/* * 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. */ #include <LibGUI/Button.h> #include <LibGUI/ComboBox.h> #include <LibGUI/Desktop.h> #include <LibGUI/ListView.h> #include <LibGUI/Model.h> #include <LibGUI/ScrollBar.h> #include <LibGUI/TextBox.h> #include <LibGUI/Window.h> namespace GUI { class ComboBoxEditor final : public TextEditor { C_OBJECT(ComboBoxEditor); public: Function<void(int delta)> on_mousewheel; private: ComboBoxEditor() : TextEditor(TextEditor::SingleLine) { } virtual void mousewheel_event(MouseEvent& event) override { if (on_mousewheel) on_mousewheel(event.wheel_delta()); } }; ComboBox::ComboBox() { m_editor = add<ComboBoxEditor>(); m_editor->on_change = [this] { if (on_change) on_change(m_editor->text(), m_list_view->selection().first()); }; m_editor->on_return_pressed = [this] { if (on_return_pressed) on_return_pressed(); }; m_open_button = add<Button>(); m_open_button->set_focusable(false); m_open_button->set_text("\xE2\xAC\x87"); // DOWNWARDS BLACK ARROW m_open_button->on_click = [this](auto) { if (m_list_window->is_visible()) close(); else open(); }; m_list_window = add<Window>(); m_list_window->set_frameless(true); m_list_view = m_list_window->set_main_widget<ListView>(); m_list_view->horizontal_scrollbar().set_visible(false); m_list_view->on_selection = [this](auto& index) { ASSERT(model()); auto new_value = model()->data(index).to_string(); m_editor->set_text(new_value); if (!m_only_allow_values_from_model) m_editor->select_all(); close(); deferred_invoke([this, index](auto&) { if (on_change) on_change(m_editor->text(), index); }); }; m_editor->on_mousewheel = [this](int delta) { m_list_view->move_selection(delta); }; } ComboBox::~ComboBox() { } void ComboBox::resize_event(ResizeEvent& event) { int frame_thickness = m_editor->frame_thickness(); int button_height = event.size().height() - frame_thickness * 2; int button_width = 15; m_open_button->set_relative_rect(width() - button_width - frame_thickness, frame_thickness, button_width, button_height); m_editor->set_relative_rect(0, 0, width(), height()); } void ComboBox::set_model(NonnullRefPtr<Model> model) { m_list_view->set_model(move(model)); } void ComboBox::set_selected_index(size_t index) { auto model = this->m_list_view->model(); auto model_index = model->index(index, 0); if (model->is_valid(model_index)) this->m_list_view->selection().set(model_index); } void ComboBox::select_all() { m_editor->select_all(); } void ComboBox::open() { if (!model()) return; auto my_screen_rect = screen_relative_rect(); int longest_item_width = 0; for (int i = 0; i < model()->row_count(); ++i) { auto index = model()->index(i); auto item_text = model()->data(index).to_string(); longest_item_width = max(longest_item_width, m_list_view->font().width(item_text)); } Gfx::Size size { max(width(), longest_item_width + m_list_view->width_occupied_by_vertical_scrollbar() + m_list_view->frame_thickness() * 2 + m_list_view->horizontal_padding()), model()->row_count() * m_list_view->item_height() + m_list_view->frame_thickness() * 2 }; Gfx::Rect list_window_rect { my_screen_rect.bottom_left(), size }; list_window_rect.intersect(Desktop::the().rect().shrunken(0, 128)); m_list_window->set_rect(list_window_rect); m_list_window->show(); } void ComboBox::close() { m_list_window->hide(); m_editor->set_focus(true); } String ComboBox::text() const { return m_editor->text(); } void ComboBox::set_text(const String& text) { m_editor->set_text(text); } void ComboBox::set_only_allow_values_from_model(bool b) { if (m_only_allow_values_from_model == b) return; m_only_allow_values_from_model = b; m_editor->set_readonly(m_only_allow_values_from_model); } Model* ComboBox::model() { return m_list_view->model(); } const Model* ComboBox::model() const { return m_list_view->model(); } int ComboBox::model_column() const { return m_list_view->model_column(); } void ComboBox::set_model_column(int column) { m_list_view->set_model_column(column); } }