| author | Eugene Ostroukhov <eugeneo@symbian.org> |
| Wed, 07 Apr 2010 13:34:34 -0700 | |
| changeset 299 | a240ab689b9b |
| parent 230 | 7848c135d915 |
| permissions | -rw-r--r-- |
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7848c135d915
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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="Terminology" /> |
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<meta scheme="URI" name="DC.Relation" content="WRTKit_Overview_of_the_WRTKit-GUID-14c414f6-a220-40b6-8614-df13141495ab.html" /> |
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<meta content="XHTML" name="DC.Format" /> |
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<meta content="GUID-EBD8D7C4-03F6-498D-BECC-EB8D4081ED8B" 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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Terminology</title> |
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</head> |
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<body id="GUID-EBD8D7C4-03F6-498D-BECC-EB8D4081ED8B"><a name="GUID-EBD8D7C4-03F6-498D-BECC-EB8D4081ED8B"><!-- --></a> |
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<h1 class="topictitle1"> |
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Terminology</h1> |
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<div> |
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<div class="section"><h2 class="sectiontitle"> |
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Control</h2> |
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<p> |
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A control is a user interface element that the user can interact with. Controls |
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are used in PC applications, in web pages and in mobile device applications. In |
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web pages controls are often known as "form controls". Common controls include |
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textfields, textareas, buttons, checkboxes, radio buttons, scrollbars, labels |
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and progress bars, among others. Not all controls are interactive, e.g. labels |
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simply display a value. Controls are contained within some kind of user |
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interface container such as a view or window. |
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</p> |
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<p> |
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In the WRTKit, controls are JavaScript objects that contain the state and |
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implement the behavior of the control. Controls take care of drawing themselves, |
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including changing their appearence as a result of various state changes. |
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</p> |
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</div> |
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<div class="section"><h2 class="sectiontitle"> |
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View</h2> |
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<p> |
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A container for user interface elements such as controls. On a mobile device |
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user interface views typically fill the entire screen and thus only one view can |
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be shown at a time. Views in a mobile device tend to lay out the elements it |
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contains in a vertical list that can be scrolled up and down if there is more |
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content in the view than what fits on the screen at a time. |
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</p> |
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<p> |
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In the WRTKit, views are responsible for laying out controls. Custom views can |
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be created to support advanced layouts but in the vast majority of cases the |
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default ListView is sufficient. WRTKit views are JavaScript objects. |
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</p> |
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</div> |
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<div class="section"><h2 class="sectiontitle"> |
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Event</h2> |
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<p> |
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An event is a notification of some occurrence in a user interface element, such |
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as a view or control. Events are typically propagated to application code as |
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messages or function calls or a combination of the two. |
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</p> |
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<p> |
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The WRTKit uses a model known as the "observer pattern" to deliver event |
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messages, which are JavaScript objects, to event listeners, which are JavaScript |
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callback functions. WRTKit events have a type name that can be used to |
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distinguish between different types of events. E.g. a button press produces an |
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"ActionPerformed" event. |
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</p> |
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</div> |
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<div class="section"><h2 class="sectiontitle"> |
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Focus</h2> |
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<p> |
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The control that is currently selected to receive input is said to be focused. |
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Controls can be focused in both the tab and pointer navigation modes. In the tab |
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mode the focus is moved between controls using the 4-way controller. In |
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the pointer mode the focus is moved between controls by moving the pointer to |
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"hover" above a control and then pressing a selection button to select that |
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control. Focused controls are displayed in a distinct way from other controls to |
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indicate that they are ready to be interacted with. |
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</p> |
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</div> |
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<div class="section"><h2 class="sectiontitle"> |
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Hovering</h2> |
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<p> |
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116 |
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117 |
In pointer navigation mode, the pointer is said to be "hovering" above a control |
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if the pointer is located inside the control's area on the screen. Hovering is |
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similar to focus, but differs because hovering in itself does not select a |
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120 |
control for interaction. Rather a selection key must be pressed in order to |
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121 |
focus the control that the pointer is currently hovering over. Hover is |
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indicated by displaying a control in a distinct way from other controls. |
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123 |
</p> |
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124 |
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125 |
</div> |
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126 |
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127 |
<div class="section"><h2 class="sectiontitle"> |
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Navigation mode</h2> |
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129 |
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130 |
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131 |
<p> |
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132 |
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133 |
A navigation mode refers to a method of selecting what user interface element to |
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134 |
interact with. The S60 Web Runtime supports two navigation modes: "tab" and |
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135 |
"pointer". In the tab mode, focus is moved between controls using the 4-way |
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136 |
controller. In pointer mode there is a pointer arrow on the screen that can be |
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moved freely using the 4-way controller. A control is focused by moving the |
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138 |
pointer arrow so that it hovers above a control, and then pressing a selection |
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139 |
key to select that control. In tab mode a control can be either in normal or |
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focused state, whereas in the pointer mode a control can be in normal, hover or |
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focused state. |
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142 |
</p> |
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143 |
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144 |
</div> |
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145 |
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146 |
</div> |
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147 |
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148 |
<div> |
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149 |
<div class="familylinks"> |
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150 |
<div class="parentlink"><strong>Parent topic:</strong> <a href="WRTKit_Overview_of_the_WRTKit-GUID-14c414f6-a220-40b6-8614-df13141495ab.html">Overview of the WRTKit</a></div> |
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151 |
</div> |
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152 |
</div> |
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153 |
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154 |
</body> |
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</html> |