Re: Updating verbs in the PropertyGrid

From: Jacob (js_at_hotmail.com)
Date: 10/22/04 

Date: Thu, 21 Oct 2004 22:47:41 -0700

Thank you for your great answer, but it's a solution to a little bit
different problem. I've had no problems, enabling/disabling and setting the
verbs to visible/invisible. The problem is ADDING verbs and REMOVING verbs
from the collection. The changes made to the collection don't seem to get
updated until after the control is deselected and reselected again. I poked
around some things with Reflector and found that the PropertyGrid keeps its
own array of verbs, different from the collection that is edited in the
ControlDesigner. That seems to be the problem. The PropertyGrid's array
doesn't get updated when a property is changed on the control and the
control is still selected until after you deselect it and reselect it again.
Do you have an answer for this one?

Jacob

P.S. - I've tried using the ISelectionService to deselect all controls and
reselect my control after the control's property is changed but it still
won't update the PropertyGrids verbs unless you deselect and reselect
yourself.

"Joey Calisay" <hcalisay@codex-systems.com> wrote in message
news:eE7M4QxtEHA.2804@TK2MSFTNGP14.phx.gbl...
>I forgot to include the key thing: utilize the ISelectionService and
>provide
> an eventhandler for its SelectionChanged. When your control is selected,
> refresh the designerverbs:
>
> private void OnSelectionServiceSelectionChanged(object sender, EventArgs
> e)
>
> {
>
> ISelectionService ss = GetService(typeof(ISelectionService)) as
> ISelectionService;
>
> if (ss.SelectionCount == 1 && ss.PrimarySelection is
> CdxTabControlAdvanced)
>
> {
>
> this.ModifyMenu();
>
> }
>
> }
>
>
>
> Added wireups on the Initialize method of the designer:
>
>
>
> IDesignerHost host = GetService(typeof(IDesignerHost)) as IDesignerHost;
>
> ISelectionService ss = GetService(typeof(ISelectionService)) as
> ISelectionService;
>
> if (ss != null)
>
> {
>
> ss.SelectionChanged +=new
> EventHandler(e_OnISelectionServiceSelectionChanged);
>
> }
>
>
> sorry for the mess...
> "Joey Calisay" <hcalisay@codex-systems.com> wrote in message
> news:eW1qXJxtEHA.3200@TK2MSFTNGP09.phx.gbl...
>> you just have to have a reference of the designerverbs on the designer
> class
>> level to modify their properties on your OnComponentChanged eventhandler
>>
>> public class CdxTabControlAdvancedDesigner :
>> System.Windows.Forms.Design.ParentControlDesigner
>>
>> {
>>
>> private DesignerVerb m_verbRemoveTab = null;
>>
>> private DesignerVerb m_verbAddTab = null;
>>
>> private void OnComponentChanged(object sender, ComponentChangedEventArgs
> e)
>>
>> {
>>
>> //Modify the designerverbs here
>>
>> if (e.Component = this.Component) this.ModifyMenu();
>>
>> }
>>
>> protected virtual void ModifyMenu()
>>
>> {
>>
>> m_verbRemoveTab.Enabled = false;
>>
>> if (this.CdxTabControlAdvanced.aaTabButtons.Count > 0)
>>
>> {
>>
>> m_verbRemoveTab.Enabled = true;
>>
>> }
>>
>> }
>>
>> public CdxTabControlAdvancedDesigner()
>>
>> {
>>
>> this.m_verbAddTab = new DesignerVerb("Add Tab", new
>> EventHandler(this.e_OnAddTab));
>>
>> this.m_verbRemoveTab = new DesignerVerb("Remove Tab", new
>> EventHandler(this.e_OnRemoveTab));
>>
>> base.Verbs.AddRange(new DesignerVerb[] {this.m_verbAddTab,
>> this.m_verbRemoveTab});
>>
>> }
>>
>> protected override void Dispose(bool bIsDisposing)
>>
>> {
>>
>> IComponentChangeService cs = GetService(typeof(IComponentChangeService))
> as
>> IComponentChangeService;
>>
>> if (cs != null)
>>
>> {
>>
>> cs.ComponentChanged -=new
> ComponentChangedEventHandler(OnComponentChanged);
>>
>> }
>>
>> base.Dispose(bIsDisposing);
>>
>> }
>>
>> public override void Initialize(IComponent Icomponent)
>>
>> {
>>
>> base.Initialize(Icomponent);
>>
>> IComponentChangeService cs = GetService(typeof(IComponentChangeService))
> as
>> IComponentChangeService;
>>
>> if (cs != null)
>>
>> {
>>
>> cs.ComponentChanged +=new
> ComponentChangedEventHandler(OnComponentChanged);
>>
>> }
>>
>> ModifyMenu();
>>
>> }
>>
>> }
>>
>> "Jacob" <js@hotmail.com> wrote in message
>> news:eA$aAwrtEHA.1336@TK2MSFTNGP10.phx.gbl...
>> > I'm working on a component (with a custom designer) where the designer
>> verbs
>> > change based on what a property is set to. The problem is,... it
>> > appears
>> > that the designer keeps its own cache of the verbs such that when I
> change
>> > the property of my component, I have to click off the component and
>> > then
>> > back onto it to update the verb links listed in the PropertyGrid. I
> can't
>> > explain it any simpler than that. If you've tried to dynamically change
>> the
>> > verbs before, changing the context menu verbs is easy, but changing the
>> > links in the property grid without reselecting the component is proving
> to
>> > be very difficult. Anybody have the answer?
>> >
>> >
>> > Thanks,
>> > Jacob
>> >
>> >
>> > P.S. - Some sample code...
>> >
>> > internal class MyCustomDesigner : ControlDesigner
>> >
>> > {
>> >
>> >
>> >
>> >
>> >
>> > public override DesignerVerbCollection Verbs
>> >
>> > {
>> >
>> >
>> >
>> > get
>> >
>> > {
>> >
>> > DesignerVerbCollection verbs = new DesignerVerbCollection();
>> >
>> > // Adding of custom verbs here....
>> >
>> > return verbs;
>> >
>> > }
>> >
>> > }
>> >
>> >
>> >
>> > public override void Initialize(IComponent component)
>> >
>> > {
>> >
>> >
>> >
>> > base.Initialize(component);
>> >
>> > // Be notified when properties are changed.
>> >
>> > IComponentChangeService service = GetService(
>> >
>> > typeof(IComponentChangeService)) as IComponentChangeService;
>> >
>> > if(service != null)
>> >
>> > service.ComponentChanged +=
>> >
>> > new ComponentChangedEventHandler(OnComponentChanged);
>> >
>> > }
>> >
>> >
>> >
>> > #region Private Methods
>> >
>> > private void OnComponentChanged(object sender,
>> > ComponentChangedEventArgs
>> e)
>> >
>> > {
>> >
>> > if(e.Component == this.Component && e.Member != null && e.Member.Name
>> > ==
>> > "Icon")
>> >
>> > {
>> >
>> > // This is where I want to change the verbs displayed.
>> >
>> >
>> >
>> > }
>> >
>> > }
>> >
>> >
>> >
>> > }
>> >
>> >
>>
>>
>
>

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