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+/* $Xorg: StripChart.c,v 1.4 2001/02/09 02:03:46 xorgcvs Exp $ */
+
+/***********************************************************
+
+Copyright 1987, 1988, 1994, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+/* $XFree86: xc/lib/Xaw/StripChart.c,v 1.7 2001/01/17 19:42:32 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <X11/IntrinsicP.h>
+#include <X11/StringDefs.h>
+#include <X11/Xfuncs.h>
+#include <X11/Xaw/StripCharP.h>
+#include <X11/Xaw/XawInit.h>
+#include "Private.h"
+
+#define MS_PER_SEC 1000
+
+/*
+ * Class Methods
+ */
+static void XawStripChartInitialize(Widget, Widget, ArgList, Cardinal*);
+static void XawStripChartDestroy(Widget);
+static void XawStripChartRedisplay(Widget, XEvent*, Region);
+static void XawStripChartResize(Widget);
+static Boolean XawStripChartSetValues(Widget, Widget, Widget,
+ ArgList, Cardinal*);
+
+/*
+ * Prototypes
+ */
+static void CreateGC(StripChartWidget, unsigned int);
+static void DestroyGC(StripChartWidget, unsigned int);
+static void draw_it(XtPointer, XtIntervalId*);
+static void MoveChart(StripChartWidget, Bool);
+static int repaint_window(StripChartWidget, int, int);
+
+/*
+ * Initialization
+ */
+#define offset(field) XtOffsetOf(StripChartRec, field)
+static XtResource resources[] = {
+ {
+ XtNwidth,
+ XtCWidth,
+ XtRDimension,
+ sizeof(Dimension),
+ offset(core.width),
+ XtRImmediate,
+ (XtPointer)
+ 120
+ },
+ {
+ XtNheight,
+ XtCHeight,
+ XtRDimension,
+ sizeof(Dimension),
+ offset(core.height),
+ XtRImmediate,
+ (XtPointer)120
+ },
+ {
+ XtNupdate,
+ XtCInterval,
+ XtRInt,
+ sizeof(int),
+ offset(strip_chart.update),
+ XtRImmediate,
+ (XtPointer)10
+ },
+ {
+ XtNminScale,
+ XtCScale,
+ XtRInt,
+ sizeof(int),
+ offset(strip_chart.min_scale),
+ XtRImmediate,
+ (XtPointer)1
+ },
+ {
+ XtNforeground,
+ XtCForeground,
+ XtRPixel,
+ sizeof(Pixel),
+ offset(strip_chart.fgpixel),
+ XtRString,
+ XtDefaultForeground
+ },
+ {
+ XtNhighlight,
+ XtCForeground,
+ XtRPixel,
+ sizeof(Pixel),
+ offset(strip_chart.hipixel),
+ XtRString,
+ XtDefaultForeground
+ },
+ {
+ XtNgetValue,
+ XtCCallback,
+ XtRCallback,
+ sizeof(XtPointer),
+ offset(strip_chart.get_value),
+ XtRImmediate,
+ NULL
+ },
+ {
+ XtNjumpScroll,
+ XtCJumpScroll,
+ XtRInt,
+ sizeof(int),
+ offset(strip_chart.jump_val),
+ XtRImmediate,
+ (XtPointer)DEFAULT_JUMP
+ },
+};
+#undef offset
+
+StripChartClassRec stripChartClassRec = {
+ /* core */
+ {
+ (WidgetClass)&simpleClassRec, /* superclass */
+ "StripChart", /* class_name */
+ sizeof(StripChartRec), /* widget_size */
+ XawInitializeWidgetSet, /* class_initialize */
+ NULL, /* class_part_initialize */
+ False, /* class_inited */
+ XawStripChartInitialize, /* initialize */
+ NULL, /* initialize_hook */
+ XtInheritRealize, /* realize */
+ NULL, /* actions */
+ 0, /* num_actions */
+ resources, /* resources */
