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"
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COPYRIGHT (c) 1990 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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StandardSystemView subclass:#ModalBox
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instanceVariableNames:'haveControl shadowView exclusiveKeyboard '
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classVariableNames:'PopShadow'
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poolDictionaries:''
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category:'Views-Basic'
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!
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ModalBox comment:'
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COPYRIGHT (c) 1990 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libview/ModalBox.st,v 1.9 1994-08-05 01:14:33 claus Exp $
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'!
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!ModalBox class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1990 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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version
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"
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$Header: /cvs/stx/stx/libview/ModalBox.st,v 1.9 1994-08-05 01:14:33 claus Exp $
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"
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!
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2
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documentation
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"
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this class implements modal boxes; ModalBoxes are different from
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others, in that they take complete control over the display, until
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all processing is done (i.e. other views will not get any events
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while the box is active).
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class variables:
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PopShadow <Boolean> if true, modalBoxes will show a shadow
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"
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! !
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!ModalBox class methodsFor:'initialization'!
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initialize
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super initialize.
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Display notNil ifTrue:[
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PopShadow := self classResources name:'POPUP_SHADOW' default:false
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]
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! !
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!ModalBox methodsFor:'initialize / release'!
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initialize
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super initialize.
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haveControl := false.
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exclusiveKeyboard := false.
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PopShadow ifTrue:[
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shadowView := (ShadowView on:device) for:self
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]
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!
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initStyle
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super initStyle.
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((style ~~ #normal) and:[style ~~ #mswindows]) ifTrue:[
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borderWidth := 0.
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self level:2
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]
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!
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addToCurrentProject
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"ignored here"
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^ self
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!
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destroy
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shadowView notNil ifTrue:[
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shadowView destroy.
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shadowView := nil
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].
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self leaveControl. "just to make sure"
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super destroy.
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!
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create
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super create.
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2
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PopShadow ifFalse:[
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self saveUnder:true
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]
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!
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createOnTop
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^ true
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! !
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!ModalBox methodsFor:'accessing'!
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exclusiveKeyboard:aBoolean
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"set/clear exclusive locking of the keyboard;
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If set, the box will take total control over the
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keyboard, not allowing input to other views/boxes
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while active.
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Danger: only use this for very very urgent boxes, since
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no interaction with any view on the screen is possible then."
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exclusiveKeyboard := aBoolean
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! !
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!ModalBox methodsFor:'show / hide'!
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mapped
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"wait till visible for grabbing"
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super mapped.
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"take it away from any popup menu possibly still active"
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ActiveGrab notNil ifTrue:[
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device ungrabKeyboard.
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ActiveGrab := nil.
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].
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"
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if I am a super-modal box, take the keyboard
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"
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exclusiveKeyboard ifTrue:[
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device grabKeyboardIn:drawableId.
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].
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"
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get the focus
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"
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device setInputFocusTo:drawableId.
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self enableEnterLeaveEvents
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!
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fixPosition:aPoint
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"make sure, that the box is visible by shifting it
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into the visible screen area if nescessary"
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self origin:aPoint.
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self makeFullyVisible
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!
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positionOffset
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"return the delta, by which the box should be
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displaced from the mouse pointer. Usually redefined in
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subclasses to have some ok-button appear under
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the pointer."
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^ (width // 2) @ (height // 2)
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!
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open
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"default for modalboxes is to come up modal"
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^ self openModal
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!
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openModal
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"open the box modal;
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In addition to the basic (inherited) modalloop, change
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the current maingroups cursors to the busy-stop cursor, show
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a shadow, and raise the box."
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|g|
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g := WindowGroup activeGroup.
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g notNil ifTrue:[
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g := g mainGroup.
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g notNil ifTrue:[
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g showCursor:(Cursor stop)
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]
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].
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shadowView notNil ifTrue:[shadowView realize].
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self raise.
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haveControl := true.
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super openModal.
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!
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show
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"make myself visible (at the last position) and take control"
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self fixSize.
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self openModal
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!
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showAt:aPoint
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"make myself visible at aPoint.
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Fix position to make box fully visible"
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self fixSize.
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self fixPosition:aPoint.
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self openModal
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!
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showAtCenter
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"make myself visible at the screen center."
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self fixSize.
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self showAt:(device center - (self extent / 2))
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!
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showAtPointer
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"make myself visible at mouse pointer shifted to have
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convenient button under cursor.
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Fix position to make box fully visible"
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self fixSize.
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self showAt:(device pointerPosition - self positionOffset).
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!
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showAtPointerNotCovering:aView
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"make myself visible at mouse pointer shifted to have
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convenient button under cursor.
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Fix position to make box fully visible and to make sure that
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aView is not covered."
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|pos newX|
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0
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pos := device pointerPosition - self positionOffset.
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((Rectangle origin:pos extent:self extent)
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intersects: (aView origin corner: aView corner))
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ifTrue:[
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"
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try to the right of the untouchable view
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"
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newX := (aView origin x + aView width).
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newX + width > device width ifTrue:[
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newX := device width - width
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].
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pos x:newX.
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((Rectangle origin:pos extent:self extent)
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intersects: (aView origin corner: aView corner))
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ifTrue:[
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"
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try to the left of the untouchable view
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"
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newX := aView origin x - width.
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"
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should look for vertical possibilities too ...
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"
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pos x:newX.
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]
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].
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self showAt:pos
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!
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hide
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"make the receiver invisible and leave control"
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shadowView notNil ifTrue:[shadowView unrealize].
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self unrealize.
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device synchronizeOutput.
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self leaveControl.
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!
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autoHideAfter:seconds with:anAction
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"install a background process, which hides the box
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after some time. Also, if non-nil, anAction will be
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evaluated then."
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[
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(Delay forSeconds:seconds) wait.
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self shown ifTrue:[
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self hide.
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anAction notNil ifTrue:[anAction value]
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]
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] forkAt:4.
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"
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|b|
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b := InfoBox title:'hello there'.
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b autoHideAfter:5 with:[].
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b showAtCenter.
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"
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! !
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!ModalBox methodsFor:'events'!
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pointerEnter:state x:x y:y
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"
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mhmh: this seems to be a special X kludge;
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without the following, we will not regain input focus after
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pointer is reentered"
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device setInputFocusTo:drawableId.
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super pointerEnter:state x:x y:y
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! !
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317 |
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!ModalBox methodsFor:'private'!
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54
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leaveControl
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|g|
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windowGroup notNil ifTrue:[
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g := windowGroup mainGroup.
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g notNil ifTrue:[
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g restoreCursors
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]
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].
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haveControl := false.
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exclusiveKeyboard ifTrue:[
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331 |
device ungrabKeyboard
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332 |
]
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0
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333 |
! !
|