Focus         = Focus
  int Selected      = Selected
  DWORD Flags       = Flags
  int DefaultButton = DefaultButton
  char Data[512]    = Radio button caption
};

Attention!

This is an exemplary structure; read full description here.

Focus

Keyboard focus flag.

Selected

The field reflects current state of the radio button control: is it switched on or off.

Flags

There are several flags applicable to the DI_RADIOBUTTON control:

Flag	Description
DIF_SETCOLOR	The low byte of Flags will be used as the item's color.
DIF_GROUP	This flag should be set for the first radio button item in a group.
DIF_MOVESELECT	Change selection in a radio button group when focus is moved. Radio buttons with this flag set are also drawn without parentheses around the selection mark (example: FAR color selection dialog).
DIF_CENTERGROUP	Sequential items with this flag set and equal vertical coordinates will be horizontally centered in the dialog. Their X1 and X2 coordinates are ignored.
DIF_DISABLE	Disables user access to the control.
DIF_NOFOCUS	The dialog item cannot receive keyboard focus, but can handle other user events.
DIF_SHOWAMPERSAND	Show ampersand symbol in caption instead of using it for defining hotkeys.

Events

Event	Description
DN_DRAWDLGITEM	This event is sent to the dialog callback function before the control is drawn.
DN_CTLCOLORDLGITEM	Plugin should pass the color attributes of the control when this event comes. Param2 parameter (foreground+background): LoWord LoByte - color of the caption (COL_WARNDIALOGBUTTON or COL_DIALOGTEXT) LoWord HiByte - color of highlighted text (COL_WARNDIALOGHIGHLIGHTTEXT or COL_DIALOGHIGHLIGHTTEXT) HiWord LoByte - 0 HiWord HiByte - 0 If a special attribute is used (DIF_SETCOLOR flag), the caption (LoWord LoByte) will be drawn according to the parameters.
DN_HOTKEY	Hotkey was pressed (Alt-<letter>).
DN_BTNCLICK	State of the radiobutton was changed.
DN_KEY	This event comes after the user has pressed a key in the dialog.
DN_MOUSECLICK	This event comes after the user has clicked one of the dialog items or outside the dialog with the mouse button.
DN_KILLFOCUS	This event is sent just before the button loses focus, if the flag DIF_NOFOCUS was not used.
DN_GOTFOCUS	This event is sent after the button has received keyboard focus, if the flag DIF_NOFOCUS was not used.

Remarks

It is strongly recommended to set correct values for X2 and Y2 fields, although they aren't used in Dialog API 1.0.