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authorfvogel <fvogelnew1@free.fr>2015-11-10 21:03:04 (GMT)
committerfvogel <fvogelnew1@free.fr>2015-11-10 21:03:04 (GMT)
commitb965bde49f462725f54d29e9e8b8008f79fe43b9 (patch)
treef1476ada050bc4a05b279446f76a83d25829be84 /generic/tkTextDisp.c
parentb4ab9d79f99aab6cfb1014e82271308f4d6184c9 (diff)
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Implementation of TIP #438 - Solution using virtual eventstip_438_events
Diffstat (limited to 'generic/tkTextDisp.c')
-rw-r--r--generic/tkTextDisp.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/generic/tkTextDisp.c b/generic/tkTextDisp.c
index 6036222..a275b28 100644
--- a/generic/tkTextDisp.c
+++ b/generic/tkTextDisp.c
@@ -590,6 +590,8 @@ static int TextGetScrollInfoObj(Tcl_Interp *interp,
Tcl_Obj *CONST objv[], double *dblPtr,
int *intPtr);
static void AsyncUpdateLineMetrics(ClientData clientData);
+static void GenerateMetricsEvent(TkText *textPtr,
+ CONST char *eventname);
static void AsyncUpdateYScrollbar(ClientData clientData);
static int IsStartOfNotMergedLine(TkText *textPtr,
CONST TkTextIndex *indexPtr);
@@ -2944,6 +2946,7 @@ AsyncUpdateLineMetrics(
if (textPtr->refCount == 0) {
ckfree((char *) textPtr);
}
+ GenerateMetricsEvent(textPtr, "MetricsDone");
return;
}
dInfoPtr->currentMetricUpdateLine = lineNum;
@@ -2960,6 +2963,51 @@ AsyncUpdateLineMetrics(
/*
*----------------------------------------------------------------------
*
+ * GenerateMetricsEvent --
+ *
+ * Send an event related to the text widget metrics asynchronous update
+ * Two events are used:
+ * - <<MetricsOutdated>>: the asynchronous update of line metrics is
+ * currently running
+ * - <<MetricsDone>> : the asynchronous update of line metrics is
+ * over
+ * This is equivalent to:
+ * event generate $textWidget <<MetricsOutdated>>
+ * or
+ * event generate $textWidget <<MetricsDone>>
+ *
+ * Results:
+ * None
+ *
+ * Side effects:
+ * May force the text window into existence.
+ * If corresponding bindings are present, they will trigger.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+GenerateMetricsEvent(
+ TkText *textPtr, /* Information about text widget. */
+ CONST char *eventname) /* Name of the virtual event to send. */
+{
+ union {XEvent general; XVirtualEvent virtual;} event;
+
+ Tk_MakeWindowExist(textPtr->tkwin);
+
+ memset(&event, 0, sizeof(event));
+ event.general.xany.type = VirtualEvent;
+ event.general.xany.serial = NextRequest(Tk_Display(textPtr->tkwin));
+ event.general.xany.send_event = False;
+ event.general.xany.window = Tk_WindowId(textPtr->tkwin);
+ event.general.xany.display = Tk_Display(textPtr->tkwin);
+ event.virtual.name = Tk_GetUid(eventname);
+ Tk_HandleEvent(&event.general);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* TkTextUpdateLineMetrics --
*
* This function updates the pixel height calculations of a range of
@@ -3336,6 +3384,7 @@ TextInvalidateLineMetrics(
textPtr->refCount++;
dInfoPtr->lineUpdateTimer = Tcl_CreateTimerHandler(1,
AsyncUpdateLineMetrics, (ClientData) textPtr);
+ GenerateMetricsEvent(textPtr, "MetricsOutdated");
}
}
@@ -5040,6 +5089,7 @@ TkTextRelayoutWindow(
textPtr->refCount++;
dInfoPtr->lineUpdateTimer = Tcl_CreateTimerHandler(1,
AsyncUpdateLineMetrics, (ClientData) textPtr);
+ GenerateMetricsEvent(textPtr, "MetricsOutdated");
}
}
}