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Diffstat (limited to 'Libraries/LibGUI/ModelEditingDelegate.h')
-rw-r--r-- | Libraries/LibGUI/ModelEditingDelegate.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/Libraries/LibGUI/ModelEditingDelegate.h b/Libraries/LibGUI/ModelEditingDelegate.h new file mode 100644 index 0000000000..5b8efeed20 --- /dev/null +++ b/Libraries/LibGUI/ModelEditingDelegate.h @@ -0,0 +1,90 @@ +/* + * 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: + ModelEditingDelegate() {} + 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; + + virtual Variant value() const = 0; + virtual void set_value(const Variant&) = 0; + + virtual void will_begin_editing() {} + +protected: + virtual RefPtr<Widget> create_widget() = 0; + void commit() + { + if (on_commit) + on_commit(); + } + +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(nullptr); + textbox->on_return_pressed = [this] { + commit(); + }; + return textbox; + } + virtual Variant value() const override { return static_cast<const TextBox*>(widget())->text(); } + virtual void set_value(const Variant& value) override { static_cast<TextBox*>(widget())->set_text(value.to_string()); } +}; + +} |