《WPF程序设计指南》读书笔记——第6章 Dock与Grid
1.DockPanel面板
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
namespace LY.DockAroundTheBlock
{
class DockAroundTheBlock:Window
{
[STAThread]
public static void Main()
{
new Application().Run(new DockAroundTheBlock());
}
public DockAroundTheBlock()
{
Title = "Dock Around The Block";
DockPanel dock = new DockPanel();
//LastChildFill属性默认值为true
//dock.LastChildFill = false;
Content = dock;
for (int i = 0; i < 17; i++)
{
Button btn = new Button();
btn.Content = "Button No. " + (i + 1);
dock.Children.Add(btn);
//将数值直接转换为枚举
//以下两种方法都可以
//btn.SetValue(DockPanel.DockProperty, (Dock)(i % 4));
DockPanel.SetDock(btn, (Dock)(i % 4));
}
}
}
}
2.Grid面板
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
namespace LY.CalculateYourLife
{
class CalculateYourLife : Window
{
TextBox txtboxBegin, txtboxEnd;
Label lblLifeYears;
[STAThread]
public static void Main()
{
Application app = new Application();
app.Run(new CalculateYourLife());
}
public CalculateYourLife()
{
Title = "Calculate Your Life";
SizeToContent = SizeToContent.WidthAndHeight;
ResizeMode = ResizeMode.CanMinimize;
Grid grid = new Grid();
Content = grid;
//显示Grid面板的网格线
grid.ShowGridLines = true;
// 行和列的定义
for (int i = 0; i < 3; i++)
{
//RowDefinitions是RowDefinition的集合
//用于定义网格的行
RowDefinition rowdef = new RowDefinition();
/*
* GridLength是结构体,可以用GridLength.Auto静态属性定义行的高度，如果
*用GridLength.Pixel(固定大小)或GridLength.Star(可用空间百分比)枚举
*也可以用new GridLength()构造函数，来指定固定大小或分配权重
*如果在new GridLength()构造函数中用GridLength.Auto枚举，则会忽略数值
*/
rowdef.Height = GridLength.Auto;//根据内容自动设定高度
//rowdef.Height = new GridLength(100, GridUnitType.Pixel);
//Grid会将所有GridUnitType.Star枚举值加起来得到总和，然后
//让每个值除以总和，以决定空间分配比
//rowdef.Height = new GridLength(20, GridUnitType.Star);
//如果用无参数构造函数，则默认为GridUnitType.Star,权重值为1
//rowdef.Height = new GridLength();
grid.RowDefinitions.Add(rowdef);
}
for (int i = 0; i < 2; i++)
{
ColumnDefinition coldef = new ColumnDefinition();
coldef.Width = GridLength.Auto;
grid.ColumnDefinitions.Add(coldef);
}
// First label.
Label lbl = new Label();
lbl.Content = "Begin Date: ";
grid.Children.Add(lbl);
//将控件放到Grid面板中
Grid.SetRow(lbl, 0);
Grid.SetColumn(lbl, 0);
// First TextBox.
txtboxBegin = new TextBox();
txtboxBegin.Text = new DateTime(1980, 1, 1).ToShortDateString();
txtboxBegin.TextChanged += TextBoxOnTextChanged;
grid.Children.Add(txtboxBegin);
Grid.SetRow(txtboxBegin, 0);
Grid.SetColumn(txtboxBegin, 1);
// Second label.
lbl = new Label();
lbl.Content = "End Date: ";
grid.Children.Add(lbl);
Grid.SetRow(lbl, 1);
Grid.SetColumn(lbl, 0);
// Second TextBox.
txtboxEnd = new TextBox();
txtboxEnd.TextChanged += TextBoxOnTextChanged;
grid.Children.Add(txtboxEnd);
Grid.SetRow(txtboxEnd, 1);
Grid.SetColumn(txtboxEnd, 1);
// Third label.
lbl = new Label();
lbl.Content = "Life Years: ";
grid.Children.Add(lbl);
Grid.SetRow(lbl, 2);
Grid.SetColumn(lbl, 0);
// Label for calculated result.
lblLifeYears = new Label();
grid.Children.Add(lblLifeYears);
Grid.SetRow(lblLifeYears, 2);
Grid.SetColumn(lblLifeYears, 1);
// Set margin for everybody.
