#include "widget.h"
#include "ui_widget.h"
#include <QMessageBox>
#include <QPalette>
#include "cmath"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    ui->per->setReadOnly(true);
    ui->sqr->setReadOnly(true);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_pushButton_clicked()
{

    bool ok1, ok2, ok3, ok4, ok5, ok6;
    QString op1 = ui->x1->text();
    double x1 = op1.toDouble(&ok1);
    QString op2 = ui->x2->text();
    double x2 = op2.toDouble(&ok2);
    QString op3 = ui->x3->text();
    double x3 = op3.toDouble(&ok3);
    QString op4 = ui->y1->text();
    double y1 = op4.toDouble(&ok4);
    QString op5 = ui->y2->text();
    double y2 = op5.toDouble(&ok5);
    QString op6 = ui->y3->text();
    double y3 = op6.toDouble(&ok6);


    ui->per->setText("");
    ui->sqr->setText("");


    QPalette *palette = new QPalette();
    palette->setColor(QPalette::Base,Qt::white);
    ui->x1->setPalette(*palette);
    ui->x2->setPalette(*palette);
    ui->x3->setPalette(*palette);
    ui->y1->setPalette(*palette);
    ui->y2->setPalette(*palette);
    ui->y3->setPalette(*palette);

    if (ok1 && ok2 && ok3 && ok4 && ok5 && ok6){

        double l1 = sqrt(((x1-x2)*(x1-x2))+((y1-y2)*(y1-y2)));
        double l2 = sqrt(((x2-x3)*(x2-x3))+((y2-y3)*(y2-y3)));
        double l3 = sqrt(((x3-x1)*(x3-x1))+((y3-y1)*(y3-y1)));
        double perimetre = l1+l2+l3;
        QString perim = QString::number(perimetre);
        ui->per->setText(perim);

        double square = (abs(((x1-x3)*(y2-y3))-((x2-x3)*(y1-y3))))/2;
        QString squar = QString::number(square);
        ui->sqr->setText(squar);


    } else {
        QMessageBox::critical(this,"Ошибка","Некорректно введена(-ы) координата(-ы)");
        if (!ok1){
            QPalette *palette = new QPalette();
            palette->setColor(QPalette::Base,Qt::red);
            ui->x1->setPalette(*palette);
        }
        if (!ok2){
            QPalette *palette = new QPalette();
            palette->setColor(QPalette::Base,Qt::red);
            ui->x2->setPalette(*palette);
        }
        if (!ok3){
            QPalette *palette = new QPalette();
            palette->setColor(QPalette::Base,Qt::red);
            ui->x3->setPalette(*palette);
        }
        if (!ok4){
            QPalette *palette = new QPalette();
            palette->setColor(QPalette::Base,Qt::red);
            ui->y1->setPalette(*palette);
        }
        if (!ok5){
            QPalette *palette = new QPalette();
            palette->setColor(QPalette::Base,Qt::red);
            ui->y2->setPalette(*palette);
        }
        if (!ok6){
            QPalette *palette = new QPalette();
            palette->setColor(QPalette::Base,Qt::red);
            ui->y3->setPalette(*palette);
        }
    }




}