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- /*
- * $XConsortium: Scale.c,v 1.15 91/08/26 11:00:15 gildea Exp $
- *
- * Copyright 1989 Massachusetts Institute of Technology
- *
- * 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, and that the name of M.I.T. not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission. M.I.T. makes no representations about the
- * suitability of this software for any purpose. It is provided "as is"
- * without express or implied warranty.
- *
- * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
- * 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.
- *
- * Author: Davor Matic, MIT X Consortium
- */
-
-
- #include <stdio.h>
- #include <ctype.h>
- #include <string.h>
- #include <math.h>
- #include <X11/IntrinsicP.h>
- #include <X11/StringDefs.h>
- #include <X11/Xaw/XawInit.h>
- #include "ScaleP.h"
- #include <X11/Xosdefs.h>
-
- #define myrint(x) floor(x + 0.5)
-
- #ifndef X_NOT_STDC_ENV
- #include <stdlib.h>
- #endif
-
- #if defined(ISC) && defined(SYSV) && defined(SYSV386) && __STDC__
- extern double atof(char *);
- #endif
-
- #define streq(a,b) (strcmp( (a), (b) ) == 0)
- #define min(x, y) (x > y ? y : x)
- #define max(x, y) (x < y ? y : x)
-
- #define DefaultBufferSize 1024
- #define DefaultScaleFactor NULL
-
- #define Offset(field) XtOffsetOf(ScaleRec, scale.field)
-
- static XtResource resources[] = {
- {XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel),
- Offset(foreground_pixel), XtRString, (XtPointer) XtDefaultForeground},
- {XtNgravity, XtCGravity, XtRGravity, sizeof(XtGravity),
- Offset(gravity), XtRImmediate, (XtPointer) "ForgetGravity"},
- {XtNinternalWidth, XtCWidth, XtRDimension, sizeof(Dimension),
- Offset(internal_width), XtRImmediate, (XtPointer) 2},
- {XtNinternalHeight, XtCHeight, XtRDimension, sizeof(Dimension),
- Offset(internal_height), XtRImmediate, (XtPointer) 2},
- {XtNresize, XtCResize, XtRBoolean, sizeof(Boolean),
- Offset(resize), XtRImmediate, (XtPointer) True},
- {XtNautoscale, XtCAutoscale, XtRBoolean, sizeof(Boolean),
- Offset(autoscale), XtRImmediate, (XtPointer) True},
- {XtNproportional, XtCProportional, XtRBoolean, sizeof(Boolean),
- Offset(proportional), XtRImmediate, (XtPointer) True},
- {XtNscaleX, XtCScaleFactor, XtRString, sizeof(String),
- Offset(scale_x_str), XtRImmediate, (XtPointer) DefaultScaleFactor},
- {XtNscaleY, XtCScaleFactor, XtRString, sizeof(String),
- Offset(scale_y_str), XtRImmediate, (XtPointer) DefaultScaleFactor},
- {XtNaspectRatio, XtCAspectRatio, XtRString, sizeof(String),
- Offset(aspect_ratio_str), XtRImmediate, (XtPointer) "1.0"},
- {XtNprecision, XtCPrecision, XtRString, sizeof(String),
- Offset(precision_str), XtRImmediate, (XtPointer) "0.001"},
- {XtNimage, XtCImage, XtRImage, sizeof(XImage*),
- Offset(image), XtRImmediate, (XtPointer) NULL},
- {XtNpasteBuffer, XtCPasteBuffer, XtRBoolean, sizeof(Boolean),
- Offset(paste_buffer), XtRImmediate, (XtPointer) False},
- {XtNbufferSize, XtCBufferSize, XtRCardinal, sizeof(Cardinal),
- Offset(buffer_size), XtRImmediate, (XtPointer) DefaultBufferSize},
- {XtNuserData, XtCuserData, XtRuserData, sizeof(XtPointer),