Thickness thick = new Thickness(5);
grid.Margin = thick;
//遍历控件
foreach (Control ctrl in grid.Children)
ctrl.Margin = thick;
txtboxBegin.Focus();
txtboxEnd.Text = DateTime.Now.ToShortDateString();
}
void TextBoxOnTextChanged(object sender, TextChangedEventArgs args)
{
DateTime dtBeg, dtEnd;
if (DateTime.TryParse(txtboxBegin.Text, out dtBeg) &&
DateTime.TryParse(txtboxEnd.Text, out dtEnd))
{
int iYears = dtEnd.Year - dtBeg.Year;
int iMonths = dtEnd.Month - dtBeg.Month;
int iDays = dtEnd.Day - dtBeg.Day;
if (iDays < 0)
{
iDays += DateTime.DaysInMonth(dtEnd.Year,
1 + (dtEnd.Month + 10) % 12);
iMonths -= 1;
}
if (iMonths < 0)
{
iMonths += 12;
iYears -= 1;
}
lblLifeYears.Content =
String.Format("{0} year{1}, {2} month{3}, {4} day{5}",
iYears, iYears == 1 ? "" : "s",
iMonths, iMonths == 1 ? "" : "s",
iDays, iDays == 1 ? "" : "s");
}
else
{
lblLifeYears.Content = "";
}
}
}
}
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
namespace LY.EnterTheGrid
{
public class EnterTheGrid : Window
{
[STAThread]
public static void Main()
{
Application app = new Application();
app.Run(new EnterTheGrid());
}
public EnterTheGrid()
{
Title = "Enter the Grid";
MinWidth = 300;
SizeToContent = SizeToContent.WidthAndHeight;
//新建一个StackPanel
StackPanel stack = new StackPanel();
Content = stack;
//新建Grid面板，并且加入到StackPanel
Grid grid1 = new Grid();
grid1.Margin = new Thickness(5);
stack.Children.Add(grid1);
//设定行
for (int i = 0; i < 5; i++)
{
RowDefinition rowdef = new RowDefinition();
rowdef.Height = GridLength.Auto;
grid1.RowDefinitions.Add(rowdef);
}
//设定列
ColumnDefinition coldef = new ColumnDefinition();
coldef.Width = GridLength.Auto;
grid1.ColumnDefinitions.Add(coldef);
coldef = new ColumnDefinition();
//第二列会随着边框拉大而自动变大，因为其GridUnitType为Star
coldef.Width = new GridLength(100, GridUnitType.Star);
grid1.ColumnDefinitions.Add(coldef);
//创建labels控件
string[] strLabels = { "_First name:", "_Last name:",
"_Social security number:",
"_Credit card number:",
"_Other personal stuff:" };
for(int i = 0; i < strLabels.Length; i++)
{
Label lbl = new Label();
lbl.Content = strLabels[i];
lbl.VerticalContentAlignment = VerticalAlignment.Center;
grid1.Children.Add(lbl);
Grid.SetRow(lbl, i);
Grid.SetColumn(lbl, 0);
TextBox txtbox = new TextBox();
txtbox.Margin = new Thickness(5);
grid1.Children.Add(txtbox);
Grid.SetRow(txtbox, i);
Grid.SetColumn(txtbox, 1);
}
//再新建一个Grid面板，并且加入到StackPanel
Grid grid2 = new Grid();
grid2.Margin = new Thickness(10);
stack.Children.Add(grid2);
// 因为grid2只需要有一行，因此不用定义行
// 默认方式下是Star枚举，权重值为1
grid2.ColumnDefinitions.Add(new ColumnDefinition());
grid2.ColumnDefinitions.Add(new ColumnDefinition());
grid2.ColumnDefinitions.Add(new ColumnDefinition());
grid2.ShowGridLines = true;
//加入按钮
Button btn = new Button();
btn.Content = "Submit";
btn.HorizontalAlignment = HorizontalAlignment.Center;
btn.IsDefault = true;
btn.Click += delegate { Close(); };
grid2.Children.Add(btn); // 默认情况下行和列都是0
Grid.SetColumnSpan(btn, 2); // 跨两个列
btn = new Button();
btn.Content = "Cancel";
btn.HorizontalAlignment = HorizontalAlignment.Center;
btn.IsCancel = true;
btn.Click += delegate { Close(); };
grid2.Children.Add(btn);
Grid.SetColumn(btn, 2); //默认行是0.
