Initial commit

xmbrightness/src/main.c

@@ -0,0 +1,86 @@
+/* C99 */
+
+#define _XOPEN_SOURCE
+#include <Xm/Scale.h>
+#include <Xm/Xm.h>
+#include <Xm/MwmUtil.h>
+#include <X11/Shell.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+void valueChanged (Widget, XtPointer, XtPointer);
+void setBrightness (int);
+int  getBrightness ();
+int  getMaxBrightness ();
+
+int main (int argc, char *argv[]) {
+	XtAppContext application;
+	Widget window = XtVaAppInitialize (
+		&application, "Brightness",
+		NULL, 0,
+		&argc, argv,
+		NULL,
+		XmNtitle, "Battery",
+		NULL);
+		
+	int level   = getBrightness();
+	int max     = getMaxBrightness();
+	int percent =
+		(float)(level) /
+		(float)(max) * 100;
+	
+	Widget scale = XtVaCreateManagedWidget (
+		"Brightness", xmScaleWidgetClass, window,
+		XmNmaximum,   100,
+		XmNminimum,   1,
+		XmNvalue,     percent,
+		NULL);
+	XtAddCallback(scale, XmNvalueChangedCallback, valueChanged, NULL);
+	
+	XtVaSetValues(window, XmNmwmDecorations, MWM_DECOR_BORDER, NULL);
+	XtVaSetValues(window, XmNmwmFunctions, MWM_FUNC_RESIZE, NULL);
+
+	//XtVaSetValues(window, XtNheight, 400, NULL);
+	//XtVaSetValues(window, XtNwidth, 400, NULL);
+	
+	XtRealizeWidget(window);
+	XtAppMainLoop(application);
+}
+
+void valueChanged (Widget scale, XtPointer clientData, XtPointer callData) {
+	(void)(scale);
+	(void)(clientData);
+	XmScaleCallbackStruct *event = (XmScaleCallbackStruct *)(callData);
+	setBrightness(event->value);
+}
+
+void setBrightness (int level) {
+	char command[32] = { 0 };
+	snprintf(command, 32, "brightnessctl s %d%% -q", level);
+	system(command);
+}
+
+int getBrightness () {
+	FILE *stream = popen("brightnessctl g", "r");
+	if (stream == NULL) {
+		fprintf(stderr, "ERR could not get brightness\n");
+		return 1;
+	}
+	int result = 1;
+	fscanf(stream, "%d", &result);
+	pclose(stream);
+	return result;
+}
+
+int getMaxBrightness () {
+	FILE *stream = popen("brightnessctl m", "r");
+	if (stream == NULL) {
+		fprintf(stderr, "ERR could not get brightness\n");
+		return 1;
+	}
+	int result = 1;
+	fscanf(stream, "%d", &result);
+	pclose(stream);
+	return result;
+}