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

src/ui/combo_box.cpp
95 строк3 KB
Krzysztof Jakubowski
Formatted code to new style
25 фев 2024, 00:49
25 фев 2024, 00:49ad441de
// Copyright (C) Krzysztof Jakubowski <nadult@fastmail.fm>
// This file is part of FreeFT. See license.txt for details.

#include "ui/combo_box.h"

namespace ui {

ComboBox::ComboBox(const IRect &rect, int drop_size, const char *prefix, CSpan<const char *> values)
	: Window(rect), m_drop_size(drop_size), m_prefix(prefix) {
	m_button = make_shared<Button>(IRect(int2(0, 0), rect.size()), "");
	m_dummy = make_shared<ListBox>(IRect(0, 0, 10, 10));
	attach(m_button);

	for(auto value : values)
		addEntry(value, ColorId::white);
	if(!values.empty())
		selectEntry(0);
}

bool ComboBox::onEvent(const Event &ev) {
	if(ev.type == Event::window_closed && ev.source == m_popup.get()) {
		m_dummy->selectEntry(m_popup->selectedId());
		m_popup = nullptr;
		updateButton();

		if(ev.value)
			sendEvent(this, Event::element_selected, m_dummy->selectedId());
	} else if(ev.type == Event::button_clicked && ev.source == m_button.get()) {
		DASSERT(!m_popup);

		if(m_drop_size > 0 && size()) {
			int popup_size = min(m_drop_size, m_dummy->size() * m_dummy->lineHeight());
			IRect clip_rect = clippedRect();
			IRect rect(clip_rect.min(), int2(clip_rect.ex(), clip_rect.y() + popup_size));

			m_popup = make_shared<ListBox>(rect, WindowStyle::gui_popup);
			for(int n = 0; n < size(); n++) {
				const ListBox::Entry &entry = (*m_dummy)[n];
				m_popup->addEntry(entry.text.c_str(), entry.color);
			}
			m_popup->selectEntry(m_dummy->selectedId());
			m_popup->setInnerOffset(int2(0, m_dummy->selectedId() * m_dummy->lineHeight()));
			mainWindow()->attach(m_popup, true);
		} else if(size() > 1) {
			int next_id = (selectedId() + 1) % size();
			selectEntry(next_id);
			sendEvent(this, Event::element_selected, next_id);
		}
	} else
		return false;

	return true;
}

void ComboBox::addEntry(const char *text, Color col) {
	DASSERT(!m_popup);
	m_dummy->addEntry(text, col);
	updateButton();
}

int ComboBox::findEntry(const char *text) const { return m_dummy->findEntry(text); }

int ComboBox::selectedId() const { return (m_popup ? m_popup : m_dummy)->selectedId(); }

void ComboBox::selectEntry(int id) {
	(m_popup ? m_popup : m_dummy)->selectEntry(id);
	updateButton();
}

void ComboBox::clear() {
	DASSERT(!m_popup);
	m_dummy->clear();
	updateButton();
}

const ListBox::Entry &ComboBox::operator[](int idx) const { return m_dummy->operator[](idx); }

ListBox::Entry &ComboBox::operator[](int idx) {
	DASSERT(!m_popup);
	return m_dummy->operator[](idx);
}

int ComboBox::size() const { return m_dummy->size(); }

void ComboBox::updateButton() {
	int selected_id = m_dummy->selectedId();
	char buf[256];
	snprintf(buf, sizeof(buf), "%s%s", m_prefix.c_str(),
			 selected_id >= 0 && selected_id < m_dummy->size() ?
				 (*m_dummy)[selected_id].text.c_str() :
				 "");
	m_button->setText(buf);
}

}