EditBox.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_EDIT_BOX_HPP
#define TGUI_EDIT_BOX_HPP
 
 
#include <TGUI/Widgets/ClickableWidget.hpp>
#include <TGUI/Renderers/EditBoxRenderer.hpp>
#include <TGUI/Rect.hpp>
#include <TGUI/Text.hpp>
#include <regex>
 
 
namespace tgui
{
    class TGUI_API EditBox : public ClickableWidget
    {
    public:
 
        typedef std::shared_ptr<EditBox> Ptr; 
        typedef std::shared_ptr<const EditBox> ConstPtr; 
 
 
        enum class Alignment
        {
            Left,
 
            Center,
 
            Right
        };
 
 
        struct Validator
        {
            static TGUI_API const char* All;   
            static TGUI_API const char* Int;   
            static TGUI_API const char* UInt;  
            static TGUI_API const char* Float; 
        };
 
 
        EditBox(const char* typeName = "EditBox", bool initRenderer = true);
 
 
        static EditBox::Ptr create();
 
 
        static EditBox::Ptr copy(EditBox::ConstPtr editBox);
 
 
        EditBoxRenderer* getSharedRenderer();
        const EditBoxRenderer* getSharedRenderer() const;
 
        EditBoxRenderer* getRenderer();
        const EditBoxRenderer* getRenderer() const;
 
 
        void setSize(const Layout2d& size) override;
        using Widget::setSize;
 
 
        void setEnabled(bool enabled) override;
 
 
        void setText(const String& text);
 
 
        const String& getText() const;
 
 
        void setDefaultText(const String& text);
 
 
        const String& getDefaultText() const;
 
 
        void selectText(std::size_t start = 0, std::size_t length = String::npos);
 
 
        String getSelectedText() const;
 
 
        void setTextSize(unsigned int textSize) override;
 
 
        unsigned int getTextSize() const override;
 
 
        void setPasswordCharacter(char32_t passwordChar);
 
 
        char32_t getPasswordCharacter() const;
 
 
        void setMaximumCharacters(unsigned int maxChars);
 
 
        unsigned int getMaximumCharacters() const;
 
 
        void setAlignment(Alignment alignment);
 
 
        Alignment getAlignment() const;
 
 
        void limitTextWidth(bool limitWidth = true);
 
 
        bool isTextWidthLimited() const;
 
 
        void setReadOnly(bool readOnly = true);
 
 
        bool isReadOnly() const;
 
 
        void setCaretPosition(std::size_t charactersBeforeCaret);
 
 
        std::size_t getCaretPosition() const;
 
 
        bool setInputValidator(const String& regex = U".*");
 
 
        const String& getInputValidator() const;
 
 
        void setSuffix(const String& suffix);
 
 
        const String& getSuffix() const;
 
 
        void setFocused(bool focused) override;
 
 
        bool isMouseOnWidget(Vector2f pos) const override;
 
 
        void leftMousePressed(Vector2f pos) override;
 
        void mouseMoved(Vector2f pos) override;
 
        void keyPressed(const Event::KeyEvent& event) override;
 
        void textEntered(char32_t key) 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 total width that the text is going to take
        float getFullTextWidth() const;
 
 
        // Returns the size without the borders
        Vector2f getInnerSize() const;
 
 
        // Returns the width of the edit box minus the padding.
        float getVisibleEditBoxWidth() const;
 
 
        // This function will search after which character the caret should be placed. It will not change the caret position.
        std::size_t findCaretPosition(float posX);
 
 
        // Removes the selected characters. This function is called when pressing backspace, delete or a letter while there were
        // some characters selected.
        void deleteSelectedCharacters();
 
 
        // Recalculates the position of the texts.
        void recalculateTextPositions();
 
 
        // Updates the internal texts after SelStart or SelEnd changed.
        void updateSelection();
 
 
        // Update the color of the Text objects
        void updateTextColor();
 
 
        // Update auto-sized text
        void updateTextSize();
 
