protected override void OnTextInput(TextCompositionEventArgs e)
{
base.OnTextInput(e);
if (e.Text.Length == 0)
{
return;
}
//取得字符输入[比对输入的字符，并触发与该字符相同的按钮]
char chKey = Char.ToUpper(e.Text[0]);
//循环按钮处理
foreach (UIElement child in (this.Content as Grid).Children)
{
RoundedButton btn = child as RoundedButton;
string strButton = (btn.Child as TextBlock).Text;
//检查按钮是否符合
if ((chKey == strButton[0]) && btn != btnDisplay && strButton != "Equals" && strButton != "Back" ||
(chKey == '=' && strButton == "Equals") ||
(chKey == '\r' && strButton == "Equals") ||
(chKey == '\b' && strButton == "Back") ||
(chKey == '\x1B' && btn == btnDisplay))
{
//模拟Click事件，以处理键盘
RoutedEventArgs argsClick = new RoutedEventArgs(RoundedButton.ClickEvent, btn);
btn.RaiseEvent(argsClick);
//让按钮看起来好像被按下
btn.IsPressed = true;
//设定计时器，以取消按下
DispatcherTimer tmr = new DispatcherTimer();
tmr.Interval = TimeSpan.FromMilliseconds(100);
tmr.Tag = btn;
tmr.Tick += Tmr_Tick;
tmr.Start();
e.Handled = true;
}
}
}
void Init()
{
this.Title = "Calculate in Hex";
this.SizeToContent = SizeToContent.WidthAndHeight;
this.ResizeMode = ResizeMode.CanMinimize;
//建立一个Grid作为窗口的内容
Grid grid = new Grid();
grid.Margin = new Thickness(4);
this.Content = grid;
//建立5个列
for (int i = 0; i < 5; i++)
{
ColumnDefinition col = new ColumnDefinition();
col.Width = GridLength.Auto;
grid.ColumnDefinitions.Add(col);
}
//建立7个行
for (int i = 0; i < 7; i++)
{
RowDefinition row = new RowDefinition();
row.Height = GridLength.Auto;
grid.RowDefinitions.Add(row);
}
//按钮上面的文字
string[] strButtons = { "0",
"D","E", "F", "+", "&",
"A","B", "C", "-", "|",
"7","8", "9", "*", "^",
"4","5", "6", "/", "<<",
"1","2", "3", "%", ">>",
"0","Back", "Equals" };
int iRow = 0, iCol = 0;
//建立按钮
foreach (string str in strButtons)
{
//建立圆角按钮
RoundedButton btn = new RoundedButton();
btn.Focusable = false;
btn.Height = 32;
btn.Margin = new Thickness(4);
btn.Click += Btn_Click;
//为RoundedButton的孩子，建立TextBlock
TextBlock txt = new TextBlock();
txt.Text = str;
btn.Child = txt;
//在Grid内加入RountedButton
grid.Children.Add(btn);
Grid.SetRow(btn, iRow);
Grid.SetColumn(btn, iCol);
//Display按钮的做法例外
if (iRow == 0 && iCol == 0)
{
btnDisplay = btn;
btn.Margin = new Thickness(4, 4, 4, 6);
Grid.SetColumnSpan(btn, 5);
iRow = 1;
}
//Back和Equal
else if (iRow == 6 && iCol > 0)
{
Grid.SetColumnSpan(btn, 2);
iCol += 2;
}
//所有其他的按钮
else
{
btn.Width = 32;
if (0 == (iCol = (iCol + 1) % 5))
{
iRow++;
}
}
}
}
//Click事件处理器
private void Btn_Click(object sender, RoutedEventArgs e)
{
//取得点击的按钮
RoundedButton btn = e.Source as RoundedButton;
if (btn == null)
{
return;
}
//取得按钮文字和第一个字符
string strButton = (btn.Child as TextBlock).Text;
char chButton = strButton[0];
//一些特例
if (strButton == "Equals")
{
chButton = '=';
}
if (btn == btnDisplay)
{
numDisplay = 0;
}
else if (strButton == "Back")
{
numDisplay /= 16; //删除最后一位
}
//16进制数字
else if (Char.IsLetterOrDigit(chButton)) //字母或数字
{
if (bNewNumber)
{
numFirst = numDisplay;
numDisplay = 0;
bNewNumber = false;
}
if (numDisplay <= ulong.MaxValue >> 4)
{
numDisplay = 16 * numDisplay + (ulong)(chButton - (Char.IsDigit(chButton) ? '0' : 'A' - 10)); //将数字转成16进制的数
}
}
//操作[加、减、乘、除。。。]
else
{
if (!bNewNumber)
{
switch (chOperation)
{
case '=': break;
case '+': numDisplay = numFirst + numDisplay; break;
case '-': numDisplay = numFirst - numDisplay; break;
case '*': numDisplay = numFirst * numDisplay; break;
case '&': numDisplay = numFirst & numDisplay; break;
case '|': numDisplay = numFirst | numDisplay; break;
case '^': numDisplay = numFirst ^ numDisplay; break;
case '<': numDisplay = numFirst << (int)numDisplay; break;
case '>': numDisplay = numFirst >> (int)numDisplay; break;
case '/': numDisplay = numDisplay != 0 ? numFirst / numDisplay : ulong.MaxValue; break;
case '%': numDisplay = numDisplay != 0 ? numFirst % numDisplay : ulong.MaxValue; break;
default: numDisplay = 0; break;
}
}
bNewNumber = true;
chOperation = chButton;
}
//格式化
TextBlock text = new TextBlock();
text.Text = string.Format("{0:X}", numDisplay); //显示16进制的数字
btnDisplay.Child = text;
}
