ListBox.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2020 Bruno Van de Velde (vdv_b@tgui.eu)
//
// 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.
//
 
 
#ifndef TGUI_LIST_BOX_HPP
#define TGUI_LIST_BOX_HPP
 
 
#include <TGUI/CopiedSharedPtr.hpp>
#include <TGUI/Widgets/Scrollbar.hpp>
#include <TGUI/Renderers/ListBoxRenderer.hpp>
#include <TGUI/Text.hpp>
 
 
namespace tgui
{
    class TGUI_API ListBox : public Widget
    {
      public:
 
        typedef std::shared_ptr<ListBox> Ptr; 
        typedef std::shared_ptr<const ListBox> ConstPtr; 
 
 
        // Default constructor
        ListBox();
 
 
        static ListBox::Ptr create();
 
 
        static ListBox::Ptr copy(ListBox::ConstPtr listBox);
 
 
        ListBoxRenderer* getSharedRenderer();
        const ListBoxRenderer* getSharedRenderer() const;
 
        ListBoxRenderer* getRenderer();
        const ListBoxRenderer* getRenderer() const;
 
 
        void setPosition(const Layout2d& position) override;
        using Widget::setPosition;
 
 
        void setSize(const Layout2d& size) override;
        using Widget::setSize;
 
 
        bool addItem(const sf::String& itemName, const sf::String& id = "");
 
 
        bool setSelectedItem(const sf::String& itemName);
 
 
        bool setSelectedItemById(const sf::String& id);
 
 
        bool setSelectedItemByIndex(std::size_t index);
 
 
        void deselectItem();
 
 
        bool removeItem(const sf::String& itemName);
 
 
        bool removeItemById(const sf::String& id);
 
 
        bool removeItemByIndex(std::size_t index);
 
 
        void removeAllItems();
 
 
        sf::String getItemById(const sf::String& id) const;
 
 
        sf::String getItemByIndex(std::size_t index) const;
 
 
        int getIndexById(const sf::String& id) const;
 
 
        sf::String getIdByIndex(std::size_t index) const;
 
 
        sf::String getSelectedItem() const;
 
 
        sf::String getSelectedItemId() const;
 
 
        int getSelectedItemIndex() const;
 
 
        bool changeItem(const sf::String& originalValue, const sf::String& newValue);
 
 
        bool changeItemById(const sf::String& id, const sf::String& newValue);
 
 
        bool changeItemByIndex(std::size_t index, const sf::String& newValue);
 
 
        std::size_t getItemCount() const;
 
 
        std::vector<sf::String> getItems() const;
 
 
        const std::vector<sf::String>& getItemIds() const;
 
 
        void setItemHeight(unsigned int itemHeight);
 
 
        unsigned int getItemHeight() const;
 
 
        void setTextSize(unsigned int textSize) override;
 
 
        void setMaximumItems(std::size_t maximumItems = 0);
 
 
        std::size_t getMaximumItems() const;
 
 
        void setAutoScroll(bool autoScroll);
 
 
        bool getAutoScroll() const;
 
 
        bool contains(const sf::String& item) const;
 
 
        bool containsId(const sf::String& id) const;
 
 
        void setScrollbarValue(unsigned int value);
 
 
        unsigned int getScrollbarValue() const;
 
 
        bool mouseOnWidget(Vector2f pos) const override;
 
        void leftMousePressed(Vector2f pos) override;
 
        void leftMouseReleased(Vector2f pos) override;
 
        void mouseMoved(Vector2f pos) override;
 
        bool mouseWheelScrolled(float delta, Vector2f pos) override;
 
        void mouseNoLongerOnWidget() override;
 
        void leftMouseButtonNoLongerDown() override;
 
 
        void draw(sf::RenderTarget& target, sf::RenderStates states) const override;
 
 
    protected:
 
        Signal& getSignal(std::string signalName) override;
 
 
        void rendererChanged(const std::string& property) override;
 
 
        std::unique_ptr<DataIO::Node> save(SavingRenderersMap& renderers) const override;
 
 
        void load(const std::unique_ptr<DataIO::Node>& node, const LoadingRenderersMap& renderers) override;
 
 
        // Returns the size without the borders
        Vector2f getInnerSize() const;
 
 
        // Update the colors and text style of the selected and hovered items
        void updateSelectedAndHoveringItemColorsAndStyle();
 
 
        // Update the color and text style of all the items
        void updateItemColorsAndStyle();
 
 
        // Update on which item the mouse is standing
        void updateHoveringItem(int item);
 
 
        // Update which item is selected
        void updateSelectedItem(int item);
 
 
        // This function is called every frame with the time passed since the last frame.
        bool update(sf::Time elapsedTime) override;
 
 
        // Makes a copy of the widget
        Widget::Ptr clone() const override
        {
            return std::make_shared<ListBox>(*this);
        }
 
 
    public:
 
        SignalItem onItemSelect   = {"ItemSelected"};   
        SignalItem onMousePress   = {"MousePressed"};   
        SignalItem onMouseRelease = {"MouseReleased"};  
        SignalItem onDoubleClick  = {"DoubleClicked"};  
 
 
    protected:
 
        // This contains the different items in the list box
        std::vector<Text>       m_items;
        std::vector<sf::String> m_itemIds;
 
        // What is the index of the selected item?
        // This is also used by combo box, so it can't just be changed to a pointer!
        int m_selectedItem = -1;
 
        int m_hoveringItem = -1;
 
        // The size must be stored
        unsigned int m_itemHeight = 0;
        unsigned int m_requestedTextSize = 0;
 
        // This will store the maximum number of items in the list box (zero by default, meaning that there is no limit)
        std::size_t m_maxItems = 0;
 
        // When there are too many items a scrollbar will be shown
        CopiedSharedPtr<ScrollbarChildWidget> m_scroll;
 
        // Will be set to true after the first click, but gets reset to false when the second click does not occur soon after
        bool m_possibleDoubleClick = false;
 
        bool m_autoScroll = true;
 
        Sprite m_spriteBackground;
 
        // Cached renderer properties
        Borders   m_bordersCached;
        Borders   m_paddingCached;
        Color     m_borderColorCached;
        Color     m_backgroundColorCached;
        Color     m_backgroundColorHoverCached;
        Color     m_selectedBackgroundColorCached;
        Color     m_selectedBackgroundColorHoverCached;
        Color     m_textColorCached;
        Color     m_textColorHoverCached;
        Color     m_selectedTextColorCached;
        Color     m_selectedTextColorHoverCached;
        TextStyle m_textStyleCached;
        TextStyle m_selectedTextStyleCached;
 
    };
 
}
 
 
#endif // TGUI_LIST_BOX_HPP