infragistics是全球领先的UI工具和用户体验的专家,Infragistics开发了一系列的炫目的Windows、Web、WPF和Silverlight控件,相信很多人在使用它们。我们现在的项目就在使用Infragistics的Windows Form控件集。虽然这些控件功能强大,也不可能满足你所有的需求,尤其是那些比较苛刻的最终用户的需求。比如,我们最近就接收到这样一个变态的需求:让所以菜单项、工具栏按钮、网格单元的ToolTip以气球式的样式显示。最终,我不得不通过对现有控件的扩展实现这个要求。
一、扩展UltraGrid
首先介绍对UltraGrid的扩展,先来看看显示的效果:当鼠标移到到每一个单元格(或者列头)的时候,会出现如下一个气球式的ToolTip,其文字的内容为单元格中的文本。ToolTip的样式,包括背景、字体等均可以通过Infragistics控件本身支持的风格文件定义。
下面是扩展控件ExtendedUltraGrid的定义,逻辑比较简单:直接继承自UltraGrid,重写两个方法:OnMouseEnterElement和OnMouseLeaveElement。当鼠标移入和移出相应元素的时候,这两个方法会被调用。通过重写OnMouseEnterElement方法,手工创建UltraToolTipInfo对象,并通过UltraToolTipManager对象(UltraToolTipManager在对象构建的时候被初始化)以ToolTip的形式显示出来;手工创建的ToolTip在OnMouseLeaveElement被执行的时候被移除。此外,由于UltraGrid的单元格和列头本身具有自己的ToolTip,你需要通过DisplayLayout.Override.TipStyleCell和DisplayLayout.Override.TipStyleHeader这两个属性抑制它们的显示。
1: using Infragistics.Win;
2: using Infragistics.Win.UltraWinGrid;
3: using Infragistics.Win.UltraWinToolTip;
4:
5: namespace Artech.ExtendedControls4ToolTip
6: {
7:
8: public class ExtendedUltraGrid : UltraGrid {
9:
10: private UltraToolTipManager toolTipManager = new UltraToolTipManager();
11: protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe)
12: {
13: base.OnPaint(pe);
14: this.DisplayLayout.Override.TipStyleCell = TipStyle.Hide;
15: this.DisplayLayout.Override.TipStyleHeader = TipStyle.Hide;
16: }
17:
18: protected override void OnMouseEnterElement(UIElementEventArgs e)
19: {
20: UltraGridCell enteredCell = e.Element.GetContext(typeof(UltraGridCell)) as UltraGridCell;
21: if (enteredCell != null)
22: {
23: if (enteredCell.Column.DataType == typeof(bool))
24: {
25: return;
26: }
27:
28: UltraToolTipInfo gridToolTip = new UltraToolTipInfo(enteredCell.Text, ToolTipImage.Default, null, DefaultableBoolean.Default);
29: this.toolTipManager.SetUltraToolTip(this, gridToolTip);
30: this.toolTipManager.ShowToolTip(this);
31: return;
32: }
33:
34: ColumnHeader enteredHeader = e.Element.GetContext(typeof(ColumnHeader)) as ColumnHeader;
35: if (enteredHeader != null)
36: {
37: enteredHeader.ToolTipText = string.Empty;
38: UltraToolTipInfo gridToolTip = new UltraToolTipInfo(enteredHeader.Caption, ToolTipImage.Default, null, DefaultableBoolean.Default);
39: this.toolTipManager.SetUltraToolTip(this, gridToolTip);
40: this.toolTipManager.ShowToolTip(this);
41: }
42: }
43:
44: protected override void OnMouseLeaveElement(UIElementEventArgs e)
45: {
46: base.OnMouseLeaveElement(e);
47: UltraGridCell enteredCell = e.Element.GetContext(typeof(UltraGridCell)) as UltraGridCell;
48: ColumnHeader enteredHeader = e.Element.GetContext(typeof(ColumnHeader)) as ColumnHeader;
49: if (null != enteredCell || null != enteredHeader)
50: {
51: this.toolTipManager.HideToolTip();
52: }
53: }
54: }
55: }
二、扩展UltraListView
下面是扩展后的UltrlListView(在Detail模式)的ToolTip显示的样式,ExtendedUltraGrid差不多:当鼠标移到相应的ListViewItem上面,将相应的内容以气球式的ToolTip实现出来。
扩展后的ExtendedUltrlListView的实现与ExtendedUltraGrid基本上完全一样,通过是对OnMouseEnterElement和OnMouseLeaveElement这两个方法的重写来实现,为了抑制UltrlListView自身的ToolTip的显示,需要将ViewSettingsDetails.SubItemTipStyle和ItemSettings.TipStyle两个属性设置为ItemTipStyle.Hide。下面是具体的代码定义:
1: using System.Windows.Forms;
2: using Infragistics.Win;
3: using Infragistics.Win.UltraWinListView;
4: using Infragistics.Win.UltraWinToolTip;
5:
