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/*
* CTextInput.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#pragma once
#include "../gui/CIntObject.h"
#include "../gui/TextAlignment.h"
#include "../render/EFont.h"
#include "../../lib/filesystem/ResourcePath.h"
#include "../../lib/FunctionList.h"
class CLabel;
class IImage;
/// UIElement which can get input focus
class CFocusable : public CIntObject
{
friend void removeFocusFromActiveInput();
static std::atomic<int> usageIndex;
static std::list<CFocusable *> focusables; //all existing objs
static CFocusable * inputWithFocus; //who has focus now
void focusGot();
void focusLost();
virtual void onFocusGot() = 0;
virtual void onFocusLost() = 0;
public:
void giveFocus(); //captures focus
void moveFocus(); //moves focus to next active control (may be used for tab switching)
void removeFocus(); //remove focus
bool hasFocus() const;
CFocusable();
~CFocusable();
};
/// Text input box where players can enter text
class CTextInput final : public CFocusable
{
using TextEditedCallback = std::function<void(const std::string &)>;
using TextFilterCallback = std::function<void(std::string &, const std::string &)>;
std::string currentText;
std::string composedText;
ETextAlignment originalAlignment;
std::shared_ptr<CPicture> background;
std::shared_ptr<CLabel> label;
TextEditedCallback onTextEdited;
TextFilterCallback onTextFiltering;
CFunctionList<void()> callbackPopup;
//Filter that will block all characters not allowed in filenames
static void filenameFilter(std::string & text, const std::string & oldText);
//Filter that will allow only input of numbers in range min-max (min-max are allowed)
//min-max should be set via something like std::bind
static void numberFilter(std::string & text, const std::string & oldText, int minValue, int maxValue);
std::string getVisibleText() const;
void createLabel(bool giveFocusToInput);
void updateLabel();
void clickPressed(const Point & cursorPosition) final;
void textInputted(const std::string & enteredText) final;
void textEdited(const std::string & enteredText) final;
void onFocusGot() final;
void onFocusLost() final;
void showPopupWindow(const Point & cursorPosition) final;
CTextInput(const Rect & Pos);
public:
CTextInput(const Rect & Pos, EFonts font, ETextAlignment alignment, bool giveFocusToInput);
CTextInput(const Rect & Pos, const Point & bgOffset, const ImagePath & bgName);
CTextInput(const Rect & Pos, std::shared_ptr<IImage> srf);
/// Returns currently entered text. May not match visible text
const std::string & getText() const;
void setText(const std::string & nText);
/// Set callback that will be called whenever player enters new text
void setCallback(const TextEditedCallback & cb);
/// Set callback when player want to open popup
void setPopupCallback(const std::function<void()> & cb);
/// Enables filtering entered text that ensures that text is valid filename (existing or not)
void setFilterFilename();
/// Enable filtering entered text that ensures that text is valid number in provided range [min, max]
void setFilterNumber(int minValue, int maxValue);
void setFont(EFonts Font);
void setColor(const ColorRGBA & Color);
void setAlignment(ETextAlignment alignment);
// CIntObject interface impl
void keyPressed(EShortcut key) final;
void activate() final;
void deactivate() final;
};
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