- Offset(userData), XtRImmediate, (XtPointer) NULL},
- { XtNvisual, XtCvisual, XtRVisual, sizeof(Visual*),
- Offset(visual), XtRImmediate, CopyFromParent}
- };
-
- #undef Offset
-
- static void ClassInitialize();
- static void Initialize();
- static void Realize();
- static void Redisplay();
- static void Resize();
- static void Destroy();
- static Boolean SetValues();
-
- void SWUnscale();
- void SWAutoscale();
- void SWInitialSize();
- void RequestSelection();
- void GrabSelection();
-
- static XtActionsRec actions[] =
- {
- {"unscale", SWUnscale},
- {"autoscale", SWAutoscale},
- {"initial-size", SWInitialSize},
- {"paste", RequestSelection},
- {"cut", GrabSelection}
- };
-
- static char translations[] =
- "\
- <Key>u: unscale()\n\
- <Key>a: autoscale()\n\
- <Key>i: initial-size()\n\
- ";
-
- ScaleClassRec scaleClassRec = {
- { /* core fields */
- /* superclass */ (WidgetClass) &simpleClassRec,
- /* class_name */ "Scale",
- /* widget_size */ sizeof(ScaleRec),
- /* class_initialize */ ClassInitialize,
- /* class_part_initialize */ NULL,
- /* class_inited */ FALSE,
- /* initialize */ Initialize,
- /* initialize_hook */ NULL,
- /* realize */ Realize,
- /* actions */ actions,
- /* num_actions */ XtNumber(actions),
- /* resources */ resources,
- /* num_resources */ XtNumber(resources),
- /* xrm_class */ NULLQUARK,
- /* compress_motion */ TRUE,
- /* compress_exposure */ XtExposeCompressMaximal|
- XtExposeGraphicsExposeMerged,
- /* compress_enterleave */ TRUE,
- /* visible_interest */ TRUE,
- /* destroy */ Destroy,
- /* resize */ Resize,
- /* expose */ Redisplay,
- /* set_values */ SetValues,
- /* set_values_hook */ NULL,
- /* set_values_almost */ XtInheritSetValuesAlmost,
- /* get_values_hook */ NULL,
- /* accept_focus */ NULL,
- /* version */ XtVersion,
- /* callback_private */ NULL,
- /* tm_table */ translations,
- /* query_geometry */ XtInheritQueryGeometry,
- /* display_accelerator */ XtInheritDisplayAccelerator,
- /* extension */ NULL
- },
- {
- /* change_sensitive */ XtInheritChangeSensitive,
- }
- };
-
- WidgetClass scaleWidgetClass = (WidgetClass) &scaleClassRec;
-
-
-
- /*
- * Private Procedures
- */
-
-
- static void ClassInitialize()
- {
- }
-
-
-
- void GetGC(sw)
- ScaleWidget sw;
- {
- XGCValues values;
-
- values.foreground = sw->scale.foreground_pixel;
- values.background = sw->core.background_pixel;
- values.function = GXcopy;
-
- sw->scale.gc = XtGetGC((Widget) sw,
- GCForeground |
- GCBackground |
- GCFunction,
- &values);
- }
-
-
-
- void Proportional();
-
- void GetInitialScaleValues(sw)
- ScaleWidget sw;
- {
- if (sw->scale.proportional) {
- sw->scale.scale_x = sw->scale.scale_y =
- ((sw->scale.aspect_ratio > 1.0) ?
- sw->scale.aspect_ratio : 1.0 / sw->scale.aspect_ratio) *
- (sw->scale.precision > 1.0 ?
- sw->scale.precision : 1.0);
- Proportional(sw); /* need to cut them down to proper values */
- }
- else
- sw->scale.scale_x = sw->scale.scale_y = 1.0;
- }
-
-
-
- void GetRectangleBuffer(sw, buffer_size)
- ScaleWidget sw;
- Cardinal buffer_size;
- /*
- * This procedure will realloc a new rectangles buffer.
- * If the new buffer size is less than nrectangles, some
- * information will be lost.