+ XtNumber(resources), /* num_resources */
+ NULLQUARK, /* xrm_class */
+ True, /* compress_motion */
+ XtExposeCompressMultiple /* compress_exposure */
+ | XtExposeGraphicsExposeMerged,
+ True, /* compress_enterleave */
+ False, /* visible_interest */
+ XawStripChartDestroy, /* destroy */
+ XawStripChartResize, /* resize */
+ XawStripChartRedisplay, /* expose */
+ XawStripChartSetValues, /* set_values */
+ NULL, /* set_values_hook */
+ NULL, /* set_values_almost */
+ NULL, /* get_values_hook */
+ NULL, /* accept_focus */
+ XtVersion, /* version */
+ NULL, /* callback_private */
+ NULL, /* tm_table */
+ XtInheritQueryGeometry, /* query_geometry */
+ XtInheritDisplayAccelerator, /* display_accelerator */
+ NULL, /* extension */
+ },
+ /* simple */
+ {
+ XtInheritChangeSensitive, /* change_sensitive */
+ }
+};
+
+WidgetClass stripChartWidgetClass = (WidgetClass)&stripChartClassRec;
+
+/*
+ * Implementation
+ */
+/*
+ * Function:
+ * CreateGC
+ *
+ * Parameters:
+ * w - strip chart widget
+ * which - GC's to create
+ *
+ * Description:
+ * Creates the GC's
+ */
+static void
+CreateGC(StripChartWidget w, unsigned int which)
+{
+ XGCValues myXGCV;
+
+ if (which & FOREGROUND) {
+ myXGCV.foreground = w->strip_chart.fgpixel;
+ w->strip_chart.fgGC = XtGetGC((Widget)w, GCForeground, &myXGCV);
+ }
+
+ if (which & HIGHLIGHT) {
+ myXGCV.foreground = w->strip_chart.hipixel;
+ w->strip_chart.hiGC = XtGetGC((Widget)w, GCForeground, &myXGCV);
+ }
+}
+
+/*
+ * Function:
+ * DestroyGC
+ *
+ * Arguments:
+ * w - strip chart widget
+ * which - which GC's to destroy
+ *
+ * Description:
+ * Destroys the GC's
+ */
+static void
+DestroyGC(StripChartWidget w, unsigned int which)
+{
+ if (which & FOREGROUND)
+ XtReleaseGC((Widget)w, w->strip_chart.fgGC);
+
+ if (which & HIGHLIGHT)
+ XtReleaseGC((Widget)w, w->strip_chart.hiGC);
+}
+
+/*ARGSUSED*/
+static void
+XawStripChartInitialize(Widget greq, Widget gnew,
+ ArgList args, Cardinal *num_args)
+{
+ StripChartWidget w = (StripChartWidget)gnew;
+
+ if (w->strip_chart.update > 0)
+ w->strip_chart.interval_id =
+ XtAppAddTimeOut(XtWidgetToApplicationContext(gnew),
+ w->strip_chart.update * MS_PER_SEC,
+ draw_it, (XtPointer)gnew);
+ CreateGC(w, ALL_GCS);
+
+ w->strip_chart.scale = w->strip_chart.min_scale;
+ w->strip_chart.interval = 0;
+ w->strip_chart.max_value = 0.0;
+ w->strip_chart.points = NULL;
+ XawStripChartResize(gnew);
+}
+
+static void
+XawStripChartDestroy(Widget gw)
+{
+ StripChartWidget w = (StripChartWidget)gw;
+
+ if (w->strip_chart.update > 0)
+ XtRemoveTimeOut(w->strip_chart.interval_id);
+ if (w->strip_chart.points)
+ XtFree((char *)w->strip_chart.points);
+ DestroyGC(w, ALL_GCS);
+}
+
+/*
+ * NOTE: This function really needs to recieve graphics exposure
+ * events, but since this is not easily supported until R4 I am
+ * going to hold off until then.
