src/ui/edit_box.cpp - main - Mr.Stalin/FreeFT

src/ui/edit_box.cpp
103 строки3 KB
Krzysztof Jakubowski
Updated libfwk to latest version (2025.01) PART 1 (#9)
08 янв 2025, 23:03
08 янв 2025, 23:037639343
// Copyright (C) Krzysztof Jakubowski <nadult@fastmail.fm>
// This file is part of FreeFT. See license.txt for details.

#include "edit_box.h"

namespace ui {

EditBox::EditBox(const IRect &rect, int max_size, Str label, FColor col)
	: Window(rect, col), m_is_editing(false), m_cursor_pos(0), m_max_size(max_size),
	  m_label(toUTF32Checked(label)), m_font(res::getFont(WindowStyle::fonts[0])) {}

void EditBox::setText(string32 new_text) {
	m_text = std::move(new_text);
	if((int)m_text.size() > m_max_size)
		m_text.resize(m_max_size);
}

void EditBox::drawContents(Canvas2D &out) const {
	int line_height = m_font.lineHeight();

	int2 pos(5, height() / 2 - line_height / 2);
	m_font.draw(out, (float2)pos, {ColorId::white, ColorId::black}, m_label + m_text);

	if(m_is_editing) {
		IRect ext = m_font.evalExtents((m_label + m_text.substr(0, m_cursor_pos)).c_str());
		out.addSegment(pos + int2(ext.ex(), 0), pos + int2(ext.ex(), line_height),
					   FColor(ColorId::white, 0.7f));
		out.addRect(IRect(2, 1, width() - 1, height() - 2), FColor(ColorId::white, 0.3f));
	}
}

void EditBox::setCursorPos(int2 rect_pos) {
	m_cursor_pos = (int)m_text.size();

	//TODO: speed up
	for(int n = 0; n < (int)m_text.size(); n++) {
		auto text = m_label + m_text.substr(0, n);
		IRect ext = m_font.evalExtents(text.c_str());
		if(ext.ex() + 8 > rect_pos.x) {
			m_cursor_pos = max(0, n);
			break;
		}
	}
}

void EditBox::reset(bool is_editing) {
	m_cursor_pos = 0;
	setFocus((m_is_editing = is_editing));
	m_old_text = m_text = string32();
}

void EditBox::onInput(const InputState &state) {
	auto mouse_pos = state.mousePos() - clippedRect().min();

	if(!m_is_editing) {
		if(state.isMouseButtonDown(InputButton::left)) {
			setCursorPos(mouse_pos);
			setFocus((m_is_editing = true));
			m_old_text = m_text;
		}
	} else {
		if(!state.text().empty()) {
			m_text.insert(m_cursor_pos, state.text());
			m_cursor_pos += (int)state.text().size();
		} else {
			if(state.isKeyDownAuto(InputKey::right) && m_cursor_pos < (int)m_text.size())
				m_cursor_pos++;
			else if(state.isKeyDownAuto(InputKey::left) && m_cursor_pos > 0)
				m_cursor_pos--;
			else if(state.isKeyDownAuto(InputKey::del) && (int)m_text.size() > m_cursor_pos) {
				printf("erase\n");
				m_text.erase(m_cursor_pos, 1);
			} else if(state.isKeyDownAuto(InputKey::backspace) && m_cursor_pos > 0 &&
					  !m_text.empty()) {
				printf("erase\n");
				m_text.erase(--m_cursor_pos, 1);
			}
		}

		bool end = state.isKeyDown(InputKey::enter);
		if(state.isMouseButtonDown(InputButton::left) || end) {
			if(!end && rect().containsCell(mouse_pos)) {
				setCursorPos(mouse_pos);
			} else {
				setFocus((m_is_editing = false));
				if(m_old_text != m_text)
					sendEvent(this, Event::text_modified);
			}
		}
	}
}

bool EditBox::onEvent(const Event &event) {
	if(event.type == Event::escape && m_is_editing) {
		setFocus((m_is_editing = false));
		m_text = m_old_text;
		return true;
	}

	return false;
}

}