- */
- {
- if (buffer_size == 0) {
- buffer_size = DefaultBufferSize;
- XtWarning("buffer size has to be a positive number greater than zero");
- }
- sw->scale.rectangles = (XRectangle *)
- XtRealloc((char *) sw->scale.rectangles,
- buffer_size * sizeof(XRectangle));
- sw->scale.buffer_size = buffer_size;
- }
-
-
-
- /* ARGSUSED */
- static void Initialize(request, new)
- Widget request, new;
- {
- ScaleWidget new_sw = (ScaleWidget) new;
-
- new_sw->scale.table.x = (Position *) NULL;
- new_sw->scale.table.y = (Position *) NULL;
- new_sw->scale.table.width = (Dimension *) NULL;
- new_sw->scale.table.height = (Dimension *) NULL;
-
- new_sw->scale.nrectangles = 0;
- new_sw->scale.rectangles = (XRectangle *) NULL;
-
- GetRectangleBuffer(new_sw, new_sw->scale.buffer_size);
-
- GetGC(new_sw);
-
- if (new_sw->scale.image != NULL) {
- if (new_sw->core.width == 0)
- new_sw->core.width =
- new_sw->scale.image->width + 2 * new_sw->scale.internal_width;
- if (new_sw->core.height == 0)
- new_sw->core.height =
- new_sw->scale.image->height + 2 *new_sw->scale.internal_height;
- }
- else {
- if (new_sw->core.width == 0)
- new_sw->core.width = 1 + 2 * new_sw->scale.internal_width;
- if (new_sw->core.height == 0)
- new_sw->core.height = 1 + 2 * new_sw->scale.internal_height;
- new_sw->scale.image = XCreateImage(XtDisplay(new),
- DefaultVisual(XtDisplay(new),
- DefaultScreen(XtDisplay(new))),
- 1, XYBitmap, 0,
- XtCalloc(1, sizeof(char)),
- 1, 1, 8, 0);
- }
-
- if ((new_sw->scale.aspect_ratio =
- atof(new_sw->scale.aspect_ratio_str)) < 0.0) {
- new_sw->scale.aspect_ratio = 1.0;
- XtWarning("AspectRatio has to be a positive number. (forced to 1.0)");
- }
-
- if ((new_sw->scale.precision =
- atof(new_sw->scale.precision_str)) < 0.0) {
- new_sw->scale.precision = 0.001;
- XtWarning("Precision has to be a positive number. (forced to 0.001)");
- }
-
- if (new_sw->scale.scale_x_str == DefaultScaleFactor
- ||
- new_sw->scale.scale_y_str == DefaultScaleFactor)
- GetInitialScaleValues(new_sw);
- else {
- if ((new_sw->scale.scale_x =
- atof(new_sw->scale.scale_x_str)) < 0.0) {
- new_sw->scale.scale_x = 1.0;
- XtWarning("ScaleValue has to be a positive number. (forced to 1.0)");
- }
- if ((new_sw->scale.scale_y =
- atof(new_sw->scale.scale_y_str)) < 0.0) {
- new_sw->scale.scale_y = 1.0;
- XtWarning("ScaleValue has to be a positive number. (forced to 1.0)");
- }
- }
- }
-
-
-
- void BuildTable(sw)
- ScaleWidget sw;
- /*
- * This procedure builds scaling table for image in the scale struct
- * Requires image, scale_x and scale_y to be set properly
- */
- {
- Position x, y;
-
- XtFree((char *) sw->scale.table.x);
- XtFree((char *) sw->scale.table.y);
- XtFree((char *) sw->scale.table.width);
- XtFree((char *) sw->scale.table.height);
- sw->scale.table.x =
- (Position *) XtMalloc(sizeof(Position) * sw->scale.image->width);
- sw->scale.table.y =
- (Position *) XtMalloc(sizeof(Position) * sw->scale.image->height);
- sw->scale.table.width =
- (Dimension *) XtMalloc(sizeof(Dimension) * sw->scale.image->width);
- sw->scale.table.height =
- (Dimension *) XtMalloc(sizeof(Dimension) * sw->scale.image->height);
-
- /* Build the scaling table */
- for (x = 0; x < sw->scale.image->width; x++) {