 
        // This function is called every frame with the time passed since the last frame.
        bool updateTime(Duration elapsedTime) override;
 
 
        // Makes a copy of the widget
        Widget::Ptr clone() const override
        {
            return std::make_shared<EditBox>(*this);
        }
 
 
    private:
 
        // Handles "Backspace" key press
        void backspaceKeyPressed();
 
        // Handles "Delete" key press
        void deleteKeyPressed();
 
        // Handles "Ctrl+C" key press (or equivalent on macOS)
        void copySelectedTextToClipboard();
 
        // Handles "Ctrl+X" key press (or equivalent on macOS)
        void cutSelectedTextToClipboard();
 
        // Handles "Ctrl+V" key press (or equivalent on macOS)
        void pasteTextFromClipboard();
 
        // Handles "ArrowLeft" key press
        void moveCaretLeft(bool shiftPressed);
 
        // Handles "ArrowRight" key press
        void moveCaretRight(bool shiftPressed);
 
        // Handles "Ctrl+ArrowLeft" key press (or equivalent on macOS)
        void moveCaretWordBegin();
 
        // Handles "Ctrl+ArrowRight" key press (or equivalent on macOS)
        void moveCaretWordEnd();
 
 
    public:
 
        SignalString onTextChange     = {"TextChanged"};        
        SignalString onReturnKeyPress = {"ReturnKeyPressed"};   
        SignalString onReturnOrUnfocus = {"ReturnOrUnfocused"}; 
 
 
    protected:
 
        // Is the caret visible or not?
        bool          m_caretVisible = true;
 
        // When this boolean is true then you can no longer add text when the EditBox is full.
        // Changing it to false will allow you to scroll the text (default).
        // You can change the boolean with the limitTextWidth(bool) function.
        bool          m_limitTextWidth = false;
 
        bool          m_readOnly = false;
 
        // The text inside the edit box
        String m_text;
        String m_displayedText; // Same as m_text unless a password char is set
 
        String m_regexString = U".*";
        std::wregex m_regex = std::wregex{m_regexString.toWideString()};
 
        // The text alignment
        Alignment     m_textAlignment = Alignment::Left;
 
        // The selection
        std::size_t   m_selChars = 0;
        std::size_t   m_selStart = 0;
        std::size_t   m_selEnd = 0;
 
        // The password character
        char32_t      m_passwordChar = '\0';
 
        // The maximum allowed characters.
        // Zero by default, meaning no limit.
        unsigned int  m_maxChars = 0;
 
        // When the text width is not limited, you can scroll the edit box and only a part will be visible.
        unsigned int  m_textCropPosition = 0;
 
        // The rectangle behind the selected text
        FloatRect     m_selectedTextBackground;
 
        // The blinking caret
        FloatRect     m_caret = {0, 0, 1, 0};
 
        // Is there a possibility that the user is going to double click?
        bool m_possibleDoubleClick = false;
 
        // We need three texts for drawing + one for the default text + one more for calculations.
        Text m_textBeforeSelection;
        Text m_textSelection;
        Text m_textAfterSelection;
        Text m_defaultText;
        Text m_textFull;
        Text m_textSuffix;
 
        Sprite m_sprite;
        Sprite m_spriteHover;
        Sprite m_spriteDisabled;
        Sprite m_spriteFocused;
 
        // Cached renderer properties
        Borders m_bordersCached;
        Padding m_paddingCached;
        Color   m_borderColorCached;
        Color   m_borderColorHoverCached;
        Color   m_borderColorDisabledCached;
        Color   m_borderColorFocusedCached;
        Color   m_backgroundColorCached;
        Color   m_backgroundColorHoverCached;
        Color   m_backgroundColorDisabledCached;
        Color   m_backgroundColorFocusedCached;
        Color   m_caretColorCached;
        Color   m_caretColorHoverCached;
        Color   m_caretColorFocusedCached;
        Color   m_selectedTextBackgroundColorCached;
 
 
    };
 
}
 
 
#endif // TGUI_EDIT_BOX_HPP