litesoft
@ 948
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package org.litesoft.sandbox.csapp.client.widgets; import com.google.gwt.dom.client.*; import com.google.gwt.user.client.Element; import com.google.gwt.user.client.*; import com.google.gwt.user.client.ui.*; public class UploadWidget extends Composite implements IsWidget { public interface Callback { public Image createBusyImage(); public Widget createWaitingMessageWidget( Widget secondsRemaining ); public void requestingUpload( String filename ); public void timeout( String filename ); public void parseResponse( String fileName, String pHtmlResponse ); } private static int instance = 1; private final FileUpload upload = createFileUploadWidget(); private final FormPanel formPanel = createFormPanel( upload ); private final SimplePanel viewPort = createViewPort( createFormFloater( formPanel ) ); private final ButtonBase illusionaryClickWidget, removeButton; private final Widget sizingWidget; private final int secondsToWait; private final Callback callback; private boolean externallyEnabled; private String lastSubmittedFileName; private String servletPath; private Timer timer; private boolean sized = false; public UploadWidget( ButtonBase illusionaryClickWidget, ButtonBase removeButton, int secondsToWait, Callback callback ) { this.removeButton = removeButton; this.secondsToWait = secondsToWait; this.callback = callback; externallyEnabled = illusionaryClickWidget.isEnabled(); sizingWidget = createConstrainer( this.illusionaryClickWidget = illusionaryClickWidget ); initWidget( createStylingDiv( "UploadWidget", createConstrainer( createFlowPanel( sizingWidget, viewPort ) ) ) ); //<div style="display: block; width: 100px; height: 20px; overflow: hidden;"> //<button style="width: 110px; height: 30px; position: relative; top: -5px; left: -5px;"><a href="javascript: void(0)">Upload File</a></button> //<input type="file" id="upload_input" name="upload" style="font-size: 50px; width: 120px; opacity: 0; filter:alpha(opacity: 0); position: relative; // top: -40px;; left: -20px" /> //</div> formPanel.addSubmitCompleteHandler( new FormPanel.SubmitCompleteHandler() { @Override public void onSubmitComplete( FormPanel.SubmitCompleteEvent event ) { submitResponse( event.getResults() ); } } ); } public void setServletPath( String url ) { servletPath = noEmpty( url ); } public void setEnabled( boolean enable ) { enableWidgets( externallyEnabled = enable ); } private void enableWidgets( boolean enable ) { enable &= externallyEnabled; removeButton.setEnabled( enable ); illusionaryClickWidget.setEnabled( enable ); upload.setEnabled( enable ); } @Override protected void onAttach() { super.onAttach(); startTimer(); } @Override protected void onDetach() { stopTimer(); super.onDetach(); } private void stopTimer() { if ( timer != null ) { timer.cancel(); timer = null; } } private void startTimer() { stopTimer(); (timer = new Timer() { @Override public void run() { sized = sized || size(); String filename = noEmpty( upload.getFilename() ); if ( filename != null ) { stopTimer(); submitForm( lastSubmittedFileName = filename ); formPanel.reset(); } } }).scheduleRepeating( 250 ); } private boolean size() { int width = sizingWidget.getOffsetWidth(); int height = sizingWidget.getOffsetHeight(); if ( (width < 16) || (height < 16) ) { return false; } viewPort.setSize( width + "px", height + "px" ); return true; } private void resetUploadWidget() { enableWidgets( true ); startTimer(); } private String noEmpty( String string ) { if ( string != null ) { if ( (string = string.trim()).length() != 0 ) { return string; } } return null; } private void submitForm( String filename ) { System.out.println( "UploadWidget.submitForm: " + filename + " to " + servletPath ); if ( servletPath == null ) { Window.alert( "No Servlet Path Set" ); return; } callback.requestingUpload( filename ); formPanel.setAction( servletPath ); formPanel.submit(); enableWidgets( false ); showBusy(); } private void timeout() { hideBusy(); resetUploadWidget(); callback.timeout( lastSubmittedFileName ); } private void submitResponse( String htmlResponse ) { hideBusy(); resetUploadWidget(); callback.parseResponse( lastSubmittedFileName, htmlResponse ); } private static Widget createConstrainer( Widget widget ) { HorizontalPanel constrainer = new HorizontalPanel(); constrainer.add( widget ); return constrainer; } private static Widget createStylingDiv( String styleName, Widget widget ) { SimplePanel divBasePanel = new SimplePanel(); divBasePanel.addStyleName( styleName ); divBasePanel.setWidget( widget ); return divBasePanel; } private static Widget createFlowPanel( Widget widget1, Widget widget2 ) { FlowPanel panel = new FlowPanel(); panel.getElement().getStyle().setPosition( Style.Position.RELATIVE ); panel.add( widget1 ); panel.add( widget2 ); return panel; } private static SimplePanel createViewPort( Widget widget ) { SimplePanel viewPort = new SimplePanel(); Element