gusucode.com > vision工具箱matlab源码程序 > vision/+vision/+internal/+ocr/+tool/ImageDisplay.m
classdef ImageDisplay < vision.internal.uitools.AppFigure
properties
KeyPressFcn
MouseButtonDownFcn
SelectionChangeFcn
OpenSelectionFcn
RemoveSelectionFcn
Tag = 'MainImageDisplay'
end
%----------------------------------------------------------------------
% UI components
%----------------------------------------------------------------------
properties
Panel
ImageBrowser
Axes
EditBox
EditBoxLabel
JEditBox
Text
end
%----------------------------------------------------------------------
% Edit box callbacks
%----------------------------------------------------------------------
properties
EditBoxCallbackFcn
EditBoxDeleteFcn
EditBoxKeyTypedFcn
EditBoxKeyPressedFcn
EditBoxFont
end
methods
% Construct main image display. Requires key press and button down
% callbacks to be provided.
function this = ImageDisplay()
this = this@vision.internal.uitools.AppFigure('Image');
% Use painters to avoid rendering issues
set(this.Fig, 'Renderer', 'painters');
end
%------------------------------------------------------------------
function set.KeyPressFcn(this, fcn)
this.KeyPressFcn = fcn;
this.Fig.KeyPressFcn = fcn;
end
%------------------------------------------------------------------
function drawCharacters(this, patches, whichChar, whichBox, label)
if isempty(patches)
return;
end
makeHandleVisible(this);
this.Panel = findobj(this.Fig, 'Type','uipanel');
if isempty(this.Panel) || ~ishandle(this.Panel) % make panel if needed.
this.Panel = uipanel('Parent', this.Fig, ...
'Units', 'Normalized',...
'Position', [0 0 1 0.88],...
'BackgroundColor', [1 1 1],...
'BorderType', 'none');
this.EditBoxLabel = uicontrol('Parent',this.Fig,'Style','text', ...
'Units','normalized','Position',[0 .92 .11 0.054],...
'String','Character Label:',...
'HorizontalAlignment','center','Visible','off',...
'BackgroundColor',[1 1 1], ...
'TooltipString', vision.getMessage('vision:ocrTrainer:CharLabelTooltip'));
this.JEditBox = javaObjectEDT('javax.swing.JTextField');
% Parent edit box to figure.
[~, this.EditBox] = javacomponent(this.JEditBox, [0 0 1 1], this.Fig);
% Set edit box tag for FINDOBJ use.
this.EditBox.Tag = 'JTextField';
% Center alignment of text.
% JTextField.CENTER is 0:
% http://developer.classpath.org/doc/javax/swing/SwingConstants.html#CENTER
javaMethodEDT('setHorizontalAlignment',this.JEditBox, 0)
javaMethodEDT('setToolTipText', this.JEditBox, ...
vision.getMessage('vision:ocrTrainer:CharLabelTooltip'));
this.EditBox.Units = 'Normalized';
this.positionLabelBox();
% attach callback to editbox
addlistener(this.JEditBox, 'ActionPerformedCallback',{this.EditBoxCallbackFcn, whichChar});
h = handle(this.JEditBox,'CallbackProperties');
% Action when user presses enter in text field.
set(h, 'ActionPerformedCallback', {this.EditBoxCallbackFcn,whichChar});
% Action when user presses printable character. Used
% primarily for ctrl-a.
set(h, 'KeyPressedCallback', {this.EditBoxKeyPressedFcn,this.JEditBox});
else
% clear panel contents. image browser will render into it.
% if this is not done, the image browser will add more axes
% to the panel.
if ishandle(this.Panel.Children)
delete(this.Panel.Children);
end
end
% add static text message for unknown chars
if strcmpi(label, char(0))
this.Text = uicontrol('Parent', this.Fig, 'Style','text',...
'String', vision.getMessage('vision:ocrTrainer:TrainingUnknownsMsg'),...
'HorizontalAlignment', 'right',...
'FontSize', 14, ...
'Units', 'normalized',...
'BackgroundColor','white');
positionLabelBoxAndText(this);
this.Fig.SizeChangedFcn = @(~,~)positionLabelBoxAndText(this);
else
this.Fig.SizeChangedFcn = @(~,~)positionLabelBox(this);
end
javaMethodEDT('setFont', this.JEditBox, java.awt.Font(...
this.EditBoxFont,java.awt.Font.PLAIN,24));
% enable context menu only if not the unknown char
enableContextMenu = ~strcmp(label,char(0));
this.ImageBrowser = ...
vision.internal.ocr.tool.ImageBrowser(...
