qt-course/exer54-invert-numbers/MyWidget.cpp

   1 #include <QString>
   2 #include <QQueue>
   3 #include <QStack>
   4
   5 #include "MyWidget.h"
   6
   7 MyWidget::MyWidget(QWidget *parent)
   8 : QWidget(parent)
   9 {
  10         m_ui = new Ui::MyWidgetBase();
  11         m_ui->setupUi(this);
  12
  13         m_numbers = new QQueue<int>;
  14
  15         connect(m_ui->m_addButton, SIGNAL(clicked(bool)), this,
  16                         SLOT(slot_addButtonClicked()));
  17
  18         connect(m_ui->m_invButton, SIGNAL(clicked(bool)), this,
  19                         SLOT(slot_invButtonClicked()));
  20
  21         connect(m_ui->m_clrButton, SIGNAL(clicked(bool)), this,
  22                         SLOT(slot_clrButtonClicked()));
  23 }
  24
  25 MyWidget::~MyWidget()
  26 {
  27         delete m_numbers;
  28 }
  29
  30 void MyWidget::slot_addButtonClicked()
  31 {
  32         QString num = m_ui->m_lineEdit->text();
  33         if (num == "")
  34                 return;
  35
  36         m_numbers->append(num.toInt());
  37
  38         QString text = m_ui->m_label->text();
  39         text += num + "  ";
  40         m_ui->m_label->setText(text);
  41         m_ui->m_lineEdit->setText("");
  42 }
  43
  44 void MyWidget::slot_invButtonClicked()
  45 {
  46         QStack<int> m_stack;
  47
  48         if (m_numbers->isEmpty())
  49                 return;
  50
  51         int count = m_numbers->count();
  52         for (int i = 0; i < count; i++)
  53                 m_stack.push(m_numbers->dequeue());
  54
  55         QString text;
  56         for (int i = 0; i < count; i++)
  57                 text += QString::number(m_stack.pop(), 10) + "  ";
  58
  59         m_ui->m_label->setText(text);
  60 }
  61
  62 void MyWidget::slot_clrButtonClicked()
  63 {
  64         m_ui->m_label->setText("");
  65         m_ui->m_lineEdit->setText("");
  66         m_numbers->clear();
  67 }