element = viewPort.getElement(); Style style = element.getStyle(); style.setPosition( Style.Position.ABSOLUTE ); style.setLeft( 0, Style.Unit.PX ); style.setTop( 0, Style.Unit.PX ); style.setOverflow( Style.Overflow.HIDDEN ); viewPort.setWidget( widget ); viewPort.setSize( "1px", "1px" ); return viewPort; } private static SimplePanel createFormFloater( Widget widget ) { SimplePanel panel = new SimplePanel(); panel.setSize( "1000px", "400px" ); Style style = panel.getElement().getStyle(); style.setPosition( Style.Position.RELATIVE ); style.setLeft( -600, Style.Unit.PX ); style.setTop( -5, Style.Unit.PX ); panel.setWidget( createConstrainer( widget ) ); return panel; } private static FormPanel createFormPanel( FileUpload upload ) { FormPanel form = new FormPanel(); form.add( upload ); Style style = form.getElement().getStyle(); style.setMargin( 0, Style.Unit.PX ); style.setPadding( 0, Style.Unit.PX ); // Because we're going to add a FileUpload widget, we'll need to set the // form to use the POST method, and multipart MIME encoding. form.setEncoding( FormPanel.ENCODING_MULTIPART ); form.setMethod( FormPanel.METHOD_POST ); return form; } private static FileUpload createFileUploadWidget() { FileUpload upload = new FileUpload(); upload.setName( "UploadWidget" + instance++ ); upload.getElement().setAttribute( "size", "1" ); upload.setSize( "1000px", "400px" ); Style style = upload.getElement().getStyle(); style.setMargin( 0, Style.Unit.PX ); style.setPadding( 0, Style.Unit.PX ); style.setBorderWidth( 0, Style.Unit.PX ); style.setFontSize( 200, Style.Unit.PX ); style.setOpacity( 0 ); // Tested w/ FireFox & IE8! return upload; } protected void hideBusy() { if ( busyPopup != null ) { busyPopup.hide(); busyPopup = null; } } protected void showBusy() { hideBusy(); (busyPopup = new OurBusyPopup()).setPopupPositionAndShow( new PopupPanel.PositionCallback() { @Override public void setPosition( int offsetWidth, int offsetHeight ) { int left = (Window.getClientWidth() - offsetWidth) / 2; int top = (Window.getClientHeight() - offsetHeight) / 2; busyPopup.setPopupPosition( left, top ); } } ); } private OurBusyPopup busyPopup; private class OurBusyPopup extends PopupPanel { private Widget messageWidget; private boolean messageShowing = false; private int secondsRemaining = secondsToWait; private Label secondsRemainingLabel = new Label( "" + secondsRemaining ); private long started = System.currentTimeMillis(); private float currentOpacity = 0; private Timer timer; private OurBusyPopup() { setModal( true ); setGlassEnabled( true ); getGlassElement().getStyle().setBackgroundColor( "#fff" ); getGlassElement().getStyle().setCursor( Style.Cursor.WAIT ); getGlassElement().getStyle().setOpacity( currentOpacity ); VerticalPanel outerpanel = new VerticalPanel(); outerpanel.setStyleName( "UploadWidgetBusyContainer" ); outerpanel.setHorizontalAlignment( HasHorizontalAlignment.ALIGN_CENTER ); Image busyImage = callback.createBusyImage(); if ( busyImage != null ) { outerpanel.add( busyImage ); } outerpanel.add( createStylingDiv( "UploadWidgetBusyMessage", callback.createWaitingMessageWidget( secondsRemainingLabel ) ) ); outerpanel.getElement().getStyle().setVisibility( Style.Visibility.HIDDEN ); setWidget( messageWidget = outerpanel ); startTimer(); } @Override public void hide() { stopTimer(); super.hide(); } private void stopTimer() { if ( timer != null ) { timer.cancel(); timer = null; } } private void startTimer() { stopTimer(); (timer = new Timer() { @Override public void run() { if ( currentOpacity < 0.75 ) { getGlassElement().getStyle().setOpacity( currentOpacity += 0.025 ); } int secondsPassed = (int) ((System.currentTimeMillis() - started) / 1000); if ( (secondsPassed > 1) && !messageShowing ) { messageShowing = true; messageWidget.getElement().getStyle().setVisibility( Style.Visibility.VISIBLE ); } int calcSecondsRemaining = secondsToWait - secondsPassed; if ( calcSecondsRemaining < 1 ) { stopTimer(); timeout(); return; } if ( calcSecondsRemaining != secondsRemaining ) { secondsRemainingLabel.setText( (secondsRemaining = calcSecondsRemaining) + "" ); } } }).scheduleRepeating( 100 ); } } } |
Commits for litesoft/trunk/GWT_Sandbox/Upload/src/org/litesoft/sandbox/csapp/client/widgets/UploadWidget.java
Revision | Author | Commited | Message |
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948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
537 Diff | GeorgeS | Sun 02 Oct, 2011 17:58:21 +0000 | |
536 Diff | GeorgeS | Sun 02 Oct, 2011 00:36:06 +0000 | |
535 Diff | GeorgeS | Fri 30 Sep, 2011 18:34:03 +0000 | ! |
533 Diff | GeorgeS | Fri 30 Sep, 2011 17:25:49 +0000 | |
531 Diff | GeorgeS | Thu 29 Sep, 2011 20:58:34 +0000 | Working... |
529 Diff | GeorgeS | Thu 29 Sep, 2011 05:31:12 +0000 | |
528 Diff | GeorgeS | Thu 29 Sep, 2011 04:05:38 +0000 | More |
527 Diff | GeorgeS | Thu 29 Sep, 2011 01:17:00 +0000 | |
526 | GeorgeS | Thu 29 Sep, 2011 00:55:24 +0000 |