- sw->scale.table.x[(int) x] = (Position) myrint(sw->scale.scale_x * x);
- sw->scale.table.width[(int) x] = (Dimension)
- myrint(sw->scale.scale_x *(x + 1)) - myrint(sw->scale.scale_x * x);
- }
- for (y = 0; y < sw->scale.image->height; y++) {
- sw->scale.table.y[(int) y] = (Position) myrint(sw->scale.scale_y * y);
- sw->scale.table.height[(int) y] = (Dimension)
- myrint(sw->scale.scale_y *(y + 1)) - myrint(sw->scale.scale_y * y);
- }
- }
-
-
-
- void FlushRectangles(sw, drawable, gc)
- ScaleWidget sw;
- Drawable drawable;
- GC gc;
- {
- XFillRectangles(XtDisplay(sw), drawable, gc,
- sw->scale.rectangles, sw->scale.nrectangles);
-
- sw->scale.nrectangles = 0;
- }
-
-
-
- void FillRectangle(sw, drawable, gc, x, y, width, height)
- ScaleWidget sw;
- Drawable drawable;
- GC gc;
- Position x, y;
- Dimension width, height;
- {
-
- if (sw->scale.nrectangles == sw->scale.buffer_size)
- FlushRectangles(sw, drawable, gc);
-
- sw->scale.rectangles[(int) sw->scale.nrectangles].x = x;
- sw->scale.rectangles[(int) sw->scale.nrectangles].y = y;
- sw->scale.rectangles[(int) sw->scale.nrectangles].width = width;
- sw->scale.rectangles[(int) sw->scale.nrectangles].height = height;
-
- ++sw->scale.nrectangles;
- }
-
-
-
- void ScaleImage(sw, drawable, img_x, img_y, dst_x, dst_y, img_width,img_height)
- ScaleWidget sw;
- Drawable drawable;
- Position img_x, img_y;
- Position dst_x, dst_y;
- Dimension img_width, img_height;
- /*
- * This procedure scales image into the specified drawable
- * It assumes scaling table was already built
- */
- {
- GC gc;
- XGCValues gcv;
- Position x, y;
- Pixel pixel;
-
- /* Clip the img coordinates */
- img_x = min(max(img_x, 0), (Position) sw->scale.image->width - 1);
- img_y = min(max(img_y, 0), (Position) sw->scale.image->height - 1);
- img_width =
- min(img_width, (Dimension)(sw->scale.image->width - (Dimension)img_x));
- img_height =
- min(img_height, (Dimension)(sw->scale.image->height - (Dimension)img_y));
-
- if (sw->scale.scale_x == 1.0 && sw->scale.scale_y == 1.0)
- XPutImage(XtDisplay(sw), drawable, sw->scale.gc, sw->scale.image,
- img_x, img_y, dst_x, dst_y,
- img_width, img_height);
- else {
- dst_x = dst_x - sw->scale.table.x[(int) img_x];
- dst_y = dst_y - sw->scale.table.y[(int) img_y];
-
- gc = XCreateGC(XtDisplay(sw), drawable, 0, NULL);
-
- gcv.function = GXcopy;
- XChangeGC(XtDisplay(sw), gc, GCFunction, &gcv);
-
- /* make sure gc knows the right background */
- gcv.background = sw->core.background_pixel;
- XChangeGC(XtDisplay(sw), gc, GCBackground, &gcv);
-
- /* Set the background of drawable. If the most frequent color
- is the background color it can speed up scaling process. */
- gcv.foreground = gcv.background;
- XChangeGC(XtDisplay(sw), gc, GCForeground, &gcv);
- XFillRectangle(XtDisplay(sw), drawable, gc,
- sw->scale.table.x[(int) img_x] + dst_x,
- sw->scale.table.y[(int) img_y] + dst_y,
- sw->scale.table.x[(int) img_x + img_width - 1] -
- sw->scale.table.x[(int) img_x],
- sw->scale.table.y[(int) img_y + img_height - 1] -
- sw->scale.table.y[(int) img_y]);
-
- if (sw->scale.image->format == XYBitmap) {
- for (x = img_x; x < img_x + (Position)img_width; x++)
- for (y = img_y; y < img_y + (Position)img_height; y++) {
- pixel = XGetPixel(sw->scale.image, x, y);