6: namespace Artech.ExtendedControls4ToolTip
7: {
8:
9: public class ExtendedUltraListView : UltraListView
10: {
11: private UltraToolTipManager toolTipManager = new UltraToolTipManager();
12:
13: protected override void OnPaint(PaintEventArgs eventArgs)
14: {
15: base.OnPaint(eventArgs);
16: this.ViewSettingsDetails.SubItemTipStyle = SubItemTipStyle.Hide;
17: this.ItemSettings.TipStyle = ItemTipStyle.Hide;
18: }
19:
20: protected override void OnMouseEnterElement(UIElementEventArgs e)
21: {
22: base.OnMouseEnterElement(e);
23: UltraListViewItem enteredItem = e.Element.GetContext(typeof(UltraListViewItem)) as UltraListViewItem;
24: if (enteredItem != null)
25: {
26: UltraToolTipInfo toolTip = new UltraToolTipInfo(enteredItem.Text, ToolTipImage.Default, null, DefaultableBoolean.Default);
27: this.toolTipManager.SetUltraToolTip(this, toolTip);
28: this.toolTipManager.ShowToolTip(this);
29: }
30: }
31:
32: protected override void OnMouseLeaveElement(UIElementEventArgs e)
33: {
34: base.OnMouseLeaveElement(e);
35: UltraListViewItem enteredItem = e.Element.GetContext(typeof(UltraListViewItem)) as UltraListViewItem;
36: if (null != enteredItem)
37: {
38: this.toolTipManager.HideToolTip();
39: }
40: }
41: }
42: }
三、扩展UltraToolbarsManager
右图是应用了扩展后的UltraToolbarsManager,工具栏ToolTip显示的样式,实际上当通过鼠标选择某个菜单项的时候,也具有相同样式的Tooltip相识。如果仔细看的话,你还会发现ToolTip的背景和上面默认的颜色不一样,这是因为在程序初始化后设置了样式。ToolTip的样式也随之发生了变化,以与整个风格相匹配。
扩展后的ExtendedUltraToolbarsManager的实现与上面的方式类似,同样是通过重写OnMouseEnterElement和OnMouseLeaveElement这两个方法。不过有一点不同的是:用于显示ToolTip的ToolTipManager的ShowToolTip接收参数的类型为Control,但是UltraToolbarsManager本身却并不是从Control类型派生。在这里采用了一个变通的方式:定义了一个Control类型的属性ContainerToBindToolTip,通过该属性从外部注定一个绑定ToolTip的控件。ExtendedUltraToolbarsManager定义如下:
1: using System.ComponentModel;
2: using System.Windows.Forms;
3: using Infragistics.Win;
4: using Infragistics.Win.UltraWinToolbars;
5: using Infragistics.Win.UltraWinToolTip;
6:
7: namespace Artech.ExtendedControls4ToolTip
8: {
9: public class ExtendedUltraToolbarsManager : UltraToolbarsManager
10: {
11:
12: private UltraToolTipManager toolTipManager = new UltraToolTipManager();
13:
14: public Control ContainerToBindToolTip
15: { get; set; }
16:
17:
18: public ExtendedUltraToolbarsManager(IContainer container)
19: : base(container)
20: {
21: this.toolTipManager = new UltraToolTipManager();
22: }
23:
24: protected override void OnMouseEnterElement(UIElementEventArgs e)
25: {
26: base.OnMouseEnterElement(e);
27: if (this.ShowToolTips)
28: {
29: this.ShowToolTips = false;
30: }
31:
32: ToolBase tool = e.Element.GetContext(typeof(ToolBase)) as ToolBase;
33: if (null != tool)
34: {
35: UltraToolTipInfo toolTip = new UltraToolTipInfo(tool.CaptionResolved.Replace("&", string.Empty), ToolTipImage.Default, null, DefaultableBoolean.Default);
36: if (null != this.ContainerToBindToolTip)
37: {
38: this.toolTipManager.SetUltraToolTip(ContainerToBindToolTip, toolTip);
39: this.toolTipManager.ShowToolTip(ContainerToBindToolTip);
40: }
41: }
42: }
43:
44: protected override void OnMouseLeaveElement(UIElementEventArgs e)
45: {
46: base.OnMouseLeaveElement(e);
47: ToolBase tool = e.Element.GetContext(typeof(ToolBase)) as ToolBase;
48: if (null != tool)
49: {
50: this.toolTipManager.HideToolTip();
51: }
52: }
53: }
54: }