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mZ ee� dS )z�Tools for displaying tool-tips.
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* an abstract base-class for different kinds of tooltips
* a simple text-only Tooltip class
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dS )�TooltipBasez abstract base class for tooltipsc C s || _ d| _dS )z�Create a tooltip.
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� ZS )�OnHoverTooltipBasez?abstract base class for tooltips, with delayed on-hover display�� c sV t t| ��|� || _d| _| j�d| j�| _| j�d| j �| _
| j�d| j �| _dS )aq Create a tooltip with a mouse hover delay.
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hover_delay: time to delay before showing the tooltip, in milliseconds
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e.g. after hovering over the anchor widget with the mouse for enough
time.
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