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| == Guidelines ==
| | {{ Moved To Community | KDE_Visual_Design_Group/HIG/Dialogs }} |
| === Positioning ===
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| * Always keep dialogs on top of their parent.
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| ::{|
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| | [[Image:DialogPositionParentBad.png]]
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| | {{BadUsability}}
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| |- | |
| | [[Image:DialogsPositioningParentGood.png]]
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| | {{GoodUsability}}
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| |}
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| ::This is usually taken care of by the window manager. But in composed applications, focus problems may occur. Check carefully in this case.
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| * If reference in the parent window is required, make sure your dialog does not cover relevant parts. <br><small>For example a find dialog should neither be centered, nor cover a search result.</small>
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| === Interaction ===
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| * Set input focus on confirmation button.
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| === Reduce the dialog flood ===
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| * Do not nest dialogs more than two levels deep. <br><small>For example "Configuration dialog > Advanced dialog" is ok, "Configuration dialog > Advanced dialog > Further settings dialog" is too deep.</small>
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| * Avoid dialogs that contain only one or two options. If possible, use [[Design_and_Layout:Interaction:Input#Inline Editing|inline-editing]] instead.
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| * Do not use dialogs to display non-critical messages which do not require any further user interaction (typically dialogs with a single "OK" or "Close" button). Use [[Guidelines:Info Panel|info panels]] instead.
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| === Modal dialogs ===
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| * Use modal dialogs only if allowing interaction with other parts of the application while the window is opened could cause data loss or some other serious problem.
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| * Provide a clear way of leaving the modal dialog, such as a Cancel button.
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| === Dialog Layout ===
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| * Dialogs should not be bigger than 800x600 pixels and should always be resizable
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| * Make sure there is at least one third white space, do not overload the panel.
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| * The reading direction in dialogs is left to right, top to bottom.
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| * Dialogs are grouped in meaningful sections. The actions are grouped along their context of use, not along technical relations.
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| * Each section has a title.
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| * Labels are right-aligned, input widgets are left aligned.
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| * Provide one or two major vertical axis in your dialog that guide the user's attention.<br>The vertical line where the right aligned labels and the left aligned input widgets meet is one such example.
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| * Widgets which are subordinate to another widget are indented. If their enabled state depends on the parent widget, create an appropriate slot.
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| Otherwise, follow the guidelines described in [[Projects/Usability/HIG/Form_Label_Alignment|Form: Label Alignment]]
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| == Implementation ==
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| * [http://api.kde.org/4.10-api/kdelibs-apidocs/kdeui/html/classKDialog.html KDialog]
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| == See Also ==
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| * [[Projects/Usability/HIG/Tabs_Pages|Tabs and Pages in Dialogs]]
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| * [[Projects/Usability/HIG/Form_Label_Alignment|Form: Label Alignment]]
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