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cdesktopenv/cde/examples/motif/draganddrop/DNDDraw.c

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/*
* CDE - Common Desktop Environment
*
* Copyright (c) 1993-2012, The Open Group. All rights reserved.
*
* These libraries and programs are free software; you can
* redistribute them and/or modify them under the terms of the GNU
* Lesser General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* These libraries and programs are distributed in the hope that
* they will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with these librararies and programs; if not, write
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
* Floor, Boston, MA 02110-1301 USA
*/
/*
* (c) Copyright 1989, 1990, 1991, 1992, 1993 OPEN SOFTWARE FOUNDATION, INC.
* ALL RIGHTS RESERVED
*/
/*
* Motif Release 1.2.2
*/
#ifdef REV_INFO
#ifndef lint
static char rcsid[] = "$XConsortium: DNDDraw.c /main/4 1995/10/27 10:43:57 rswiston $"
#endif
#endif
/*
* (c) Copyright 1987, 1988, 1989 HEWLETT-PACKARD COMPANY */
/*
* file: DNDDraw.c
*
* File containing all the drawing routines needed to run DNDDemo
* program.
*
*/
#include "DNDDemo.h"
/* The following character arrays hold the bits for
* the source and state icons for both 32x32 and 16x16 drag icons.
* The source is a color palette icon and the state is a paint brush icon.
*/
unsigned char SOURCE_ICON_BITS[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0xaa, 0x02,
0x00, 0x50, 0x55, 0x07, 0x00, 0x28, 0x00, 0x0c, 0x00, 0x94, 0x42, 0x19,
0x00, 0xca, 0xe5, 0x33, 0x00, 0x85, 0xc6, 0x33, 0x80, 0x42, 0xe7, 0x33,
0x40, 0x81, 0xc3, 0x31, 0xa0, 0x00, 0x00, 0x38, 0x50, 0x00, 0x00, 0x1c,
0x28, 0x00, 0x00, 0x0e, 0x90, 0x02, 0x00, 0x07, 0xc8, 0x05, 0x80, 0x03,
0x90, 0x07, 0xc0, 0x01, 0x48, 0x05, 0xe0, 0x00, 0x90, 0x03, 0x70, 0x00,
0x08, 0x00, 0x30, 0x00, 0x10, 0x14, 0x30, 0x00, 0x08, 0x2a, 0x30, 0x00,
0x10, 0x34, 0x30, 0x00, 0x28, 0x2a, 0x60, 0x00, 0x50, 0x9c, 0xe2, 0x00,
0xa0, 0x40, 0xc4, 0x01, 0x40, 0x01, 0x84, 0x01, 0x80, 0x42, 0x84, 0x03,
0x00, 0x85, 0x03, 0x03, 0x00, 0x0a, 0x00, 0x03, 0x00, 0xf4, 0xff, 0x03,
0x00, 0xf8, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00};
unsigned char SOURCE_ICON_MASK[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0xff, 0x07, 0x00, 0xf8, 0xff, 0x0f,
0x00, 0xfc, 0xff, 0x1f, 0x00, 0xfe, 0xff, 0x3f, 0x00, 0xff, 0xff, 0x7f,
0x80, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x7f, 0xe0, 0xff, 0xff, 0x7f,
0xf0, 0xff, 0xff, 0x7f, 0xf8, 0xff, 0xff, 0x7f, 0xfc, 0xff, 0xff, 0x7f,
0xfc, 0xff, 0xff, 0x3f, 0xfc, 0xff, 0xff, 0x1f, 0xfc, 0xff, 0xff, 0x0f,
0xfc, 0xff, 0xff, 0x07, 0xfc, 0xff, 0xff, 0x03, 0xfc, 0xff, 0xff, 0x01,
0xfc, 0xff, 0xff, 0x00, 0xfc, 0xff, 0x7f, 0x00, 0xfc, 0xff, 0x7f, 0x00,
