www.gusucode.com > GUI的布局工具箱 > GUI的布局工具箱/GUI的布局工具箱/GUILayout-v1p10/+uiextras/HBoxFlex.m
classdef HBoxFlex < uiextras.HBox
%HBoxFlex A dynamically resizable horizontal layout
%
% obj = uiextras.HBoxFlex() creates a new dynamically resizable
% horizontal box layout with all parameters set to defaults. The
% output is a new layout object that can be used as the parent for
% other user-interface components.
%
% obj = uiextras.HBoxFlex(param,value,...) also sets one or more
% parameter values.
%
% See the <a href="matlab:doc uiextras.HBoxFlex">documentation</a> for more detail and the list of properties.
%
% Examples:
% >> f = figure( 'Name', 'uiextras.HBoxFlex example' );
% >> b = uiextras.HBoxFlex( 'Parent', f );
% >> uicontrol( 'Parent', b, 'Background', 'r' )
% >> uicontrol( 'Parent', b, 'Background', 'b' )
% >> uicontrol( 'Parent', b, 'Background', 'g' )
% >> uicontrol( 'Parent', b, 'Background', 'y' )
% >> set( b, 'Sizes', [-1 100 -2 -1], 'Spacing', 5 );
%
% See also: uiextras.VBoxFlex
% uiextras.HBox
% uiextras.Grid
% Copyright 2009-2010 The MathWorks, Inc.
% $Revision: 366 $
% $Date: 2011-02-10 15:48:11 +0000 (Thu, 10 Feb 2011) $
properties
ShowMarkings = 'on' % Show markings on the draggable dividers [ on | off ]
end % public methods
properties (Access=private)
Dividers = []
SelectedDivider = -1
end % private properties
methods
function obj = HBoxFlex( varargin )
% First step is to create the parent class. We pass the
% arguments (if any) just incase the parent needs setting
obj@uiextras.HBox( varargin{:} );
% Set some defaults
obj.setPropertyFromDefault( 'ShowMarkings' );
% Set user-supplied property values
if nargin > 0
set( obj, varargin{:} );
end
end % constructor
end % public methods
methods
function set.ShowMarkings( obj, value )
% Check
if ~ischar( value ) || ~ismember( lower( value ), {'on','off'} )
error( 'GUILayout:HBoxFlex:InvalidPropertyValue', ...
'Property ''ShowMarkings'' may only be set to ''on'' or ''off''.' )
end
% Apply
obj.ShowMarkings = lower( value );
obj.redraw();
end % set.ShowMarkings
end % accessor methods
methods( Access = protected )
function redraw( obj )
%REDRAW Redraw container contents.
% First call the grid redraw
[widths,heights] = redraw@uiextras.HBox(obj);
sizes = obj.Sizes;
children = obj.getValidChildren();
nChildren = numel( children );
padding = obj.Padding;
spacing = obj.Spacing;
% Now also add/update some dividers
mph = uiextras.MousePointerHandler( obj.Parent );
numDynamic = 0;
for ii = 1:nChildren-1
if any(sizes(1:ii)<0) && any(sizes(ii+1:end)<0)
numDynamic = numDynamic + 1;
% Both dynamic, so add a divider
position = [sum( widths(1:ii) ) + padding + spacing * (ii-1) + 1, ...
padding + 1, ...
max(1,spacing), ...
heights(ii)];
% Create the divider widget
if numDynamic > numel( obj.Dividers )
obj.Dividers(numDynamic) = uiextras.makeFlexDivider( ...
obj.UIContainer, ...
position, ...
get( obj.UIContainer, 'BackgroundColor' ), ...
'Vertical', ...
obj.ShowMarkings );
set( obj.Dividers(numDynamic), 'ButtonDownFcn', @obj.onButtonDown, ...
'Tag', 'UIExtras:HBoxFlex:Divider' );
% Add it to the mouse-over handler
mph.register( obj.Dividers(numDynamic), 'left' );
else
% Just update an existing divider
uiextras.makeFlexDivider( ...
obj.Dividers(numDynamic), ...
position, ...
get( obj.UIContainer, 'BackgroundColor' ), ...
'Vertical', ...
obj.ShowMarkings );
end
setappdata( obj.Dividers(numDynamic), 'WhichDivider', ii );
end
end
% Remove any excess dividers
if numel( obj.Dividers ) > numDynamic
delete( obj.Dividers(numDynamic+1:end) );
obj.Dividers(numDynamic+1:end) = [];
end
end % redraw
function onButtonDown( obj, source, eventData ) %#ok<INUSD>
figh = ancestor( source, 'figure' );
% We need to store any existing motion callbacks so that we can
% restore them later.
oldProps = struct();
oldProps.WindowButtonMotionFcn = get( figh, 'WindowButtonMotionFcn' );
oldProps.WindowButtonUpFcn = get( figh, 'WindowButtonUpFcn' );
oldProps.Pointer = get( figh, 'Pointer' );
oldProps.Units = get( figh, 'Units' );
% Make sure all interaction modes are off to prevent our
% callbacks being clobbered
zoomh = zoom( figh );
r3dh = rotate3d( figh );
panh = pan( figh );
oldState = '';
if isequal( zoomh.Enable, 'on' )
zoomh.Enable = 'off';
oldState = 'zoom';
end
if isequal( r3dh.Enable, 'on' )
r3dh.Enable = 'off';
oldState = 'rotate3d';
end
if isequal( panh.Enable, 'on' )
panh.Enable = 'off';
oldState = 'pan';
end
% Now set the new callbacks
set( figh, ...