+ */
+/*ARGSUSED*/
+static void
+XawStripChartRedisplay(Widget w, XEvent *event, Region region)
+{
+ if (event->type == GraphicsExpose)
+ (void)repaint_window((StripChartWidget)w, event->xgraphicsexpose.x,
+ event->xgraphicsexpose.width);
+ else
+ (void)repaint_window((StripChartWidget)w, event->xexpose.x,
+ event->xexpose.width);
+}
+
+/*ARGSUSED*/
+static void
+draw_it(XtPointer client_data, XtIntervalId *id)
+{
+ StripChartWidget w = (StripChartWidget)client_data;
+ double value;
+
+ if (w->strip_chart.update > 0)
+ w->strip_chart.interval_id =
+ XtAppAddTimeOut(XtWidgetToApplicationContext((Widget)w),
+ w->strip_chart.update * MS_PER_SEC,draw_it,
+ client_data);
+
+ if (w->strip_chart.interval >= XtWidth(w))
+ MoveChart((StripChartWidget)w, True);
+
+ /* Get the value, stash the point and draw corresponding line */
+ if (w->strip_chart.get_value == NULL)
+ return;
+
+ XtCallCallbacks((Widget)w, XtNgetValue, (XtPointer)&value);
+
+ /*
+ * Keep w->strip_chart.max_value up to date, and if this data
+ * point is off the graph, change the scale to make it fit
+ */
+ if (value > w->strip_chart.max_value) {
+ w->strip_chart.max_value = value;
+ if (XtIsRealized((Widget)w) &&
+ w->strip_chart.max_value > w->strip_chart.scale) {
+ XClearWindow(XtDisplay(w), XtWindow(w));
+ w->strip_chart.interval = repaint_window(w, 0, XtWidth(w));
+ }
+ }
+
+ w->strip_chart.valuedata[w->strip_chart.interval] = value;
+ if (XtIsRealized((Widget)w)) {
+ int y = (int)(XtHeight(w) - XtHeight(w) * value
+ / w->strip_chart.scale);
+
+ XFillRectangle(XtDisplay(w), XtWindow(w), w->strip_chart.fgGC,
+ w->strip_chart.interval, y,
+ 1, XtHeight(w) - y);
+
+ /*
+ * Fill in the graph lines we just painted over
+ */
+ if (w->strip_chart.points != NULL) {
+ w->strip_chart.points[0].x = w->strip_chart.interval;
+ XDrawPoints(XtDisplay(w), XtWindow(w), w->strip_chart.hiGC,
+ w->strip_chart.points, w->strip_chart.scale - 1,
+ CoordModePrevious);
+ }
+
+ XFlush(XtDisplay(w)); /* Flush output buffers */
+ }
+ w->strip_chart.interval++; /* Next point */
+}
+
+/* Blts data according to current size, then redraws the stripChart window
+ * Next represents the number of valid points in data. Returns the (possibly)
+ * adjusted value of next. If next is 0, this routine draws an empty window
+ * (scale - 1 lines for graph). If next is less than the current window width,
+ * the returned value is identical to the initial value of next and data is
+ * unchanged. Otherwise keeps half a window's worth of data. If data is
+ * changed, then w->strip_chart.max_value is updated to reflect the
+ * largest data point
+ */
+static int
+repaint_window(StripChartWidget w, int left, int width)
+{
+ int i, j;
+ int next = w->strip_chart.interval;
+ int scale = w->strip_chart.scale;
+ int scalewidth = 0;
+
+ /* Compute the minimum scale required to graph the data, but don't go
+ lower than min_scale */
+ if (w->strip_chart.interval != 0 || scale <= w->strip_chart.max_value)
+ scale = w->strip_chart.max_value + 1;
+ if (scale < w->strip_chart.min_scale)
+ scale = w->strip_chart.min_scale;
+
+ if (scale != w->strip_chart.scale) {
+ w->strip_chart.scale = scale;
+ left = 0;
+ width = next;
+ scalewidth = XtWidth(w);
+
+ XawStripChartResize((Widget)w);
+
+ if (XtIsRealized((Widget)w))
+ XClearWindow(XtDisplay(w), XtWindow(w));
+ }
+
+ if (XtIsRealized((Widget)w)) {
+ Display *dpy = XtDisplay(w);
+ Window win = XtWindow(w);
+
+ width += left - 1;
+ if (!scalewidth)
+ scalewidth = width;
+
+ if (next < ++width)
+ width = next;
+
+ /* Draw data point lines */
+ for (i = left; i < width; i++) {
+ int y = XtHeight(w) - (XtHeight(w) * w->strip_chart.valuedata[i])
+ / w->strip_chart.scale;
+
+ XFillRectangle(dpy, win, w->strip_chart.fgGC,
+ i, y, 1, XtHeight(w) - y);
+ }
+
+ /* Draw graph reference lines */
+ for (i = 1; i < w->strip_chart.scale; i++) {
+ j = i * ((int)XtHeight(w) / w->strip_chart.scale);
+ XDrawLine(dpy, win, w->strip_chart.hiGC, left, j, scalewidth, j);
+ }
+ }
+ return (next);
+}
+
+/*
+ * Function:
+ * MoveChart
+ *
+ * Parameters:
+ * w - chart widget
+ * blit - blit the bits?
+ *
+ * Description:
+ * Moves the chart over when it would run off the end.
