透明桌面日历的制作

[愚翁专栏]中有一个 如何用C#做一个类似于桌面插件的程序 的例子，拿来实际演练了一下，发现只是实现一个界面而已，只有没有日历的内容。但是这勾起了我的兴趣，决定自己做一个。

在http://www.codeproject.com/cs/miscctrl/MonthCalendar.asp上有一个MonthCalendar控件，既有源代码又有demo，我发扬了鲁迅先生的拿来主义，统统接收。对于这个控件功能还是比较丰富的，暂时没有深入发掘，只是用其实现了简单的桌面日历。

做的很简单，效果如图：



日历下面是瑞星，瑞星下面是MM。




下面写一下过程吧。

建窗体，就像 “[愚翁专栏]中如何用C#做一个类似于桌面插件”一样，设置属性。

l 设置FormBorderStyle为None；
l 设置TopMost为false；
l 设置ShowInTaskbar为false；
l 为了能穿透桌面，要把BackColor设为White，在把TransparentKey设为White；

然后就是添加控件MonthCalendar，具体设置就不写了，为了达到透明的效果，设置与form差不多，其他就是美观了。
这样生成的程序在桌面上是不能移动的，为了能实现移动，花了些心思（刚刚学c#不久）。思路是这样的：当鼠标移动进入form的区域时，将光标设置为hand，在mousedown中取得位置，然后用户的操作就是拖动窗体了，一般鼠标是不放开的，所以在mouseup中设置了form的新位置，这就实现了窗体的移动。
中间遇到的问题是，我的控件fill了窗体，当鼠标进入form区域时，控件就捕获了鼠标，使你不能移动窗体。为了解决这个问题，找遍了csdn的帖子，发现有两中方法，一是使用capture，二是使用鼠标钩子。capture自己放的地方不合适，费了一些周折。鼠标钩子兄弟我笨阿，不懂。后来想了办法，变通了一下，在NotifyIcon的关联ContextMenuStrip中加了个按钮，用来标志是否要移动窗体。再后来，突然想到，当鼠标进入窗体时，让上面的控件enabled = false；对日历没有什么影响，实现也方便。再后来，又加入了一个时间（小时，分钟）的lable，为了刷新时间，加了一个timer。这就把用到的东西基本说完了，下面看代码。

1。 // monthCalendar1的属性还是比较重要的，决定了界面
//
this.monthCalendar1.ActiveMonth.Month = 5;
this.monthCalendar1.ActiveMonth.Year = 2006;
this.monthCalendar1.BorderColor = System.Drawing.Color.Transparent;
this.monthCalendar1.BorderStyle = System.Windows.Forms.ButtonBorderStyle.None;
this.monthCalendar1.Culture = new System.Globalization.CultureInfo("zh-CN");
this.monthCalendar1.Cursor = System.Windows.Forms.Cursors.Hand;
this.monthCalendar1.Dock = System.Windows.Forms.DockStyle.Fill;
this.monthCalendar1.Footer.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold);
this.monthCalendar1.Footer.Format = Pabo.Calendar.mcTodayFormat.Long;
this.monthCalendar1.Footer.TextColor = System.Drawing.Color.Red;
this.monthCalendar1.Header.BackColor = System.Drawing.Color.Transparent;
this.monthCalendar1.Header.Font = new System.Drawing.Font("华文新魏", 15.75F, ((System.Drawing.FontStyle)((System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Underline))), System.Drawing.GraphicsUnit.Point, ((byte)(134)));
this.monthCalendar1.Header.TextColor = System.Drawing.Color.Blue;
this.monthCalendar1.Header.YearSelectors = true;
this.monthCalendar1.ImageList = null;
this.monthCalendar1.Location = new System.Drawing.Point(0, 0);
this.monthCalendar1.MaxDate = new System.DateTime(2016, 5, 20, 17, 43, 14, 203);
this.monthCalendar1.MinDate = new System.DateTime(1996, 5, 20, 17, 43, 14, 203);
this.monthCalendar1.Month.BackgroundImage = null;
this.monthCalendar1.Month.BorderStyles.Normal = System.Windows.Forms.ButtonBorderStyle.Dotted;
this.monthCalendar1.Month.BorderStyles.Selected = System.Windows.Forms.ButtonBorderStyle.Outset;
this.monthCalendar1.Month.Colors.FocusDate = System.Drawing.Color.Black;
this.monthCalendar1.Month.Colors.FocusText = System.Drawing.Color.Black;
this.monthCalendar1.Month.Colors.SelectedDate = System.Drawing.Color.Black;
this.monthCalendar1.Month.Colors.SelectedText = System.Drawing.Color.Black;
this.monthCalendar1.Month.Colors.WeekendBackground = System.Drawing.Color.Transparent;
this.monthCalendar1.Month.Colors.WeekendDate = System.Drawing.Color.Red;
this.monthCalendar1.Month.DateFont = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);
this.monthCalendar1.Month.ShowMonthInDay = true;
this.monthCalendar1.Month.TextAlign = Pabo.Calendar.mcItemAlign.TopLeft;
this.monthCalendar1.Month.TextFont = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);
this.monthCalendar1.Name = "monthCalendar1";
this.monthCalendar1.ShowWeeknumbers = true;
this.monthCalendar1.Size = new System.Drawing.Size(449, 346);
this.monthCalendar1.TabIndex = 1;
this.monthCalendar1.Weekdays.BorderColor = System.Drawing.Color.Transparent;
this.monthCalendar1.Weekdays.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);
this.monthCalendar1.Weekdays.Format = Pabo.Calendar.mcDayFormat.Long;
this.monthCalendar1.Weekdays.TextColor = System.Drawing.Color.Fuchsia;
this.monthCalendar1.Weeknumbers.Align = Pabo.Calendar.mcWeeknumberAlign.Center;
this.monthCalendar1.Weeknumbers.BorderColor = System.Drawing.Color.Transparent;
this.monthCalendar1.Weeknumbers.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);
this.monthCalendar1.Weeknumbers.TextColor = System.Drawing.Color.Lime;
this.monthCalendar1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.monthCalendar1_MouseMove);
this.monthCalendar1.MouseEnter += new System.EventHandler(this.monthCalendar1_MouseEnter);
this.monthCalendar1.HeaderMouseEnter += new System.EventHandler(this.monthCalendar1_HeaderMouseEnter);
this.monthCalendar1.FooterMouseEnter += new System.EventHandler(this.monthCalendar1_FooterMouseEnter);
2。

