Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebParts / LayoutEditorPart.cs / 1 / LayoutEditorPart.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.WebControls.WebParts { using System; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Globalization; using System.Security.Permissions; using System.Web.UI; using System.Web.UI.WebControls; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public sealed class LayoutEditorPart : EditorPart { private DropDownList _chromeState; private DropDownList _zone; // private TextBox _zoneIndex; private string _chromeStateErrorMessage; private string _zoneIndexErrorMessage; private const int TextBoxColumns = 10; private const int MinZoneIndex = 0; private bool CanChangeChromeState { get { WebPart webPart = WebPartToEdit; if (!webPart.Zone.AllowLayoutChange) { return false; } else if (!webPart.AllowMinimize) { // If AllowMinimize is false, the dropdown can be used to restore the WebPart // but not to minimize the WebPart. return (webPart.ChromeState == PartChromeState.Minimized); } else { return true; } } } private bool CanChangeZone { get { WebPart webPart = WebPartToEdit; WebPartZoneBase currentZone = webPart.Zone; return (currentZone.AllowLayoutChange && webPart.AllowZoneChange); } } private bool CanChangeZoneIndex { get { return WebPartToEdit.Zone.AllowLayoutChange; } } [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), Themeable(false)] public override string DefaultButton { get { return base.DefaultButton; } set { base.DefaultButton = value; } } public override bool Display { get { // Don't return base.Display, since we want to show the layout editor part even // if AllowEdit is false on the WebPartToEdit, or the WebPartToEdit is a ProxyWebPart. return true; } } private bool HasError { get { return (_chromeStateErrorMessage != null || _zoneIndexErrorMessage != null); } } [ WebSysDefaultValue(SR.LayoutEditorPart_PartTitle), ] public override string Title { get { string s = (string)ViewState["Title"]; return (s != null) ? s : SR.GetString(SR.LayoutEditorPart_PartTitle); } set { ViewState["Title"] = value; } } public override bool ApplyChanges() { WebPart webPart = WebPartToEdit; if (webPart != null) { EnsureChildControls(); try { if (CanChangeChromeState) { TypeConverter chromeStateConverter = TypeDescriptor.GetConverter(typeof(PartChromeState)); webPart.ChromeState = (PartChromeState)chromeStateConverter.ConvertFromString(_chromeState.SelectedValue); } } catch (Exception e) { _chromeStateErrorMessage = CreateErrorMessage(e.Message); } int zoneIndex = webPart.ZoneIndex; if (CanChangeZoneIndex) { if (Int32.TryParse(_zoneIndex.Text, NumberStyles.Integer, CultureInfo.CurrentCulture, out zoneIndex)) { if (zoneIndex < MinZoneIndex) { _zoneIndexErrorMessage = SR.GetString( SR.EditorPart_PropertyMinValue, MinZoneIndex.ToString(CultureInfo.CurrentCulture)); } } else { _zoneIndexErrorMessage = SR.GetString(SR.EditorPart_PropertyMustBeInteger); } } WebPartZoneBase oldZone = webPart.Zone; WebPartZoneBase newZone = oldZone; if (CanChangeZone) { newZone = WebPartManager.Zones[_zone.SelectedValue]; } // Do not call MoveWebPart if the WebPart is currently in the correct position (VSWhidbey 374634) if (_zoneIndexErrorMessage == null && oldZone.AllowLayoutChange && newZone.AllowLayoutChange && (webPart.Zone != newZone || webPart.ZoneIndex != zoneIndex)) { try { WebPartManager.MoveWebPart(webPart, newZone, zoneIndex); } catch (Exception e) { // Zone and ZoneIndex are set at the same time. Use the _zoneIndexErrorMessage, since it is // more likely that a bogus ZoneIndex would cause an error. _zoneIndexErrorMessage = CreateErrorMessage(e.Message); } } } return !HasError; } protected internal override void CreateChildControls() { ControlCollection controls = Controls; controls.Clear(); TypeConverter chromeStateConverter = TypeDescriptor.GetConverter(typeof(PartChromeState)); _chromeState = new DropDownList(); _chromeState.Items.Add(new ListItem(SR.GetString(SR.PartChromeState_Normal), chromeStateConverter.ConvertToString(PartChromeState.Normal))); _chromeState.Items.Add(new ListItem(SR.GetString(SR.PartChromeState_Minimized), chromeStateConverter.ConvertToString(PartChromeState.Minimized))); controls.Add(_chromeState); // Add all zones to dropdown in CreateChildControls. Items will be selected and/or disabled // in SyncChanges. Assumes no Zones are added or removed during page execution. _zone = new DropDownList(); WebPartManager manager = WebPartManager; if (manager != null) { WebPartZoneCollection zones = manager.Zones; if (zones != null) { foreach (WebPartZoneBase zone in zones) { ListItem item = new ListItem(zone.DisplayTitle, zone.ID); _zone.Items.Add(item); } } } controls.Add(_zone); _zoneIndex = new TextBox(); _zoneIndex.Columns = TextBoxColumns; controls.Add(_zoneIndex); // We don't need viewstate enabled on our child controls. Disable for perf. foreach (Control c in controls) { c.EnableViewState = false; } } protected internal override void OnPreRender(EventArgs e) { base.OnPreRender(e); // We want to synchronize the EditorPart to the state of the WebPart on every page load, // so we stay current if the WebPart changes in the background. if (Display && Visible && !HasError) { SyncChanges(); } } protected internal override void RenderContents(HtmlTextWriter writer) { if (Page != null) { Page.VerifyRenderingInServerForm(this); } // HACK: Need this for child controls to be created at design-time when control is inside template EnsureChildControls(); if (DesignMode) { // Add sample zone to dropdown _zone.Items.Add(SR.GetString(SR.Zone_SampleHeaderText)); } string[] propertyDisplayNames = new string[] { SR.GetString(SR.LayoutEditorPart_ChromeState), SR.GetString(SR.LayoutEditorPart_Zone), SR.GetString(SR.LayoutEditorPart_ZoneIndex), }; WebControl[] propertyEditors = new WebControl[] { _chromeState, _zone, _zoneIndex, }; string[] errorMessages = new string[] { _chromeStateErrorMessage, null, _zoneIndexErrorMessage, }; RenderPropertyEditors(writer, propertyDisplayNames, null /* propertyDescriptions */, propertyEditors, errorMessages); } public override void SyncChanges() { WebPart webPart = WebPartToEdit; Debug.Assert(webPart != null); if (webPart != null) { WebPartZoneBase currentZone = webPart.Zone; bool allowLayoutChange = currentZone.AllowLayoutChange; EnsureChildControls(); TypeConverter chromeStateConverter = TypeDescriptor.GetConverter(typeof(PartChromeState)); _chromeState.SelectedValue = chromeStateConverter.ConvertToString(webPart.ChromeState); _chromeState.Enabled = CanChangeChromeState; WebPartManager manager = WebPartManager; Debug.Assert(manager != null); if (manager != null) { WebPartZoneCollection zones = manager.Zones; bool allowZoneChange = webPart.AllowZoneChange; _zone.ClearSelection(); foreach (ListItem item in _zone.Items) { string zoneID = item.Value; WebPartZoneBase zone = zones[zoneID]; if (zone == currentZone || (allowZoneChange && zone.AllowLayoutChange)) { item.Enabled = true; } else { item.Enabled = false; } if (zone == currentZone) { item.Selected = true; } } _zone.Enabled = CanChangeZone; } _zoneIndex.Text = webPart.ZoneIndex.ToString(CultureInfo.CurrentCulture); _zoneIndex.Enabled = CanChangeZoneIndex; } } } }
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