| author | John Kern <johnk@symbian.org> |
| Tue, 11 May 2010 10:45:33 -0700 | |
| changeset 326 | e2a66d30f677 |
| parent 230 | 7848c135d915 |
| permissions | -rw-r--r-- |
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<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<html lang="en" xml:lang="en"> |
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<head> |
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<meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> |
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<meta name="copyright" content="(C) Copyright 2005" /> |
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<meta name="DC.rights.owner" content="(C) Copyright 2005" /> |
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<meta content="concept" name="DC.Type" /> |
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<meta name="DC.Title" content="Selections" /> |
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<meta scheme="URI" name="DC.Relation" content="WRTKit_Developing_widgets_using_the_WRTKit-GUID-a321db96-0a01-4e55-b24b-96905f40cb5c.html" /> |
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<meta content="XHTML" name="DC.Format" /> |
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<meta content="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919" name="DC.Identifier" /> |
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<meta content="en" name="DC.Language" /> |
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<link href="commonltr.css" type="text/css" rel="stylesheet" /> |
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<title> |
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Selections</title> |
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</head> |
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<body id="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919"><a name="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919"><!-- --></a> |
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<h1 class="topictitle1"> |
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Selections</h1> |
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<div> |
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<p> |
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Selection of one or more options from a set of options is one of the most common |
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use cases in a user interface. The WRTKit supports this use case with two |
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controls, SelectionList and SelectionMenu, each of which can be in either |
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"single selection" or "multiple selection" mode. The two controls differe only |
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in look and interaction but not in their APIs. |
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</p> |
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<p> |
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The SelectionList control shows an expanded list of all of its options in the |
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view. If the control is in single selection mode then each option is presented |
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with a "radio button", of which only one can be selected at a time. This ensures |
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that only one of the options can be selected by the user. If the SelectionList |
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control is in multiple selection mode then each option is presented with a |
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"checkbox". Any amount (including zero) of checkboxes can be checked at time, |
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allowing users to select multiple options. The SelectionList control is a hybrid |
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between the traditional way of showing radio buttons and checkboxes in a web |
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environment and the way that an S60 application shows single and multiple choice |
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selections. The SelectionList is recommeded to be used when the widget is using |
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the pointer navigation mode or when there are only a few options. |
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</p> |
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<div class="fignone" id="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919__GUID-BE87E376-AF72-4533-909F-5ED5A022DE5C"><a name="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919__GUID-BE87E376-AF72-4533-909F-5ED5A022DE5C"><!-- --></a><span class="figcap">Figure 1. |
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SelectionList controls</span> |
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<br /><img src="SelectionList_Controls_Screenshot_1.png" /><br /> |
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</div> |
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<p> |
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The SelectionMenu control is more similar to the way normal S60 applications |
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allow users to make single or multiple choices. The SelectionMenu takes up only |
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minimally of space in its normal state, but when activated it pops up up a list |
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of options with either radio buttons (for single selection) or checkboxes (for |
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multiple selection) that the user can select. The SelectionMenu control is good |
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for the tab navigation mode or if there are many options that would use up lots |
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of space on the screen using the SelectionList control. |
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</p> |
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<div class="fignone" id="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919__GUID-B78AFE71-FE80-4CAB-BF67-79D8D81F744A"><a name="GUID-23145D13-F2E7-48BE-B24B-BC49754B2919__GUID-B78AFE71-FE80-4CAB-BF67-79D8D81F744A"><!-- --></a><span class="figcap">Figure 2. |
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SelectionMenu control</span> |
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<br /><img src="SelectionMenu_Control_Screenshot_1.png" /><br /> |
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</div> |
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<p> |
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Options in the selection controls are specified as an array of JavaScript |
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objects, where each object represents one option. Each option object has two |
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properties: value and text. The value property can be any JavaScript value, |
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including object references and is used to represent the concrete value of the |
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option. The text property is used to display the option in the user interface. |
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The value could for example be a boolean true or false while the |
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text could be "Yes" or "No". |
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</p> |
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<p> |
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The set of currently selected options can be set or retrieved from a selection |
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control using getter and setter methods. For single selection controls the |
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selected option is specified as a single reference to one of the options in the |
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control. For multiple selection the selected options are specified as an array |
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of references to zero or more of the options in the control. Note that the |
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references to the options must refer to the very same options that are in the |
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control - not other instances of the options even if they are identical in value |
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and/or text. |
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</p> |
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<p> |
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Selection controls fire "SelectionChanged" events when the user makes a |
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selection in the control. |
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</p> |
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</div> |
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<div> |
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<div class="familylinks"> |
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<div class="parentlink"><strong>Parent topic:</strong> <a href="WRTKit_Developing_widgets_using_the_WRTKit-GUID-a321db96-0a01-4e55-b24b-96905f40cb5c.html">Developing widgets using the WRTKit</a></div> |
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</div> |
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Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff
changeset
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110 |
</div> |
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff
changeset
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111 |
|
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff
changeset
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112 |
</body> |
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff
changeset
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113 |
</html> |