private static void UserPreferenceChanging(object obj, UserPreferenceChangingEventArgs e)
{
highContrastSettingValid = false;
lowResSettingValid = false;
terminalSettingValid = false;
dropShadowSettingValid = false;
bitsPerPixel = 0;
if (e.Category == UserPreferenceCategory.General)
{
menuAccessKeysUnderlinedValid = false;
}
}
/// <include file='doc\VisualStyleRenderer.uex' path='docs/doc[@for="VisualStyleRenderer.OnThemeChanged"]/*' />
/// <devdoc>
/// <para>
/// Handles the ThemeChanged event. Basically, we need to ensure all per-thread theme handle
/// caches are refreshed.
/// </para>
/// </devdoc>
private static void OnUserPreferenceChanging(object sender, UserPreferenceChangingEventArgs ea) {
if (ea.Category == UserPreferenceCategory.VisualStyle) {
// Let all threads know their cached handles are no longer valid;
// cache refresh will happen at next handle access.
// Note that if the theme changes 2^sizeof(long) times before a thread uses
// its handle, this whole version hack won't work, but I don't see that happening.
globalCacheVersion++;
}
}
private static void OnUserPreferenceChanging(object sender, UserPreferenceChangingEventArgs ea)
{
if (ea.Category == UserPreferenceCategory.VisualStyle)
{
globalCacheVersion += 1L;
}
}
private static void OnUserPreferenceChanging(object sender, UserPreferenceChangingEventArgs e) {
if (e.Category == UserPreferenceCategory.Color && colorTable != null) {
UpdateSystemColors(colorTable);
}
}
static void SystemEvents_UserPreferenceChanging(object sender, UserPreferenceChangingEventArgs e)
{
}
private static void OnUserPreferenceChanging(object sender, UserPreferenceChangingEventArgs e)
{
if (e.Category == UserPreferenceCategory.Window)
{
lock (internalSyncObject)
{
defaultFont = null;
}
}
}
private void UserPreferenceChangingCallback (object o, UserPreferenceChangingEventArgs args)
{
}
private static void OnUserPreferenceChanging(object sender, UserPreferenceChangingEventArgs e) {
// using changing here so that the cache will be cleared by the time the ToolStrip
// hooks onto the changed event.
// SPI_SETNONCLIENTMETRICS is put up in WM_SETTINGCHANGE if the Menu font changes.
// this corresponds to UserPreferenceCategory.Window.
if (e.Category == UserPreferenceCategory.Window) {
lock (internalSyncObject) {
defaultFont = null;
}
}
}
/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// userpreferencechangingeventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this UserPreferenceChangingEventHandler userpreferencechangingeventhandler, Object sender, UserPreferenceChangingEventArgs e, AsyncCallback callback)
{
if(userpreferencechangingeventhandler == null) throw new ArgumentNullException("userpreferencechangingeventhandler");
return userpreferencechangingeventhandler.BeginInvoke(sender, e, callback, null);
}
public void Deny_Unrestricted ()
{
UserPreferenceChangingEventArgs upcea = new UserPreferenceChangingEventArgs (UserPreferenceCategory.Color);
Assert.AreEqual (UserPreferenceCategory.Color, upcea.Category, "Category");
}