//记录位置的
private Rectangle canmoveRect = new Rectangle();
private bool canMove = false ;
private int form1Left;
private int form1Top;
private int mouseLeft;
private int mouseTop;

//点击move
private void moveToolStripMenuItem_Click(object sender, EventArgs e)
{
if (moveToolStripMenuItem.Checked == true)
{
moveToolStripMenuItem.Checked = false;
this.TopMost = false;
canMove = false;
this.monthCalendar1.Enabled = true ;
}
else
{
moveToolStripMenuItem.Checked = true;
this.TopMost = true;
canMove = true;
canmoveRect = new Rectangle(this.Location.X, this.Location.Y, this.Width, this.Height);
this.monthCalendar1.Enabled = false;
}

}

//总要退出吧
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();

}

3。
//移动阿
private void HeliosDeskCalendar_MouseDown(object sender, MouseEventArgs e)
{
if (this.Cursor == Cursors.Hand && canMove)
{
form1Left = this.Left;
form1Top = this.Top;
mouseLeft = this.Left + e.X;
mouseTop = this.Top + e.Y;
}
}
private void HeliosDeskCalendar_MouseMove(object sender, MouseEventArgs e)
{
if (canmoveRect.Contains(e.X, e.Y) && canMove)
{
this.Cursor = Cursors.Hand;
}
}
private void HeliosDeskCalendar_MouseUp(object sender, MouseEventArgs e)
{
if (this.Cursor == Cursors.Hand && canMove)
{
this.Left = form1Left + (this.Left + e.X) - mouseLeft;
this.Top = form1Top + (this.Top + e.Y) - mouseTop;
}
}

4。
//最后加的lable要显示时间，总不能enabled = false吧

private void labelTime_MouseEnter(object sender, EventArgs e)
{
if (canMove)
{
this.Capture = true;
this.labelTime.Capture = false;
}
}
private void labelTime_MouseMove(object sender, MouseEventArgs e)
{
if (canMove)
{
this.Capture = true;
this.labelTime.Capture = false;
}
}
5。借助timer刷新时间
private void timer1_Tick(object sender, EventArgs e)
{
// labelTime.Text = System.DateTime.Now.ToString();
// labelTime.Text = System.DateTime.Now.ToShortTimeString();
labelTime.Text = System.DateTime.Now.ToLongTimeString();
}
6。
MonthCalendar可以利用的地方很多，可以用来丰富日历功能。如事件就有：

Events

The most useful events are:

Month

MonthChanged

: Indicates that the active month was changed.

DayDragDrop

: Indicates that data was dropped on a day,

AllowDrop

must be

true

for this event to be raised.

ImageClick

: Indicates that an image was clicked.

DayClick

: Indicates that a day was clicked.

DayRender

: Occurs before a date is updated.

DayDoubleClick

: Indicates that a day was double clicked.

DaySelected

: Indicates that one or more days were selected.

DayDeselected

: Indicates that one or more days were deselected.

DayGotFocus

: Indicates that a day received focus.

DayLostFocus

: Indicates that a day lost focus.

DayMouseMove

: Indicates that the mouse is moved inside a day.

Header

HeaderClick

: Indicates that the header was clicked.

HeaderDoubleClick

: Indicates that the header was double clicked.

HeaderMouseEnter

: Indicates that the mouse entered the header region.

HeaderMouseLeave

: Indicates that the mouse left the header region.

Footer

FooterClick

: Indicates that the footer was clicked.

FooterDoubleClick

: Indicates that the footer was double clicked.

FooterMouseEnter

: Indicates that the mouse entered the footer region.

FooterMouseLeave

: Indicates that the mouse left the footer region.

Weekday

WeekdayClick

: Indicates that a weekday was clicked.

WeekdayDoubleClick

: Indicates that a weekday was double clicked.

WeekdayMouseEnter

: Indicates that the mouse entered the weekday region.

WeekdayMouseLeave

: Indicates that the mouse left the weekday region.

Weeknumber

WeeknumberClick

: Indicates that a week was clicked.

WeeknumberDoubleClick

: Indicates that a week was double clicked.

WeeknumberMouseEnter

: Indicates that the mouse entered the week number region.

WeeknumberMouseLeave

: Indicates that the mouse left the week number region.

7。含控件的透明窗体移动与鼠标的捕获是重点，日历的功能就要再发掘MonthCalendar控件或者自己改造了，好在有源码。另外，也可以按照[愚翁]先生的方法，直接按照一定的算法在form上显示也是一种选择。