text_area_view.h

/*
**  UICore
**  Copyright (c) 1997-2015 The UICore Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries UICore may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
*/

#pragma once

#include "../View/view.h"
#include "../../Core/Math/size.h"
#include "../../Core/Math/vec2.h"
#include "label_view.h"

namespace uicore
{
    class TextAreaBaseViewImpl;

    class TextAreaBaseView : public View
    {
    public:
        TextAreaBaseView();
        ~TextAreaBaseView();

        Size preferred_size() const;
        void set_preferred_size(Size num_characters);

        std::string text() const;
        void set_text(const std::string &value);

        std::string placeholder() const;
        void set_placeholder(const std::string &value);

        TextAlignment text_alignment() const;
        void set_text_alignment(TextAlignment value);

        bool is_read_only() const;
        void set_read_only(bool value = true);

        std::string selection() const;
        Vec2i selection_start() const;
        Vec2i selection_end() const;
        void set_selection(Vec2i head, Vec2i tail);
        void clear_selection();
        void delete_selected_text();
        void select_all();

        Vec2i cursor_pos() const;
        void set_cursor_pos(Vec2i pos);
        void set_cursor_drawing_enabled(bool value);

        Signal<void(KeyEvent *)> &sig_before_edit_changed();
        Signal<void(KeyEvent *)> &sig_after_edit_changed();
        Signal<void()> &sig_selection_changed();
        Signal<void(KeyEvent *)> &sig_enter_pressed();

    protected:
        void render_content(const CanvasPtr &canvas) override;
        float calculate_preferred_width(const CanvasPtr &canvas) override;
        float calculate_preferred_height(const CanvasPtr &canvas, float width) override;
        float calculate_first_baseline_offset(const CanvasPtr &canvas, float width) override;
        float calculate_last_baseline_offset(const CanvasPtr &canvas, float width) override;

    private:
        std::unique_ptr<TextAreaBaseViewImpl> impl;
    };
}