0xfc, 0xff, 0xff, 0x00, 0xfc, 0xff, 0xff, 0x01, 0xfc, 0xff, 0xff, 0x03,
0xf8, 0xff, 0xff, 0x03, 0xf0, 0xff, 0xff, 0x07, 0xe0, 0xff, 0xff, 0x07,
0xc0, 0xff, 0xff, 0x07, 0x80, 0xff, 0xff, 0x07, 0x00, 0xff, 0xff, 0x07,
0x00, 0xfe, 0xff, 0x07, 0x00, 0xfc, 0xff, 0x03};
unsigned char STATE_ICON_BITS[] = {
0x00, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x78, 0x00, 0x00, 0x00,
0xf8, 0x01, 0x00, 0x00, 0xf8, 0x01, 0x00, 0x00, 0xf8, 0x03, 0x00, 0x00,
0xf0, 0x03, 0x00, 0x00, 0xf0, 0x07, 0x00, 0x00, 0xc0, 0x0d, 0x00, 0x00,
0x00, 0x1b, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00,
0x00, 0xfc, 0x00, 0x00, 0x00, 0xf8, 0x01, 0x00, 0x00, 0xf0, 0x03, 0x00,
0x00, 0xe0, 0x07, 0x00, 0x00, 0xc0, 0x0f, 0x00, 0x00, 0x80, 0x1f, 0x00,
0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0xfc, 0x00,
0x00, 0x00, 0xf8, 0x01, 0x00, 0x00, 0xf0, 0x01, 0x00, 0x00, 0xe0, 0x03,
0x00, 0x00, 0xc0, 0x07, 0x00, 0x00, 0x80, 0x0f, 0x00, 0x00, 0x00, 0x1f,
0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x00, 0x38,
0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, 0xc0};
unsigned char STATE_ICON_MASK[] = {
0x3f, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x03, 0x00, 0x00,
0xfc, 0x03, 0x00, 0x00, 0xfc, 0x07, 0x00, 0x00, 0xfc, 0x07, 0x00, 0x00,
0xfc, 0x07, 0x00, 0x00, 0xf8, 0x07, 0x00, 0x00, 0xf8, 0x0f, 0x00, 0x00,
0xe0, 0x1f, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00,
0x00, 0xfc, 0x00, 0x00, 0x00, 0xf8, 0x01, 0x00, 0x00, 0xf0, 0x03, 0x00,
0x00, 0xe0, 0x07, 0x00, 0x00, 0xc0, 0x0f, 0x00, 0x00, 0x80, 0x1f, 0x00,
0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0xfe, 0x01, 0x00, 0x00, 0xfc, 0x03,
0x00, 0x00, 0xf8, 0x03, 0x00, 0x00, 0xf0, 0x07, 0x00, 0x00, 0xe0, 0x0f,
0x00, 0x00, 0xc0, 0x1f, 0x00, 0x00, 0x80, 0x3f, 0x00, 0x00, 0x00, 0x7f,
0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00, 0xfe,
0x00, 0x00, 0x00, 0xfc, 0x00, 0x00, 0x00, 0xf0};
unsigned char INVALID_ICON_BITS[] = {
0x00, 0xe0, 0x0f, 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x00, 0xff, 0xff, 0x01,
0x80, 0xff, 0xff, 0x03, 0xc0, 0x1f, 0xf0, 0x07, 0xe0, 0x07, 0xc0, 0x0f,
0xf0, 0x07, 0x00, 0x1f, 0xf8, 0x0f, 0x00, 0x3e, 0xf8, 0x1f, 0x00, 0x3c,
0xfc, 0x3f, 0x00, 0x7c, 0x3c, 0x7f, 0x00, 0x78, 0x3c, 0xfe, 0x00, 0x78,
0x1e, 0xfc, 0x01, 0xf0, 0x1e, 0xf8, 0x03, 0xf0, 0x1e, 0xf0, 0x07, 0xf0,
0x1e, 0xe0, 0x0f, 0xf0, 0x1e, 0xc0, 0x1f, 0xf0, 0x1e, 0x80, 0x3f, 0xf0,
0x1e, 0x00, 0x7f, 0xf0, 0x3c, 0x00, 0xfe, 0x78, 0x3c, 0x00, 0xfc, 0x79,
0x7c, 0x00, 0xf8, 0x7f, 0x78, 0x00, 0xf0, 0x3f, 0xf8, 0x00, 0xe0, 0x3f,
0xf0, 0x01, 0xc0, 0x1f, 0xe0, 0x07, 0xc0, 0x0f, 0xc0, 0x1f, 0xf0, 0x07,
0x80, 0xff, 0xff, 0x03, 0x00, 0xff, 0xff, 0x01, 0x00, 0xfc, 0x7f, 0x00,
0x00, 0xe0, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00};
unsigned char SMALL_SOURCE_ICON_BITS[] = {
