Changeset 1086 for trunk/MagicSoft/Mars/mbase/MGList.cc

Timestamp:

11/16/01 15:59:05 (23 years ago)

Author:

tbretz

Message:

*** empty log message ***

File:

• trunk/MagicSoft/Mars/mbase/MGList.cc (modified) (2 diffs)

trunk/MagicSoft/Mars/mbase/MGList.cc

@@ -38 +38 @@
 
 #include <TClass.h>
+#include <TGClient.h>
 #include <TGWidget.h>
+#include <TGPicture.h>
 
 
 ClassImp(MGList);
+
+// --------------------------------------------------------------------------
+//
+//  Before destroying the list with all its contents free all TGPicture
+//  objects in the list.
+//
+#include <TRefCnt.h>
+
+MGList::~MGList()
+{
+    TObject *obj;
+    TIter Next(this);
+    while ((obj=Next()))
+    {
+        if (!obj->InheritsFrom(TGPicture::Class()))
+            continue;
+
+        //
+        // Remove the object first. Otherwise we would remove
+        // a non existing object...
+        //
+        Remove(obj);
+        gClient->FreePicture((TGPicture*)obj);
+    }
+}
 
 // --------------------------------------------------------------------------
@@ -137 +164 @@
 // --------------------------------------------------------------------------
 //
+//  Adds the picture physically to the list. The list takes care of that
+//   - The picture is freed as often as it was retrieved from gClient
+//
+void MGList::AddPicture(const TGPicture *pic)
+{
+    //
+    // Check whether the picture exists
+    //
+    if (!pic)
+    {
+        cout << "Warning: Requested picture not found... ignored." << endl;
+        return;
+    }
+
+    //
+    // Add the picture to the list
+    //
+    TList::Add(const_cast<TGPicture*>(pic));
+}
+
+// --------------------------------------------------------------------------
+//
+//  This gets a picture from the picture pool of the TGClient-object.
+//  The pictures are freed automatically in the dstructor of the list.
+//  The picture counts itself how often it got used, so that only
+//  the first call to GetPicture will craete it and the last call to
+//  FreePicture will destroy it. If you access the picture only via
+//  MGList::GetPicture you don't have to care about.
+//
+//  Don't try to call FreePicture by yourself for a picture gotten by
+//  GetPicture. This is independant of the kIsOwner bit.
+//
+const TGPicture *MGList::GetPicture(const char *name)
+{
+    const TGPicture *pic = gClient->GetPicture(name);
+    AddPicture(pic);
+    return pic;
+}
+
+// --------------------------------------------------------------------------
+//
+//  This gets a picture from the picture pool of the TGClient-object.
+//  The pictures are freed automatically in the dstructor of the list.
+//  The picture counts itself how often it got used, so that only
+//  the first call to GetPicture will craete it and the last call to
+//  FreePicture will destroy it. If you access the picture only via
+//  MGList::GetPicture you don't have to care about.
+//
+//  Don't try to call FreePicture by yourself for a picture gotten by
+//  GetPicture. This is independant of the kIsOwner bit.
+//
+const TGPicture *MGList::GetPicture(const char *name, Int_t width, Int_t height)
+{
+    const TGPicture *pic = gClient->GetPicture(name, width, height);
+    AddPicture(pic);
+    return pic;
+}
+// --------------------------------------------------------------------------
+//
 //  Search the list for a object derived from TGidget which has the given
 //  widget id. Returns a pointer to this object otherwise NULL.