aqt::cassowary::Solver Class Reference

Provides a context to register and resolve constraints. More...

#include <aqt/cassowary/Solver.hpp>

Inheritance diagram for aqt::cassowary::Solver:

Public Member Functions
	Solver (QQuickItem *pParent=nullptr)
Q_SIGNAL void	debugChanged (bool debug)
Public Member Functions inherited from aqt::cassowary::Contextual
	Contextual (QQuickItem *pParent=nullptr)
std::shared_ptr< Context >	context ()
std::shared_ptr< const Context >	context () const
Q_SIGNAL void	contextChanged ()
Q_SIGNAL void	extendChanged (aqt::cassowary::Contextual *extend)
Q_INVOKABLE void	commit ()
	Applies all the changes associated to the context used by this contextual. More...
Q_INVOKABLE void	defer (QJSValue cb)
	Executes the callback cb at the end of the next phase of updates in the solver, but before the changes are propagated to the bindings.
void	defer (Context::Callback cb)
void	defer_ (Context::Callback cb)
template<typename... Args>
void	log (Args &&...args)
	Used to log a debug trace, that may be visible when the current context's debug property is set. More...

Protected Member Functions
void	updatePolish () override
void	componentComplete () override
std::shared_ptr< Context >	provided () override
void	addIn (Context &) override
void	removeIn (Context &) override
Protected Member Functions inherited from aqt::cassowary::Contextual
void	add ()
void	remove ()
template<typename Fn >
void	update (Fn &&cb)
template<typename Fn >
Context::Callback	guarded (Fn fn)
void	updateContext ()
Contextual *	provider ()

Properties
bool	debug
	Toggles debug traces for the context provided by this solver. More...
Properties inherited from aqt::cassowary::Contextual
aqt::cassowary::Contextual	extend
	If non-null, this contextual will use the same context as used by this contextual.

Detailed Description

Provides a context to register and resolve constraints.

It may as well simply extend another context, following the normal rules of Contextuals.

Note that the solver does not resolve the equations until the next redraw of the screen. This prevents intermediate values to confuse the solver during binding propagations, as well as improves performance as only the minimal set of updates to visualize new layouts is performed. If needed (e.g. in tests) one may manually update the system with the commit() method.

Example

Solver {}

Import in QML

import Aqt.Cassowary 1.0

Since

1.0

See also

Contextual

Property Documentation

bool aqt::cassowary::Solver::debug

Toggles debug traces for the context provided by this solver.

This has no effect if the solver is simply extending another context. Also:

• The debug traces may are still affected by the general Qt logging filters.
• Debug traces will never be shown if NDEBUG is defined at compilation time.

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

• src/aqt/cassowary/Solver.hpp