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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGUI/Model.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/Widget.h>
namespace GUI {
class ModelEditingDelegate {
public:
enum SelectionBehavior {
DoNotSelect,
SelectAll,
};
virtual ~ModelEditingDelegate() { }
void bind(Model& model, const ModelIndex& index)
{
if (m_model.ptr() == &model && m_index == index)
return;
m_model = model;
m_index = index;
m_widget = create_widget();
}
Widget* widget() { return m_widget; }
const Widget* widget() const { return m_widget; }
Function<void()> on_commit;
Function<void()> on_rollback;
Function<void()> on_change;
virtual Variant value() const = 0;
virtual void set_value(Variant const&, SelectionBehavior selection_behavior = SelectionBehavior::SelectAll) = 0;
virtual void will_begin_editing() { }
protected:
ModelEditingDelegate() { }
virtual RefPtr<Widget> create_widget() = 0;
void commit()
{
if (on_commit)
on_commit();
}
void rollback()
{
if (on_rollback)
on_rollback();
}
void change()
{
if (on_change)
on_change();
}
const ModelIndex& index() const { return m_index; }
private:
RefPtr<Model> m_model;
ModelIndex m_index;
RefPtr<Widget> m_widget;
};
class StringModelEditingDelegate : public ModelEditingDelegate {
public:
StringModelEditingDelegate() { }
virtual ~StringModelEditingDelegate() override { }
virtual RefPtr<Widget> create_widget() override
{
auto textbox = TextBox::construct();
textbox->set_frame_shape(Gfx::FrameShape::NoFrame);
textbox->on_return_pressed = [this] {
commit();
};
textbox->on_escape_pressed = [this] {
rollback();
};
textbox->on_change = [this] {
change();
};
return textbox;
}
virtual Variant value() const override { return static_cast<const TextBox*>(widget())->text(); }
virtual void set_value(Variant const& value, SelectionBehavior selection_behavior) override
{
auto& textbox = static_cast<TextBox&>(*widget());
textbox.set_text(value.to_string());
if (selection_behavior == SelectionBehavior::SelectAll)
textbox.select_all();
}
};
}
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