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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <LibGUI/Model.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/Widget.h>
namespace GUI {
class ModelEditingDelegate {
public:
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;
virtual Variant value() const = 0;
virtual void set_value(const Variant&) = 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();
}
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->on_return_pressed = [this] {
commit();
};
textbox->on_escape_pressed = [this] {
rollback();
};
return textbox;
}
virtual Variant value() const override { return static_cast<const TextBox*>(widget())->text(); }
virtual void set_value(const Variant& value) override
{
auto& textbox = static_cast<TextBox&>(*widget());
textbox.set_text(value.to_string());
textbox.select_all();
}
};
}
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