this.Panel, patches, [100 100], enableContextMenu);
function scrollwheel(varargin)
this.ImageBrowser.mouseWheelFcn(varargin{:});
end
this.Fig.WindowScrollWheelFcn = @scrollwheel;
% set figure properties to enable smoother keyboard navigation.
this.Fig.Interruptible = 'off';
this.Fig.BusyAction = 'cancel';
addlistener(this.ImageBrowser,'SelectionChange',...
this.SelectionChangeFcn);
addlistener(this.ImageBrowser, 'OpenSelection', ...
this.OpenSelectionFcn);
addlistener(this.ImageBrowser, 'RemoveSelection', ...
this.RemoveSelectionFcn);
% set text first. calling selection callback next will trigger
% selection event which gets text label from edit box. If this
% is not done here, then labe will be empty.
this.JEditBox.setText(label);
% Select a box.
this.selectBox(whichBox);
% synchronise visibility so it appears as though all UI
% elements render at once.
this.EditBoxLabel.Visible = 'on';
this.EditBox.Visible = 'on';
updateEditBox(this, label);
javaMethodEDT('requestFocusInWindow',this.JEditBox);
lockFigure(this);
end
%------------------------------------------------------------------
% Update static text and edit box position on figure size change.
%------------------------------------------------------------------
function positionLabelBoxAndText(this)
positionLabelBox(this);
pos = hgconvertunits(this.Fig, [0 0 80 1.70], 'characters', 'normalized', this.Fig);
pos(1) = 1 - pos(3);
pos(2) = 1 - pos(4);
this.Text.Position = pos;
end
%------------------------------------------------------------------
% Update edit box position on figure size change.
%------------------------------------------------------------------
function positionLabelBox(this)
labelPos = hgconvertunits(this.Fig, [0 0 20 1], 'characters', 'normalized', this.Fig);
labelPos(1) = 0;
labelPos(2) = 1 - 2*labelPos(4);
this.EditBoxLabel.Position = labelPos;
editPos = hgconvertunits(this.Fig, [0 0 10 3], 'characters', 'normalized', this.Fig);
editPos(1) = labelPos(1) + labelPos(3) + 0.001;
editPos(2) = 1 - 1.1*editPos(4);
this.EditBox.Position = editPos;
end
%------------------------------------------------------------------
function doKeyPress(this, key, modifier)
% ImageBrowser takes MATLAB KeyData events. However, the app
% can produce java KeyEvents too. To handle both, call sites
% must pass the Key and Modifier to this function, which will
% then package the data for the ImageBrowser key press
% function.
src.Key = key;
if nargin == 3
src.Modifier = modifier;
else
src.Modifier = '';
end
this.ImageBrowser.keyPressFcn(this.Fig,src);
end
%------------------------------------------------------------------
function updateFont(this, font)
this.EditBoxFont = font;
javaMethodEDT('setFont', this.JEditBox, java.awt.Font(...
font,java.awt.Font.PLAIN,24));
end
%------------------------------------------------------------------
function wipeFigure(this)
% Take care of deleting java edit box. This does not get
% cleared by calling CLF(this.Fig).
eb = findobj(this.Fig,'Tag','JTextField');
if ishandle(eb)
delete(eb);
end
% wipe remaining UI elements
wipeFigure@vision.internal.uitools.AppFigure(this);
end
%------------------------------------------------------------------
function selectBox(this, whichBox)
this.ImageBrowser.setSelection(whichBox);
end
%------------------------------------------------------------------
function unselectBox(this, ~)
this.ImageBrowser.setSelection([]);
end
%------------------------------------------------------------------
function p = getPatch(this, which)
tag = sprintf('montage_bboxPatch%d',which);
p = findobj(this.Fig, 'Type','patch','Tag', tag);
end
%------------------------------------------------------------------
function updateEditBox(this, label)
if strcmpi(label,'unknown')
label = char(0);
else
label = this.parseUserLabel(label);
end
if ishandle(this.EditBox)
javaMethodEDT('setText',this.JEditBox,label);
javaMethodEDT('selectAll',this.JEditBox);
javaMethodEDT('requestFocusInWindow',this.JEditBox);
end
end
%------------------------------------------------------------------
% Return single character label for ASCII labels. For non-ascii
% return the entire label as it could be a multi-character unicode
% symbol.
%------------------------------------------------------------------
function label = parseUserLabel(~, label)
if numel(label) > 1
if char(label(1)) <= char(127)
label = label(1);
end
end
end
%------------------------------------------------------------------
function setFocusOnEditBox(this)
figure(this.Fig); % give focus to display first
javaMethodEDT('requestFocusInWindow',this.JEditBox);
end
%------------------------------------------------------------------
function str = getEditBoxString(this)
str = javaMethodEDT('getText',this.JEditBox);
str = char(str);
str = this.parseUserLabel(str);
end
end
end