- if (pixel) /* Do not draw background */
- FillRectangle(sw, drawable, sw->scale.gc,
- sw->scale.table.x[(int) x] + dst_x,
- sw->scale.table.y[(int) y] + dst_y,
- sw->scale.table.width[(int) x],
- sw->scale.table.height[(int) y]);
- }
- FlushRectangles(sw, drawable, sw->scale.gc);
- }
- else {
- for (x = img_x; x < img_x + (Position)img_width; x++)
- for (y = img_y; y < img_y + (Position)img_height; y++) {
- pixel = XGetPixel(sw->scale.image, x, y);
- if (pixel != gcv.background) { /* Do not draw background */
- if (gcv.foreground != pixel) { /* Change fg to pixel */
- gcv.foreground = pixel;
- XChangeGC(XtDisplay(sw), gc, GCForeground, &gcv);
- }
- XFillRectangle(XtDisplay(sw), drawable, gc,
- sw->scale.table.x[(int) x] + dst_x,
- sw->scale.table.y[(int) y] + dst_y,
- sw->scale.table.width[(int) x],
- sw->scale.table.height[(int) y]);
- }
- }
- }
- XFreeGC(XtDisplay(sw), gc);
- }
- }
-
-
-
- int FindPixel(sw, x, y, img_x, img_y, img_pixel)
- ScaleWidget sw;
- Position x, y; /* (x,y) == (0,0) where image starts in sw window*/
- Position *img_x, *img_y;
- Pixel *img_pixel;
- {
- if (*img_x < 0 || *img_x >= sw->scale.image->width
- ||
- *img_y < 0 || *img_y >= sw->scale.image->height)
- return (-1);
-
- if (sw->scale.table.x[(int) *img_x] >= x) {
- --*img_x;
- return FindPixel(sw, x, y, img_x, img_y, img_pixel);
- }
- if (sw->scale.table.x[(int) *img_x] +
- (Position)sw->scale.table.width[(int) *img_x] < x) {
- ++*img_x;
- return FindPixel(sw, x, y, img_x, img_y, img_pixel);
- }
- if (sw->scale.table.y[(int) *img_y] >= y) {
- --*img_y;
- return FindPixel(sw, x, y, img_x, img_y, img_pixel);
- }
- if (sw->scale.table.y[(int) *img_y] +
- (Position)sw->scale.table.height[(int) *img_y] < y) {
- ++*img_y;
- return FindPixel(sw, x, y, img_x, img_y, img_pixel);
- }
-
- *img_pixel = XGetPixel(sw->scale.image, *img_x, *img_y);
-
- return (0);
- }
-
-
-
- int SWGetImagePixel(w, x, y, img_x, img_y, img_pixel)
- Widget w;
- Position x, y;
- Position *img_x, *img_y;
- Pixel *img_pixel;
- {
- ScaleWidget sw = (ScaleWidget) w;
-
- x -= sw->scale.x;
- y -= sw->scale.y;
-
- *img_x = (Position) floor(x / sw->scale.scale_x);
- *img_y = (Position) floor(y / sw->scale.scale_y);
-
- return FindPixel(sw, x, y, img_x, img_y, img_pixel);
- }
-
-
-
- /* ARGSUSED */
- static void Redisplay(w, event, region)
- Widget w;
- XEvent *event;
- Region region;
- {
- ScaleWidget sw = (ScaleWidget) w;
- Position x, y, img_x, img_y;
- Dimension width, height;
-
- if (event->type == Expose) {
-
- if (event->xexpose.x < sw->scale.x) {
- x = 0;
- width = event->xexpose.width -
- (sw->scale.x - event->xexpose.x);
- }
- else {
- x = event->xexpose.x - sw->scale.x;
- width = event->xexpose.width;
- }
-
- if (event->xexpose.y < sw->scale.y) {
- y = 0;
- height = event->xexpose.height -
- (sw->scale.y - event->xexpose.y);
- }
- else {
- y = event->xexpose.y - sw->scale.y;
- height = event->xexpose.height;
- }
-
- img_x = min(max((Position) floor((float) x
- / (float) sw->scale.scale_x), 0),
- (Position) sw->scale.image->width - 1);
-
- img_y = min(max((Position) floor((float) y
- / (float) sw->scale.scale_y), 0),
- (Position) sw->scale.image->height - 1);
-
- if (sw->core.visible) {
- ScaleImage(sw, XtWindow(w),