'WindowButtonMotionFcn', @obj.onButtonMotion, ...
'WindowButtonUpFcn', {@obj.onButtonUp, oldProps, oldState}, ...
'Pointer', 'left', ...
'Units', 'Pixels' );
% Make the divider visible
cdata = get( source, 'CData' );
if mean( cdata(:) ) < 0.5
% Make it brighter
cdata = 1-0.5*(1-cdata);
newCol = 1-0.5*(1-get( obj.UIContainer, 'BackgroundColor' ));
else
% Make it darker
cdata = 0.5*cdata;
newCol = 0.5*get( obj.UIContainer, 'BackgroundColor' );
end
set( source, ...
'BackgroundColor', newCol, ...
'ForegroundColor', newCol, ...
'CData', cdata );
obj.SelectedDivider = source;
end % onButtonDown
function onButtonMotion( obj, source, eventData ) %#ok<INUSD>
% First capture the current cursor position
figh = ancestor( source, 'figure' );
cursorpos = get( figh, 'CurrentPoint' );
pos0 = getpixelposition( obj.UIContainer, true );
% We need to gaurd against the focus having been lost. In this
% case we should have received a button-up event, but sometimes
% don't (at least on Windows).
if ishandle( obj.SelectedDivider )
% All OK, so move it
dividerpos = get( obj.SelectedDivider, 'Position' );
dividerpos(1) = cursorpos(1) - pos0(1) - round(obj.Spacing/2) + 1;
% Make sure that the position doesn't cause an element to
% shrink too much
minSizes = obj.MinimumSizes(:);
pixSizes = uiextras.calculatePixelSizes( pos0(3), ...
obj.Sizes, minSizes, obj.Padding, obj.Spacing );
N = numel( minSizes );
% Sometimes the actual width is smaller than the minimum!
minSizes = min( minSizes, pixSizes );
whichDivider = getappdata( obj.SelectedDivider, 'WhichDivider' );
minPos = ceil( obj.Padding ...
+ sum( pixSizes(1:whichDivider-1) ) ...
+ minSizes(whichDivider) ...
+ obj.Spacing*(whichDivider-0.5) );
dividerpos(1) = max( dividerpos(1), minPos );
if whichDivider<(N-1)
maxPos = pos0(3) - floor( obj.Padding ...
+ sum( pixSizes(whichDivider+2:end) ) ...
+ minSizes(whichDivider+1) ...
+ obj.Spacing*(N-whichDivider-0.5) );
else
% Final divider
maxPos = pos0(3) - floor( obj.Padding ...
+ minSizes(whichDivider+1) ...
+ obj.Spacing*0.5 );
end
dividerpos(1) = min( dividerpos(1), maxPos );
set( obj.SelectedDivider, 'Position', dividerpos );
else
% Divider has been lost, so we are in a bad state. The
% best we can do is kill the callbacks and attempt to put
% the figure back in a decent state.
set( figh, 'Pointer', 'arrow', ...
'WindowButtonMotionFcn', [], ...
'WindowButtonUpFcn', [] );
end
end % onButtonMotion
function onButtonUp( obj, source, eventData, oldFigProps, oldState )
% Deliberately call the motion function to ensure any last
% movement is captured
obj.onButtonMotion( source, eventData );
% Restore figure properties
figh = ancestor( source, 'figure' );
flds = fieldnames( oldFigProps );
for ii=1:numel(flds)
set( figh, flds{ii}, oldFigProps.(flds{ii}) );
end
% If the figure has an interaction mode set, re-set it now
if ~isempty( oldState )
switch upper( oldState )
case 'ZOOM'
zoom( figh, 'on' );
case 'PAN'
pan( figh, 'on' );
case 'ROTATE3D'
rotate3d( figh, 'on' );
otherwise
error( 'GUILayout:InvalidState', 'Invalid interaction mode ''%s''.', oldState );
end
end
% Work out which divider was moved and which are the resizable
% elements either side of it
newPos = get( obj.SelectedDivider, 'Position' );
origPos = getappdata( obj.SelectedDivider, 'OriginalPosition' );
whichDivider = getappdata( obj.SelectedDivider, 'WhichDivider' );
obj.SelectedDivider = -1;
delta = newPos(1) - origPos(1) - round(obj.Spacing/2) + 1;
sizes = obj.Sizes;
% Convert all flexible sizes into pixel units
totalPosition = ceil( getpixelposition( obj.UIContainer ) );
totalWidth = totalPosition(3);
pixSizes = uiextras.calculatePixelSizes( totalWidth, ...
obj.Sizes, obj.MinimumSizes, obj.Padding, obj.Spacing );
leftelement = find( sizes(1:whichDivider)<0, 1, 'last' );
rightelement = find( sizes(whichDivider+1:end)<0, 1, 'first' )+whichDivider;
% Now work out the new sizes. Note that we must ensure the size
% stays negative otherwise it'll stop being resizable
change = sum(sizes(sizes<0)) * delta / sum( pixSizes(sizes<0) );
sizes(leftelement) = min( -0.000001, sizes(leftelement) + change );
sizes(rightelement) = min( -0.000001, sizes(rightelement) - change );
% Setting the sizes will cause a redraw
obj.Sizes = sizes;
end % onButtonUp
function onBackgroundColorChanged( obj, source, eventData ) %#ok<INUSD>
%onBackgroundColorChanged Callback that fires when the container background color is changed
%
% We need to make the dividers match the background, so redarw
% them
obj.redraw();
end % onChildRemoved
end % protected methods
end % classdef