Don't get an EVENT_COMMIT from graph control

[James@Motorola]

Hi,

I need to obtain the cursor coordinates from a graph control. My cursor snaps to the plot but never generates an EVENT_COMMIT, I see and EVENT_LEFT_CLICK and EVENT_VAL_CHANGED, but these give me the last coordinates not the current ones.

I get the same effect on the demo graphcursors.prj if I put a printf("event = %d", event); before or after the UpdateMarker switch statement.


int CVICALLBACK graphCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
int activeCursorNumber = 0;
int plotHandle;
int arrayIndex;
int index;
double x,y;
char tempString[10];

switch (event) {
case EVENT_COMMIT:

GetActiveGraphCursor (panel, control, &activeCursorNumber);

if(activeCursorNumber) {

GetGraphCursor (panel, control, activeCursorNumber, &x, &y);
GetGraphCursorIndex (panel, control, activeCursorNumber, &plotHandle, &arrayIndex);

/* get the handle for the graph */
for(index = 0; index < MAX_CHANNELS; index++) {
if(gDynamicPlotHandle[index] == plotHandle)
break;
}

SetCtrlVal (gPanelHandle[CURSOR_PANEL], CURSOR_STG_PLOT_1, scanInfo[index]->plotName);

SetCtrlVal (gPanelHandle[CURSOR_PANEL], CURSOR_NUM_TEMP_1, y);

convertSecsToTime(x, tempString);
SetCtrlVal (gPanelHandle[CURSOR_PANEL], CURSOR_STG_TIME_1, tempString);

}
break;
}
return 0;
}

[Rac]

Hi,
it does not come from your sourcecode, but from your panel.
Double click on your graph to see the control settings and set the "Control Mode" to "Hot" instead of "Normal".

[James@Motorola]

Thanks for your reply, the graphs control mode is already set to VAL_HOT.
But I still can't get an EVENT_COMMIT.
I am genertaing 8 graphs onto 8 panels programatically here is the code I generate the graphs with:


/* create a graph control */
gDynamicGraphHandle[graphIndex] = NewCtrl (gDynamicPanelHandle[graphIndex], CTRL_GRAPH, tempString, 0, 0);
InstallCtrlCallback (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], graphCallback, NULL);

/* set control mode */
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_CTRL_MODE, VAL_HOT);

/* configure graph colours */
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_PLOT_BGCOLOR, VAL_BLACK);
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_GRID_COLOR, VAL_WHITE);

/* configure graph size */
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_WIDTH, 600);
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_HEIGHT, 300);

/* configure graph the Y axis */
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_YNAME, "Temperature (°C)");
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_YDIVISIONS, NUMBER_OF_DIVISIONS);
SetAxisScalingMode (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], VAL_LEFT_YAXIS, VAL_MANUAL, 0, 100);

/* configure graph the X axis */
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_XNAME, "Time (seconds)");
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_XDIVISIONS, NUMBER_OF_DIVISIONS);
SetAxisScalingMode (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], VAL_BOTTOM_XAXIS , VAL_MANUAL, 0, TIME_1_MINUTE * NUMBER_OF_DIVISIONS);

/* configure the pan and scan */
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_ENABLE_ZOOM_AND_PAN, TRUE);
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_CTRL_MODE, VAL_NORMAL);

SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_LEGEND_VISIBLE, TRUE);
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_LEGEND_SHOW_SAMPLES, TRUE);

[Rac]

No, your control mode is set to VAL_NORMAL again with following line from your code:
SetCtrlAttribute (gDynamicPanelHandle[graphIndex], gDynamicGraphHandle[graphIndex], ATTR_CTRL_MODE, VAL_NORMAL);
!!!

[James@Motorola]

Doah

Sorry about that I didn't notice I had set it twice cheers for your help.

James