Inkscape::Pref< T > Struct Template Reference

Proxy object providing a "live value" interface. More...

#include <preferences.h>

Detailed Description

template<typename T>
struct Inkscape::Pref< T >

Proxy object providing a "live value" interface.

A Pref<T> tracks a preference value. For the most part it behaves just like a T. For example

auto mybool = Pref<bool>("/path/to/mybool");

can be used as a bool. The only difference is that it updates whenever the preference updates, and allows you to perform an action when it does. For example,

mybool.action = [&] { std::cout << mybool << std::endl; };

will cause the new value to be printed after each subsequent change. Pref<T> can be temporarily disabled with a call to

mybool.set_enabled(false);

during which time it will revert to its default value and ignore further updates until re-enabled again.

• Most common types T are implemented. Feel free to add more as needed.
• Pref<void> allows listening for updates to a whole group of preferences. Although this entirely duplicates existing preferences functionality, it is provided for consistency.

Definition at line 803 of file preferences.h.

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The documentation for this struct was generated from the following file:

• /builds/inkscape/inkscape/src/preferences.h