ComboBox.hpp

 
//
// TGUI - Texus' Graphical User Interface
// Copyright (C) 2012-2022 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_COMBO_BOX_HPP
#define TGUI_COMBO_BOX_HPP
 
 
#include <TGUI/Widgets/ListBox.hpp>
#include <TGUI/Renderers/ComboBoxRenderer.hpp>
 
 
namespace tgui
{
    class TGUI_API ComboBox : public Widget
    {
    public:
 
        enum class ExpandDirection
        {
            Down, 
            Up,   
            Automatic  
        };
 
    public:
 
        typedef std::shared_ptr<ComboBox> Ptr; 
        typedef std::shared_ptr<const ComboBox> ConstPtr; 
 
 
        ComboBox(const char* typeName = "ComboBox", bool initRenderer = true);
 
 
        // Copy constructor
        ComboBox(const ComboBox& other);
 
        // Move constructor
        ComboBox(ComboBox&& other);
 
        // Copy assignment operator
        ComboBox& operator= (const ComboBox& other);
 
        // Move assignment operator
        ComboBox& operator= (ComboBox&& other);
 
 
        static ComboBox::Ptr create();
 
 
        static ComboBox::Ptr copy(ComboBox::ConstPtr comboBox);
 
 
        ComboBoxRenderer* getSharedRenderer();
        const ComboBoxRenderer* getSharedRenderer() const;
 
        ComboBoxRenderer* getRenderer();
        const ComboBoxRenderer* getRenderer() const;
 
 
        void setSize(const Layout2d& size) override;
        using Widget::setSize;
 
 
        void setEnabled(bool enabled) override;
 
 
        void setItemsToDisplay(std::size_t nrOfItemsInListToDisplay);
 
 
        std::size_t getItemsToDisplay() const;
 
 
        std::size_t addItem(const String& itemName, const String& id = "");
 
 
        bool setSelectedItem(const String& itemName);
 
 
        bool setSelectedItemById(const String& id);
 
 
        bool setSelectedItemByIndex(std::size_t index);
 
 
        void deselectItem();
 
 
        bool removeItem(const String& itemName);
 
 
        bool removeItemById(const String& id);
 
 
        bool removeItemByIndex(std::size_t index);
 
 
        void removeAllItems();
 
 
        String getItemById(const String& id) const;
 
 
        String getSelectedItem() const;
 
 
        String getSelectedItemId() const;
 
 
        int getSelectedItemIndex() const;
 
 
        bool changeItem(const String& originalValue, const String& newValue);
 
 
        bool changeItemById(const String& id, const String& newValue);
 
 
        bool changeItemByIndex(std::size_t index, const String& newValue);
 
 
        std::size_t getItemCount() const;
 
 
        std::vector<String> getItems() const;
 
 
        std::vector<String> getItemIds() const;
 
 
        void setMaximumItems(std::size_t maximumItems = 0);
 
 
        std::size_t getMaximumItems() const;
 
 
        void setTextSize(unsigned int textSize) override;
 
 
        unsigned int getTextSize() const override;
 
 
        void setDefaultText(const String& defaultText);
 
 
        const String& getDefaultText() const;
 
 
        void setExpandDirection(ExpandDirection direction);
 
 
        ExpandDirection getExpandDirection() const;
 
 
        bool contains(const String& item) const;
 
 
        bool containsId(const String& id) const;
 
 
        void setChangeItemOnScroll(bool changeOnScroll);
 
 
        bool getChangeItemOnScroll() const;
 
 
        void setParent(Container* parent) override;
 
 
        bool isMouseOnWidget(Vector2f pos) const override;
 
        void leftMousePressed(Vector2f pos) override;
 
        bool mouseWheelScrolled(float delta, Vector2f pos) override;
 
 
        void draw(BackendRenderTargetBase& target, RenderStates states) const override;
 
 
    protected:
 
        Signal& getSignal(String signalName) override;
 
 
        void rendererChanged(const 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 height of the internal list box
        void updateListBoxHeight();
 
 
        // Shows the list of items.
        void showListBox();
 
 
        // Hides the list of items.
        void hideListBox();
 
 
        // Initialize the internal list box
        void initListBox();
 
 
        // Makes a copy of the widget
        Widget::Ptr clone() const override
        {
            return std::make_shared<ComboBox>(*this);
        }
 
 
    public:
 
        SignalItem onItemSelect = {"ItemSelected"}; 
 
 
    protected:
 
        // The number of items to display. If there is a scrollbar then you can scroll to see the other.
        // If there is no scrollbar then this will be the maximum amount of items.
        std::size_t m_nrOfItemsToDisplay = 0;
 
        // Internally a list box is used to store all items
        ListBox::Ptr m_listBox = ListBox::create();
 
        Text m_text;
        Text m_defaultText;
 
        int m_previousSelectedItemIndex = -1;
        bool m_changeItemOnScroll = false;
 
        ExpandDirection m_expandDirection = ExpandDirection::Automatic;
 
        Sprite m_spriteBackground;
        Sprite m_spriteBackgroundDisabled;
        Sprite m_spriteArrow;
        Sprite m_spriteArrowHover;
        Sprite m_spriteArrowDisabled;
 
        // Cached renderer properties
        Borders m_bordersCached;
        Padding m_paddingCached;
        Color   m_borderColorCached;
        Color   m_backgroundColorCached;
        Color   m_backgroundColorDisabledCached;
        Color   m_arrowColorCached;
        Color   m_arrowColorHoverCached;
        Color   m_arrowColorDisabledCached;
        Color   m_arrowBackgroundColorCached;
        Color   m_arrowBackgroundColorHoverCached;
        Color   m_arrowBackgroundColorDisabledCached;
        Color   m_textColorCached;
        Color   m_textColorDisabledCached;
 
    };
 
}
 
 
#endif // TGUI_COMBO_BOX_HPP