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LibGUI: Add convenient helpers for getting the sibling of a ModelIndex

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This commit is contained in:
Andreas Kling 2021-04-11 12:14:46 +02:00
parent 10d9a8db71
commit 0c02dfcad5
2 changed files with 20 additions and 2 deletions
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17
Userland/Libraries/LibGUI/ModelIndex.cpp
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -39,4 +39,19 @@ Variant ModelIndex::data(ModelRole role) const
return model()->data(*this, role); return model()->data(*this, role);
} }
ModelIndex ModelIndex::sibling(int row, int column) const
{
if (!is_valid())
return {};
VERIFY(model());
return model()->index(row, column, parent());
}
ModelIndex ModelIndex::sibling_at_column(int column) const
{
if (!is_valid())
return {};
return sibling(row(), column);
}
} }

5
Userland/Libraries/LibGUI/ModelIndex.h
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org> * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -61,6 +61,9 @@ public:
Variant data(ModelRole = ModelRole::Display) const; Variant data(ModelRole = ModelRole::Display) const;
ModelIndex sibling(int row, int column) const;
ModelIndex sibling_at_column(int column) const;
private: private:
ModelIndex(const Model& model, int row, int column, void* internal_data) ModelIndex(const Model& model, int row, int column, void* internal_data)
: m_model(&model) : m_model(&model)