CodeMirror/OnTopReplica
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Caching in NativeToolStripRenderer to reduce memory usage (System.Version).

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Lorenz Cuno Klopfenstein 2012-11-14 15:56:03 +01:00
parent d6c31c2999
commit 4eacee503e
1 changed files with 18 additions and 4 deletions
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22
OnTopReplica/NativeToolStripRenderer.cs
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@ -37,7 +37,8 @@ namespace Asztal.Szótár {
//See http://msdn2.microsoft.com/en-us/library/bb773210.aspx - "Parts and States"
#region Parts and States
enum MenuParts : int {
enum MenuParts : int {
MENU_MENUITEM_TMSCHEMA = 1,
MENU_MENUDROPDOWN_TMSCHEMA = 2,
MENU_MENUBARITEM_TMSCHEMA = 3,
@ -106,9 +107,11 @@ namespace Asztal.Szótár {
}
const int RP_BACKGROUND = 6;
#endregion
#region Theme helpers
Padding GetThemeMargins(IDeviceContext dc, MarginTypes marginType) {
NativeMethods.MARGINS margins;
try {
@ -137,9 +140,11 @@ namespace Asztal.Szótár {
return hot ? (int)MenuBarItemStates.MBI_DISABLEDHOT : (int)MenuBarItemStates.MBI_DISABLED;
}
}
#endregion
#region Theme subclasses
public ToolbarTheme Theme {
get; set;
}
@ -177,6 +182,7 @@ namespace Asztal.Szótár {
return VisualStyleElement.CreateElement(SubclassPrefix + element.ClassName,
element.Part, element.State);
}
#endregion
VisualStyleRenderer renderer;
@ -380,12 +386,20 @@ namespace Asztal.Szótár {
}
#endregion
private static bool? _isSupportedCache = null;
public static bool IsSupported {
get {
if (!VisualStyleRenderer.IsSupported)
return false;
if (_isSupportedCache.HasValue)
return _isSupportedCache.Value;
return VisualStyleRenderer.IsElementDefined(VisualStyleElement.CreateElement("MENU", (int)MenuParts.MENU_BARBACKGROUND, (int)MenuBarStates.MB_ACTIVE));
if (!VisualStyleRenderer.IsSupported) {
_isSupportedCache = false;
return false;
}
_isSupportedCache = VisualStyleRenderer.IsElementDefined(VisualStyleElement.CreateElement("MENU", (int)MenuParts.MENU_BARBACKGROUND, (int)MenuBarStates.MB_ACTIVE));
return _isSupportedCache.Value;
}
}
}