- img_x, img_y,
- sw->scale.x + sw->scale.table.x[(int) img_x],
- sw->scale.y + sw->scale.table.y[(int) img_y],
- (Dimension) ceil((float) width
- / sw->scale.scale_x) + 1,
- (Dimension) ceil((float) height
- / sw->scale.scale_y) + 1);
- }
- }
- }
-
-
-
- void TryResize(sw)
- ScaleWidget sw;
- {
- Dimension width, height;
- XtGeometryResult result;
-
- width = (Dimension)
- floor(sw->scale.image->width * sw->scale.scale_x)
- + 2 * sw->scale.internal_width;
- height = (Dimension)
- floor(sw->scale.image->height * sw->scale.scale_y)
- + 2 * sw->scale.internal_height;
-
- while ((result =
- /* SUPPRESS 530 */XtMakeResizeRequest((Widget)sw,width,height,&width,&height))
- == XtGeometryAlmost);
-
- if (result != XtGeometryNo) {
- sw->core.width = width;
- sw->core.height = height;
- }
- }
-
-
-
- void Precision(sw)
- ScaleWidget sw;
- {
- if (sw->scale.scale_x != 1.0)
- sw->scale.scale_x = floor(sw->scale.scale_x / sw->scale.precision)
- * sw->scale.precision;
-
- if (sw->scale.scale_y != 1.0)
- sw->scale.scale_y = floor(sw->scale.scale_y / sw->scale.precision)
- * sw->scale.precision;
- }
-
-
-
- void Proportional(sw)
- ScaleWidget sw;
- {
- float scale_x, scale_y;
-
- scale_x = sw->scale.scale_y / sw->scale.aspect_ratio;
- scale_y = sw->scale.scale_x * sw->scale.aspect_ratio;
-
- if (scale_x <= sw->scale.scale_x && scale_y <= sw->scale.scale_y) {
- if (scale_x > scale_y)
- sw->scale.scale_x = scale_x;
- else
- sw->scale.scale_y = scale_y;
- }
- else if (scale_x <= sw->scale.scale_x)
- sw->scale.scale_x = scale_x;
- else if (scale_y <= sw->scale.scale_y)
- sw->scale.scale_y = scale_y;
- else {
- float x_ratio, y_ratio;
-
- x_ratio = scale_x / sw->scale.scale_x;
- y_ratio = scale_y / sw->scale.scale_y;
-
- if (x_ratio < y_ratio)
- sw->scale.scale_y /= x_ratio;
- else
- sw->scale.scale_x /= y_ratio;
- }
-
- if (fabs(sw->scale.scale_x / sw->scale.scale_y * sw->scale.aspect_ratio
- - 1.0) > sw->scale.precision)
- XtWarning("can not preserve aspect ratio");
- }
-
-
-
- void GetScaledSize(sw)
- ScaleWidget sw;
- {
- sw->scale.width = (Dimension)
- max(myrint(sw->scale.scale_x * sw->scale.image->width), 1);
- sw->scale.height = (Dimension)
- max(myrint(sw->scale.scale_y * sw->scale.image->height), 1);
- }
-
-
-
- void GetScaleValues(sw)
- ScaleWidget sw;
- {
- /*
- * Make sure to subtract internal width and height.
- */
-
- sw->scale.scale_x =
- (float) max((int)(sw->core.width - 2 * sw->scale.internal_width), 1)
- / (float) sw->scale.image->width;
-
- sw->scale.scale_y =
- (float) max((int)(sw->core.height - 2 * sw->scale.internal_height), 1)
- / (float) sw->scale.image->height;
- }
-
-
-
- void Unscale(sw)
- ScaleWidget sw;
- {
- sw->scale.scale_x = sw->scale.scale_y = 1.0;
-
- GetScaledSize(sw);
-
- BuildTable(sw);
- }
-
-
-
- void Autoscale(sw)
- ScaleWidget sw;
- {
- GetScaleValues(sw);
-
- if (sw->scale.proportional) Proportional(sw);
-
- Precision(sw);
-
- GetScaledSize(sw);
-
- BuildTable(sw);
- }
-
-
-
- void PositionImage(sw)
- ScaleWidget sw;
- {
- /*
- * Set as if for ForgegGravity (that is center the image)
- */
- sw->scale.x = (Position)
- (sw->core.width - sw->scale.width) / 2;
- sw->scale.y = (Position)
- (sw->core.height - sw->scale.height) / 2;
-
- /*****
