+typedef enum _DrawableItems DrawableItems;
+enum _DrawableItems {
+ ITEM_TEXT, ITEM_ICON, ITEM_LINE, ITEM_POINT, ITEM_BACKGROUND
+};
+
+
+typedef enum _RelPos {
+ OVER, MIDDLE, UNDER
+} RelPos;
+
+
+/* The DrawContext keeps information about the current drawing position and
+ * the previous one, so we can use both to draw lines.
+ *
+ * over : position for drawing over the middle line.
+ * middle : middle line position.
+ * under : position for drawing under the middle line.
+ *
+ * the modify_* are used to take into account that we should go forward
+ * when we draw a text, an arc or an icon, while it's unneeded when we
+ * draw a line or background.
+ *
+ */
+
+
+struct _DrawContext {
+ GdkDrawable *drawable;
+ GdkGC *gc;
+ PangoLayout *pango_layout;
+
+ DrawInfo *Current;
+ DrawInfo *Previous;
+};
+
+/* LttvExecutionState is accessible through the LttvTracefileState. Is has
+ * a pointer to the LttvProcessState which points to the top of stack
+ * execution state : LttvExecutionState *state.
+ *
+ * LttvExecutionState contains (useful here):
+ * LttvExecutionMode t,
+ * LttvExecutionSubmode n,
+ * LttvProcessStatus s
+ *
+ *
+ * LttvTraceState will be used in the case we need the string of the
+ * different processes, eventtype_names, syscall_names, trap_names, irq_names.
+ *
+ * LttvTracefileState also gives the cpu_name and, as it herits from
+ * LttvTracefileContext, it gives the LttEvent structure, which is needed
+ * to get facility name and event name.
+ */
+struct _DrawInfo {
+ ItemInfo *over;
+ ItemInfo *middle;
+ ItemInfo *under;
+
+ ItemInfo *modify_over;
+ ItemInfo *modify_middle;
+ ItemInfo *modify_under;
+ LttvProcessStatus status;
+};
+
+struct _ItemInfo {
+ gint x, y;
+};
+
+/*
+ * Structure used to keep information about icons.
+ */
+struct _IconStruct {
+ GdkPixmap *pixmap;
+ GdkBitmap *mask;
+};