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LibGUI: Allow finding the source of a GAction activation

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When a GAction is activated by a menu, or by a toolbar button, you can
now use GAction::activator() to get a pointer to whomever activated it.

This can be used to implement context-specific behaviors in situations
where the same action is exposed through multiple paths.

This addresses an issue that was brought up in #826.
This commit is contained in:
Andreas Kling 2019-12-09 21:25:48 +01:00
parent fd5eb79d19
commit 571c4d3fb8
Notes: sideshowbarker 2024-07-19 10:54:15 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/571c4d3fb81
4 changed files with 11 additions and 4 deletions
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5
Libraries/LibGUI/GAction.cpp
View File

@ -127,10 +127,13 @@ GAction::~GAction()
m_widget->unregister_local_shortcut_action({}, *this);
}
void GAction::activate()
void GAction::activate(CObject* activator)
{
if (activator)
m_activator = activator->make_weak_ptr();
if (on_activation)
on_activation(*this);
m_activator = nullptr;
}
void GAction::register_button(Badge<GButton>, GButton& button)

6
Libraries/LibGUI/GAction.h
View File

@ -69,9 +69,12 @@ public:
const GraphicsBitmap* icon() const { return m_icon.ptr(); }
void set_icon(const GraphicsBitmap* icon) { m_icon = icon; }
const CObject* activator() const { return m_activator.ptr(); }
CObject* activator() { return m_activator.ptr(); }
Function<void(GAction&)> on_activation;
void activate();
void activate(CObject* activator = nullptr);
bool is_enabled() const { return m_enabled; }
void set_enabled(bool);
@ -117,4 +120,5 @@ private:
HashTable<GMenuItem*> m_menu_items;
WeakPtr<GWidget> m_widget;
WeakPtr<GActionGroup> m_action_group;
WeakPtr<CObject> m_activator;
};

2
Libraries/LibGUI/GButton.cpp
View File

@ -69,7 +69,7 @@ void GButton::click()
if (on_click)
on_click(*this);
if (m_action)
m_action->activate();
m_action->activate(this);
}
bool GButton::supports_keyboard_activation() const

2
Libraries/LibGUI/GWindowServerConnection.cpp
View File

@ -209,7 +209,7 @@ void GWindowServerConnection::handle(const WindowClient::MenuItemActivated& mess
return;
}
if (auto* action = menu->action_at(message.identifier()))
action->activate();
action->activate(menu);
}
void GWindowServerConnection::handle(const WindowClient::WM_WindowStateChanged& message)