- if (sw->scale.gravity & WestGravity) {
- }
- if (sw->scale.gravity & EastGravity) {
- }
- if (sw->scale.gravity & NorthGravity) {
- }
- if (sw->scale.gravity & SouthGravity) {
- }
- *****/
- }
-
-
-
- static void Resize(w)
- Widget w;
- {
- ScaleWidget sw = (ScaleWidget) w;
-
- if (sw->scale.autoscale) Autoscale(sw);
-
- PositionImage(sw);
- }
-
-
-
- static void Realize(wid, vmask, attr)
- Widget wid;
- Mask *vmask;
- XSetWindowAttributes *attr;
- {
- ScaleWidget sw = (ScaleWidget) wid;
- XtCreateWindow(wid, (unsigned int) InputOutput,
- (Visual *) sw->scale.visual, *vmask, attr);
- }
-
-
-
- static void Destroy(w)
- Widget w;
- {
- ScaleWidget sw = (ScaleWidget) w;
-
- XtFree((char *) sw->scale.table.x);
- XtFree((char *) sw->scale.table.y);
- XtFree((char *) sw->scale.table.width);
- XtFree((char *) sw->scale.table.height);
-
- XtFree((char *) sw->scale.rectangles);
-
- XtReleaseGC(w, sw->scale.gc);
-
- XDestroyImage(sw->scale.image);
- }
-
-
-
- /* ARGSUSED */
- static Boolean SetValues(current, request, new, args, num_args)
- Widget current, request, new;
- ArgList args;
- Cardinal *num_args;
- {
- ScaleWidget cur_sw = (ScaleWidget) current;
- /* ScaleWidget req_sw = (ScaleWidget) request; */
- ScaleWidget new_sw = (ScaleWidget) new;
- Boolean redisplay = False;
- int i;
-
- for (i = 0; i < *num_args; i++) {
- if (streq(XtNbackground, args[i].name)) {
- XSetBackground(XtDisplay(new), new_sw->scale.gc,
- new_sw->core.background_pixel);
- }
- if (streq(XtNforeground, args[i].name)) {
- XSetForeground(XtDisplay(new), new_sw->scale.gc,
- new_sw->scale.foreground_pixel);
- }
- if (streq(XtNimage, args[i].name)) {
- XDestroyImage(cur_sw->scale.image);
- if (new_sw->scale.image == NULL)
- new_sw->scale.image = XCreateImage(XtDisplay(new),
- DefaultVisual(XtDisplay(new),
- DefaultScreen(XtDisplay(new))),
- 1, XYBitmap, 0,
- XtCalloc(1, sizeof(char)),
- 1, 1, 8, 0);
- else
- new_sw->scale.image =
- XSubImage(new_sw->scale.image,
- 0, 0,
- new_sw->scale.image->width,
- new_sw->scale.image->height);
-
- if (new_sw->scale.resize)
- TryResize(new_sw);
- if (new_sw->scale.autoscale)
- Autoscale(new_sw);
- else {
- GetScaledSize(new_sw);
- BuildTable(new_sw);
- }
- PositionImage(new_sw);
- redisplay = True;
- }
-
- if (streq(XtNuserData, args[i].name))
- new_sw->scale.userData = (XtPointer)args[i].value;
-
- if (streq(XtNbufferSize, args[i].name)) {
- if (new_sw->scale.buffer_size != cur_sw->scale.buffer_size) {
- GetRectangleBuffer(new_sw, new_sw->scale.buffer_size);
- }
- }
-
- if (streq(XtNaspectRatio, args[i].name)) {
- if ((new_sw->scale.aspect_ratio =
- atof(new_sw->scale.aspect_ratio_str)) < 0.0) {
- new_sw->scale.aspect_ratio = cur_sw->scale.aspect_ratio;
- XtWarning("AspectRatio has to be a positive number.");
- }
- else if (new_sw->scale.aspect_ratio != cur_sw->scale.aspect_ratio){
- if (new_sw->scale.proportional) {
- Proportional(new_sw);
- Precision(new_sw);
- GetScaledSize(new_sw);
- BuildTable(new_sw);
- PositionImage(new_sw);
- redisplay = True;
- }
- }
- }
-
- if (streq(XtNproportional, args[i].name)) {
- if (new_sw->scale.proportional != cur_sw->scale.proportional) {
- if (new_sw->scale.proportional) Proportional(new_sw);
- Precision(new_sw);
- GetScaledSize(new_sw);
- BuildTable(new_sw);