+ */
+static void
+MoveChart(StripChartWidget w, Bool blit)
+{
+ double old_max;
+ int left, i, j;
+ int next = w->strip_chart.interval;
+
+ if (!XtIsRealized((Widget)w))
+ return;
+
+ if (w->strip_chart.jump_val < 0)
+ w->strip_chart.jump_val = DEFAULT_JUMP;
+ if (w->strip_chart.jump_val == DEFAULT_JUMP)
+ j = XtWidth(w) >> 1;
+ else {
+ j = (int)XtWidth(w) - w->strip_chart.jump_val;
+ if (j < 0)
+ j = 0;
+ }
+
+ (void)memmove((char *)w->strip_chart.valuedata,
+ (char *)(w->strip_chart.valuedata + next - j),
+ j * sizeof(double));
+ next = w->strip_chart.interval = j;
+
+ /*
+ * Since we just lost some data, recompute the
+ * w->strip_chart.max_value
+ */
+ old_max = w->strip_chart.max_value;
+ w->strip_chart.max_value = 0.0;
+ for (i = 0; i < next; i++) {
+ if (w->strip_chart.valuedata[i] > w->strip_chart.max_value)
+ w->strip_chart.max_value = w->strip_chart.valuedata[i];
+ }
+
+ if (!blit)
+ return;
+
+ if (old_max != w->strip_chart.max_value) {
+ XClearWindow(XtDisplay(w), XtWindow(w));
+ repaint_window(w, 0, XtWidth(w));
+ return;
+ }
+
+ XCopyArea(XtDisplay((Widget)w), XtWindow((Widget)w), XtWindow((Widget)w),
+ w->strip_chart.hiGC, (int)XtWidth(w) - j, 0, j, XtHeight(w), 0, 0);
+
+ XClearArea(XtDisplay((Widget)w), XtWindow((Widget)w),
+ j, 0, XtWidth(w) - j, XtHeight(w), False);
+
+ /* Draw graph reference lines */
+ left = j;
+ for (i = 1; i < w->strip_chart.scale; i++) {
+ j = i * (XtHeight(w) / w->strip_chart.scale);
+ XDrawLine(XtDisplay((Widget)w), XtWindow((Widget)w),
+ w->strip_chart.hiGC, left, j, XtWidth(w), j);
+ }
+}
+
+/*ARGSUSED*/
+static Boolean
+XawStripChartSetValues(Widget current, Widget request, Widget cnew,
+ ArgList args, Cardinal *num_args)
+{
+ StripChartWidget old = (StripChartWidget)current;
+ StripChartWidget w = (StripChartWidget)cnew;
+ Bool ret_val = False;
+ unsigned int new_gc = NO_GCS;
+
+ if (w->strip_chart.update != old->strip_chart.update) {
+ if (old->strip_chart.update > 0)
+ XtRemoveTimeOut(old->strip_chart.interval_id);
+ if (w->strip_chart.update > 0)
+ w->strip_chart.interval_id =
+ XtAppAddTimeOut(XtWidgetToApplicationContext(cnew),
+ w->strip_chart.update * MS_PER_SEC,
+ draw_it, (XtPointer)w);
+ }
+
+ if (w->strip_chart.min_scale > w->strip_chart.max_value + 1)
+ ret_val = True;
+
+ if (w->strip_chart.fgpixel != old->strip_chart.fgpixel) {
+ new_gc |= FOREGROUND;
+ ret_val = True;
+ }
+
+ if (w->strip_chart.hipixel != old->strip_chart.hipixel) {
+ new_gc |= HIGHLIGHT;
+ ret_val = True;
+ }
+
+ DestroyGC(old, new_gc);
+ CreateGC(w, new_gc);
+
+ return (ret_val);
+}
+
+/*
+ * Function:
+ * XawStripChartResize
+ *
+ * Parameters:
+ * w - StripChart widget
+ *
+ * Description:
+ * Sets up the polypoint that will be used to draw in the graph lines.
+ */
+static void
+XawStripChartResize(Widget widget)
+{
+ StripChartWidget w = (StripChartWidget)widget;
+ XPoint *points;
+ Cardinal size;
+ int i;
+
+ if (w->strip_chart.scale <= 1) {
+ XtFree((char *)w->strip_chart.points);
+ w->strip_chart.points = NULL;
+ return;
+ }
+
+ size = sizeof(XPoint) * (w->strip_chart.scale - 1);
+
+ points = (XPoint *)XtRealloc((XtPointer)w->strip_chart.points, size);
+ w->strip_chart.points = points;
+
+ /* Draw graph reference lines into clip mask */
+
+ for (i = 1; i < w->strip_chart.scale; i++) {
+ points[i - 1].x = 0;
+ points[i - 1].y = XtHeight(w) / w->strip_chart.scale;
+ }
+}
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