Futurebasic/Language/Reference/def embedbutton

DEF EMBEDBUTTON Statement

DEF EMBEDBUTTON

Statement

✔ Appearance ✔ Standard ✔ Console

Syntax

DEF EMBEDBUTTON(childButtonID&, parentButtonID&)

Revised

February 2002 (Release 6)

Description

The appearance manager can embed several buttons (sub controls) within a single parent button (or super control). In fact, buttons may be embedded in buttons which are in turn embedded in other buttons. The advantages are enormous. Take this example: each window has a single root control. All buttons within the window are embedded into this root control or into one of its children. When the window becomes inactive, the root control is disabled. With that single command (implemented by the FB runtime) all other controls in the window are automatically disabled.

The versatility extends to things like showing or hiding a pane in a tab control or buttons within a group.

Example

The following example creates a radio button group and embeds individual buttons into the super control. As a result, you can poll the group button to find out which of the radio sub controls is currently selected.

image d/DEF%20EMBEDBUTTON02.gif

DIM r as rect
DIM pR as rect
DIM h as handle
DIM bRef as long
DIM err as OSErr

// create a window
SETRECT(r,0,0,_btnWd_btnMargin_btnMargin,120)

APPEARANCE WINDOW 1,,@r

err = FN SETTHEMEWINDOWBACKGROUND( window( _wndPointer ),¬
  _kThemeActiveDialogBackgroundBrush, _zTrue )

// button #1 is the papa button
// note that the parent button has sufficient space so that // it holds all embedded buttons within its own rectangle

SETRECT(r,_btnMargin,_btnMargin,¬
  _btnMargin_btnWd,(_btnMargin_btnHt)*3)
APPEARANCE BUTTON bRef,_activeBtn,0,0,1,¬
  "",@r,_kControlRadioGroupProc

bRef ++
SETRECT(r,_btnMargin,_btnMargin,_btnMargin_btnWd,¬
  _btnMargin_btnHt)
APPEARANCE BUTTON bRef,_activeBtn,0,0,1,¬
  "Radio 1",@r,_kControlRadioButtonProc
DEF EMBEDBUTTON(bRef,1)

bRef ++ : offsetrect(r,0,_btnHt_btnMargin)
APPEARANCE BUTTON bRef,_activeBtn,0,0,1,¬
  "Radio 2",@r,_kControlRadioButtonProc
DEF EMBEDBUTTON(bRef,1)

bRef ++ : offsetrect(r,0,_btnHt_btnMargin)
APPEARANCE BUTTON bRef,_activeBtn,0,0,1,¬
  "Radio 3",@r,_kControlRadioButtonProc
DEF EMBEDBUTTON(bRef,1)

LOCAL FN handleDialog
  DIM AS LONG action,reference
  action = DIALOG(0)
  reference = DIALOG(action)
  LONG IF action = _btnclick
    MOVETO(8,100)
    PRINT "Current Button ";button(1);
  END IF
END FN

ON DIALOG FN handleDialog

DO
  HANDLEEVENTS
UNTIL 0