//设定激活控件
(stack.Children[0] as Panel).Children[1].Focus();
}
}
}
3.GridSplitter控件（只能在Grid面板中使用）
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
namespace LY.SplitNine
{
class SplitNine:Window
{
[STAThread]
public static void Main()
{
new Application().Run(new SplitNine());
}
public SplitNine()
{
Title = "Split Nine";
Grid grid = new Grid();
grid.ShowGridLines = true;
Content = grid;
for (int i = 0; i < 3; i++)
{
grid.RowDefinitions.Add(new RowDefinition());
grid.ColumnDefinitions.Add(new ColumnDefinition());
}
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
Button btn = new Button();
btn.Content = "行" + j + "列" + i;
btn.Margin = new Thickness(5);
grid.Children.Add(btn);
//Grid类静态方法设定控件在Grid面板上位置
Grid.SetRow(btn, j);
Grid.SetColumn(btn, i);
}
}
GridSplitter split = new GridSplitter();
//是否同时显示拖动前的split控件位置
split.ShowsPreview = true;
//split默认在网格cell中靠右伸展
//水平分隔控件
split.HorizontalAlignment = HorizontalAlignment.Stretch;
split.VerticalAlignment = VerticalAlignment.Top;
//垂直分隔控件
//split.HorizontalAlignment = HorizontalAlignment.Center;
//split.VerticalAlignment = VerticalAlignment.Stretch;
//拖动split会影响到哪些行和列
split.ResizeBehavior = GridResizeBehavior.CurrentAndNext;
//拖动split会影响到行还是列
split.ResizeDirection = GridResizeDirection.Rows;
//split默认宽度和高度为0，所以必须设一个值
//注意：水平分隔时，不能只设width（Stretch属性设定了）不设Heigth
//注意：垂直分隔时，不能只设Heigth（Stretch属性设定了）不设width
//注意：否则分割线没有Heigth或width都会显示不出来
split.Width = 30;
split.Height = 20;
split.Background = Brushes.Red;
split.Margin = new Thickness(10);
grid.Children.Add(split);
Grid.SetRow(split, 1);
Grid.SetColumn(split, 1);
//Grid.SetRowSpan(split,3);
}
}
}
4.ScrollBar控件
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
class ColorScroll : Window
{
ScrollBar[] scrolls = new ScrollBar[3];
TextBlock[] txtValue = new TextBlock[3];
Panel pnlColor;
[STAThread]
public static void Main()
{
Application app = new Application();
app.Run(new ColorScroll());
}
public ColorScroll()
{
Title = "Color Scroll";
Width = 500;
Height = 300;
// GridMain contains a vertical splitter.
Grid gridMain = new Grid();
Content = gridMain;
// GridMain column definitions.