- PositionImage(new_sw);
- redisplay = True;
- }
- }
-
- if (streq(XtNscaleX, args[i].name)
- ||
- streq(XtNscaleY, args[i].name)) {
- if (new_sw->scale.scale_x_str == DefaultScaleFactor
- ||
- new_sw->scale.scale_y_str == DefaultScaleFactor)
- GetInitialScaleValues(new_sw);
- else {
- if ((new_sw->scale.scale_x =
- atof(new_sw->scale.scale_x_str)) < 0.0) {
- new_sw->scale.scale_x = cur_sw->scale.scale_x;
- XtWarning("ScaleValue has to be a positive number.");
- }
- if ((new_sw->scale.scale_y =
- atof(new_sw->scale.scale_y_str)) < 0.0) {
- new_sw->scale.scale_y = cur_sw->scale.scale_y;
- XtWarning("ScaleValue has to be a positive number.");
- }
- }
- if (new_sw->scale.scale_x != cur_sw->scale.scale_x
- ||
- new_sw->scale.scale_y != cur_sw->scale.scale_y) {
-
- /*?*?*?*?*?*?*?*?*?*?*?*?*?*?**?*?*?*?*?*?*?*?*?***?*/
- fprintf(stderr, "================>>%f %f\n",
- new_sw->scale.scale_x, new_sw->scale.scale_y);
-
- if (new_sw->scale.proportional) Proportional(new_sw);
- Precision(new_sw);
- if (new_sw->scale.resize)
- TryResize(new_sw);
- GetScaledSize(new_sw);
- BuildTable(new_sw);
- PositionImage(new_sw);
- redisplay = True;
- }
- }
-
- if (streq(XtNprecision, args[i].name)) {
- if ((new_sw->scale.precision =
- atof(new_sw->scale.precision_str)) < 0.0) {
- new_sw->scale.precision = cur_sw->scale.precision;
- XtWarning("Precision has to be a positive number.");
- }
- if (new_sw->scale.precision != cur_sw->scale.precision) {
- if (new_sw->scale.proportional) Proportional(new_sw);
- Precision(new_sw);
- GetScaledSize(new_sw);
- BuildTable(new_sw);
- PositionImage(new_sw);
- redisplay = True;
- }
- }
- }
- return(redisplay);
- }
-
-
-
- void SWUnscale(w)
- Widget w;
- {
- ScaleWidget sw = (ScaleWidget) w;
-
- Unscale(sw);
- PositionImage(sw);
- XClearArea(XtDisplay(w), XtWindow(w), 0, 0, 0, 0, True);
- }
-
-
-
- void SWAutoscale(w)
- Widget w;
- {
- ScaleWidget sw = (ScaleWidget) w;
-
- Autoscale(sw);
- PositionImage(sw);
- XClearArea(XtDisplay(w), XtWindow(w), 0, 0, 0, 0, True);
- }
-
-
-
- void SWInitialSize(w)
- Widget w;
- {
- ScaleWidget sw = (ScaleWidget) w;
-
- GetInitialScaleValues(sw);
-
- if (sw->scale.proportional) Proportional(sw);
- Precision(sw);
- if (sw->scale.resize)
- TryResize(sw);
- GetScaledSize(sw);
- BuildTable(sw);
- PositionImage(sw);
- XClearArea(XtDisplay(w), XtWindow(w), 0, 0, 0, 0, True);
- }
-
-
-
- void SWSetImage(w, image)
- Widget w;
- XImage *image;
- {
- int n;
- Arg wargs[2];
-
- n = 0;
- XtSetArg(wargs[n], XtNimage, (XtArgVal) image); n++;
- XtSetValues(w, wargs, n);
- }
-
-
-
- extern void SWRequestSelection();
-
- void RequestSelection(w, event)
- Widget w;
- XEvent *event;
- {
- SWRequestSelection(w, event->xbutton.time);
- }
-
-
-
- extern void SWGrabSelection();
-
- void GrabSelection(w, event)
- Widget w;
- XEvent *event;
- {
- SWGrabSelection(w, event->xbutton.time);
- }
-
-
-
- Pixmap SWGetPixmap(w)
- Widget w;
- {
- ScaleWidget sw = (ScaleWidget) w;
- Pixmap pixmap;
-
- pixmap = XCreatePixmap(XtDisplay(w), XtWindow(w),
- sw->scale.width,
- sw->scale.height,
- sw->scale.image->depth);
- ScaleImage(sw, pixmap,
- 0, 0, 0, 0,
- (Dimension) sw->scale.image->width,
- (Dimension) sw->scale.image->height);
-
- return(pixmap);
- }
-