Class: VariablePanelController

• Inheritance
• Description
• Instance protocol
  • event handling
  • private
  • queries
  • user operations

Inheritance:

   Object
   |
   +--Controller
      |
      +--VariablePanelController
         |
         +--VariableHorizontalPanelController
         |
         +--VariableVerticalPanelController

Package:

stx:libwidg

Category:

Interface-Support-Controllers

Version:

rev: 1.46 date: 2019/04/04 12:15:17

user: stefan

file: VariablePanelController.st directory: libwidg

module: stx stc-classLibrary: libwidg

Author:

Claus Gittinger

Description:

An abstract class for variablePanel controllers;
normally, not used directly by applications, these are created automatically
whenever a variablePanel is created.
Instances are responsible for tracking the mouse pointer and resize the
views (a panel) subviews as appropriate.

Instance protocol:

 buttonMotion: state x: bx y: by

mouse-button was moved while pressed;
clear prev handleBar and draw handle bar at new position

 buttonPress: button x: bx y: by

button was pressed - setup resizing if a handle is hit

 buttonRelease: button x: bx y: by

end bar-move

 pointerEnter: state x: bx y: by

this could be send by the KDE before a button press event;
test whether the state == 0

 pointerLeave: state

this could be send by KDE before a button press event;
test whether the state == 0

 checkedHandleMovementX: bx y: by

check and return valid position a handle can be placed

 detectHandleIndexAt: x y: y

returns the handle index at position x@y or nil if none detected

 isSnapEntered

 isSnapEntered: anIndex

 isSnapPressed

 doInvertHandle

invert a handle

 doResize

perform the resize

 doSnapPressedX: x y: y

perform the snap press