ColumnDefinition coldef = new ColumnDefinition();
coldef.Width = new GridLength(200, GridUnitType.Pixel);
gridMain.ColumnDefinitions.Add(coldef);
coldef = new ColumnDefinition();
coldef.Width = GridLength.Auto;
gridMain.ColumnDefinitions.Add(coldef);
coldef = new ColumnDefinition();
coldef.Width = new GridLength(100, GridUnitType.Star);
gridMain.ColumnDefinitions.Add(coldef);
// Vertical splitter.
GridSplitter split = new GridSplitter();
split.HorizontalAlignment = HorizontalAlignment.Center;
split.VerticalAlignment = VerticalAlignment.Stretch;
split.Width = 6;
gridMain.Children.Add(split);
Grid.SetRow(split, 0);
Grid.SetColumn(split, 1);
// Panel on right side of splitter to display color
pnlColor = new StackPanel();
pnlColor.Background = new SolidColorBrush(SystemColors.WindowColor);
gridMain.Children.Add(pnlColor);
Grid.SetRow(pnlColor, 0);
Grid.SetColumn(pnlColor, 2);
// Secondary grid at left of splitter
Grid grid = new Grid();
gridMain.Children.Add(grid);
Grid.SetRow(grid, 0);
Grid.SetColumn(grid, 0);
// Three rows for label, scroll, and label.
RowDefinition rowdef = new RowDefinition();
rowdef.Height = GridLength.Auto;
grid.RowDefinitions.Add(rowdef);
rowdef = new RowDefinition();
rowdef.Height = new GridLength(100, GridUnitType.Star);
grid.RowDefinitions.Add(rowdef);
rowdef = new RowDefinition();
rowdef.Height = GridLength.Auto;
grid.RowDefinitions.Add(rowdef);
// Three columns for Red, Green, and Blue.
for (int i = 0; i < 3; i++)
{
coldef = new ColumnDefinition();
coldef.Width = new GridLength(33, GridUnitType.Star);
grid.ColumnDefinitions.Add(coldef);
}
for (int i = 0; i < 3; i++)
{
Label lbl = new Label();
lbl.Content = new string[] { "Red", "Green", "Blue" }[i];
lbl.HorizontalAlignment = HorizontalAlignment.Center;
grid.Children.Add(lbl);
Grid.SetRow(lbl, 0);
Grid.SetColumn(lbl, i);
scrolls[i] = new ScrollBar();
scrolls[i].Focusable = true;
scrolls[i].Orientation = Orientation.Vertical;
scrolls[i].Minimum = 0;
scrolls[i].Maximum = 255;
scrolls[i].SmallChange = 1;
scrolls[i].LargeChange = 16;
scrolls[i].ValueChanged += ScrollOnValueChanged;
grid.Children.Add(scrolls[i]);
Grid.SetRow(scrolls[i], 1);
Grid.SetColumn(scrolls[i], i);
txtValue[i] = new TextBlock();
txtValue[i].TextAlignment = TextAlignment.Center;
txtValue[i].HorizontalAlignment = HorizontalAlignment.Center;
txtValue[i].Margin = new Thickness(5);
grid.Children.Add(txtValue[i]);
Grid.SetRow(txtValue[i], 2);
Grid.SetColumn(txtValue[i], i);
}
// Initialize scroll bars.
Color clr = (pnlColor.Background as SolidColorBrush).Color;
scrolls[0].Value = clr.R;
scrolls[1].Value = clr.G;
scrolls[2].Value = clr.B;
// Set initial focus.
scrolls[0].Focus();
}
void ScrollOnValueChanged(object sender, RoutedEventArgs args)
{
ScrollBar scroll = sender as ScrollBar;
Panel pnl = scroll.Parent as Panel;
TextBlock txt = pnl.Children[1 +
pnl.Children.IndexOf(scroll)] as TextBlock;
txt.Text = String.Format("{0}\n0x{0:X2}", (int)scroll.Value);
pnlColor.Background =
new SolidColorBrush(
Color.FromRgb((byte) scrolls[0].Value,
(byte) scrolls[1].Value,(byte) scrolls[2].Value));
}
}
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