view.cpp

#include <QFile>
#include <QTextStream>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QGraphicsOpacityEffect>
#include <QPropertyAnimation>
#include <QCompleter>
#include <QDebug>

#include <iostream>
#include <cassert>

#include "view.hpp"

View::View() {
    cities = new QStringListModel();

    search = new QLineEdit();
    search->setCompleter([this]() {
            QCompleter* completer = new QCompleter(cities);
            completer->setCaseSensitivity(Qt::CaseInsensitive);
            return completer;
        }());

    connect(search, SIGNAL(textEdited(const QString&)),
            this, SLOT(text_handler(const QString&)));

    go = new QPushButton(tr("Поиск"));
    connect(go, SIGNAL(clicked()), this, SLOT(go_handler()));

    // the next code is all about initializing stack of widgets
    QFile file(":resources/no_data.html");
    assert(file.open(QIODevice::ReadOnly | QIODevice::Text));

    no_data = new QWebView();
    no_data->setHtml(QTextStream(&file).readAll());
    no_data->setGraphicsEffect([]() {
            QGraphicsOpacityEffect* effect = new QGraphicsOpacityEffect();
            effect->setOpacity(1.0);
            return effect;
        }());

    weather = new QWebView();
    weather->setGraphicsEffect([]() {
            QGraphicsOpacityEffect* effect = new QGraphicsOpacityEffect();
            effect->setOpacity(1.0);
            return effect;
        }());

    info = new QStackedWidget();
    info->addWidget(no_data);
    info->addWidget(weather);
    info->setCurrentIndex(0);

    place_it();
}

View* View::satisfy_weather(const QString& data) {
    //show weather
    weather->setHtml(data);
    info->setCurrentWidget(weather);
    //slighty animated
    animate_it(weather);

    return this;
}

View* View::satisfy_cities(const QStringList& data) {
    cities->setStringList(data);
    search->completer()->complete();

    return this;
}

View* View::damn() {
    //show damn
    info->setCurrentWidget(no_data);
    //slighty animated
    animate_it(no_data);

    return this;
}

void View::place_it() {
    QHBoxLayout* horizontal = new QHBoxLayout();
    horizontal->addWidget(search);
    horizontal->addWidget(go);

    QVBoxLayout* vertical = new QVBoxLayout();
    vertical->addLayout(horizontal);
    vertical->addWidget(info);

    QWidget* content = new QWidget();
    content->setLayout(vertical);

    setCentralWidget(content);
    resize(600, 200);
}

void View::animate_it(QWidget* widget) {
    QGraphicsOpacityEffect* effect = static_cast<QGraphicsOpacityEffect*>(widget->graphicsEffect());
    QPropertyAnimation* animation = new QPropertyAnimation(effect, "opacity");
    animation->setDuration(1000);
    animation->setStartValue(0.0);
    animation->setEndValue(1.0);
    animation->start(QAbstractAnimation::DeleteWhenStopped);
}

void View::go_handler() {
    if (search->text().trimmed().length() > 0)
        emit desire_weather(search->text().trimmed());
}

void View::text_handler(const QString& city) {
    if (city.trimmed().length() > 0)
        emit desire_cities(city.trimmed());
}