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12dfeb9845
In the StringModelEditingDelegate convenience class, we simply hook up the escape key to editor rollback. This means you can cancel an ongoing cell edit by pressing escape. :^)
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibGUI/Model.h>
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#include <LibGUI/TextBox.h>
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#include <LibGUI/Widget.h>
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namespace GUI {
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class ModelEditingDelegate {
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public:
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virtual ~ModelEditingDelegate() { }
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void bind(Model& model, const ModelIndex& index)
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{
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if (m_model.ptr() == &model && m_index == index)
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return;
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m_model = model;
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m_index = index;
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m_widget = create_widget();
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}
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Widget* widget() { return m_widget; }
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const Widget* widget() const { return m_widget; }
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Function<void()> on_commit;
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Function<void()> on_rollback;
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virtual Variant value() const = 0;
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virtual void set_value(const Variant&) = 0;
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virtual void will_begin_editing() { }
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protected:
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ModelEditingDelegate() { }
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virtual RefPtr<Widget> create_widget() = 0;
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void commit()
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{
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if (on_commit)
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on_commit();
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}
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void rollback()
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{
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if (on_rollback)
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on_rollback();
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}
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const ModelIndex& index() const { return m_index; }
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private:
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RefPtr<Model> m_model;
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ModelIndex m_index;
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RefPtr<Widget> m_widget;
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};
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class StringModelEditingDelegate : public ModelEditingDelegate {
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public:
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StringModelEditingDelegate() { }
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virtual ~StringModelEditingDelegate() override { }
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virtual RefPtr<Widget> create_widget() override
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{
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auto textbox = TextBox::construct();
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textbox->on_return_pressed = [this] {
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commit();
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};
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textbox->on_escape_pressed = [this] {
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rollback();
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};
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return textbox;
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}
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virtual Variant value() const override { return static_cast<const TextBox*>(widget())->text(); }
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virtual void set_value(const Variant& value) override { static_cast<TextBox*>(widget())->set_text(value.to_string()); }
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};
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}
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