开源Qt控件集合：QSint
一个开源的Qt小组件程序，提供了包括棒图、饼图、曲线等小组件。
Widgets Gallery - Core module
 | ActionLabel An action button, similar to Windows Vista/7 control panel item. |
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 | ActionBox A panel of actions, similar to Windows Vista/7 control panel items. |
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 | ActionPanel ActionGroup A panel of actions, similar to Windows XP task panel items. Following styles available:
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 | ColorGrid Class for visual selection of a color from the color grid. ColorButton A tool button to select a color from color dialog or grid. |
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 | RecentFiles Class for representing recently opened files as a QMenu. |
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 | ScrollPanner 2-dimensional scrolling widget. |
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 | TabListMenu Class for representing drop-down menu of QTabWidget's tabs. |
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 | PathPicker Class for editing a directory path by picking it visually. |
Widgets Gallery - Charts module
 | BarChartPlotter Represents Qt model as a sequence of Columns. |
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 | BarChartPlotter Represents Qt model as a set of Stacked columns. |
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 | BarChartPlotter Represents Qt model as a sequence of trends. |
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 | PieChart Represents Qt model as a Piechart diagramm. |