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-rw-r--r--Libraries/LibGUI/ModelEditingDelegate.h90
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diff --git a/Libraries/LibGUI/ModelEditingDelegate.h b/Libraries/LibGUI/ModelEditingDelegate.h
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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:
+ 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()); }
+};
+
+}