0x80, 0x1f, 0x40, 0x60, 0x20, 0x91, 0x90, 0xaa, 0x08, 0x91, 0x08, 0x40,
0x08, 0x20, 0x08, 0x10, 0x28, 0x10, 0x78, 0x10, 0x28, 0x20, 0x08, 0x41,
0x90, 0x43, 0x20, 0x21, 0x40, 0x10, 0x80, 0x0f};
unsigned char SMALL_SOURCE_ICON_MASK[] = {
0x80, 0x1f, 0xc0, 0x7f, 0xe0, 0xff, 0xf0, 0xff, 0xf8, 0xff, 0xf8, 0x7f,
0xf8, 0x3f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x3f, 0xf8, 0x7f,
0xf0, 0x7f, 0xe0, 0x3f, 0xc0, 0x1f, 0x80, 0x0f};
unsigned char SMALL_STATE_ICON_BITS[] = {
0x0f, 0x00, 0x1e, 0x00, 0x1e, 0x00, 0x3c, 0x00, 0x50, 0x00, 0xe0, 0x00,
0xc0, 0x01, 0x80, 0x03, 0x00, 0x07, 0x00, 0x0e, 0x00, 0x1c, 0x00, 0x18,
0x00, 0x20, 0x00, 0x40, 0x00, 0x80, 0x00, 0x00};
unsigned char SMALL_STATE_ICON_MASK[] = {
0x0f, 0x00, 0x1e, 0x00, 0x1e, 0x00, 0x3c, 0x00, 0x70, 0x00, 0xe0, 0x00,
0xc0, 0x01, 0x80, 0x03, 0x00, 0x07, 0x00, 0x0e, 0x00, 0x1c, 0x00, 0x18,
0x00, 0x20, 0x00, 0x40, 0x00, 0x80, 0x00, 0x00};
unsigned char SMALL_INVALID_ICON_BITS[] = {
0xe0, 0x03, 0xf8, 0x0f, 0x1c, 0x1c, 0x1e, 0x30, 0x3e, 0x30, 0x73, 0x60,
0xe3, 0x60, 0xc3, 0x61, 0x83, 0x63, 0x03, 0x67, 0x06, 0x3e, 0x06, 0x3c,
0x1c, 0x1c, 0xf8, 0x0f, 0xe0, 0x03, 0x00, 0x00};
/* Globals variables */
AppInfo appInfo;
/* This is a string to pixel conversion function. */
Pixel
GetColor(char *colorstr)
{
XrmValue from, to;
from.size = strlen(colorstr) +1;
if (from.size < sizeof(String))
from.size = sizeof(String);
from.addr = colorstr;
to.addr = NULL;
XtConvert(topLevel, XmRString, &from, XmRPixel, &to);
if (to.addr != NULL)
return ((Pixel) *((Pixel *) to.addr));
else
return ( (XtArgVal) NULL);
}
/* This procedure is used to initalize the application information structure */
void
InitializeAppInfo(void)
{
if (!appInfo) {
appInfo = (AppInfo) XtMalloc(sizeof(AppInfoRec));
appInfo->rectGC = NULL;
appInfo->currentColor = 0;
appInfo->rectDpyTable = NULL;
appInfo->rectsAllocd = 0;
appInfo->numRects = 0;
appInfo->highlightRect = NULL;
appInfo->clearRect = NULL;
appInfo->doMove = True;
appInfo->creatingRect = True;
appInfo->operation = XmDROP_MOVE;
appInfo->maxCursorWidth = 64;
appInfo->maxCursorHeight = 64;
appInfo->rectX = 0;
appInfo->rectY = 0;
appInfo->rectX2 = 0;
appInfo->rectY2 = 0;
}
}
/* This procedure sets the color in the GC for drawing the rectangles
* in a new color.
*/
void
SetColor(Display *display, Pixel color)
{
/*
* if the GC already has a foreground of this color,
* it would be wasteful to reset the color
*/
if (color != appInfo->currentColor) {
XSetForeground(display, appInfo->rectGC, (unsigned long) color);
appInfo->currentColor = color;
}
}
/* This function draws the rectangle in the color provided */
static int
RectDraw(Display *display, Window window, RectPtr rect)
{
SetColor(display, rect->color);
XFillRectangle(display, window, appInfo->rectGC, rect->x,
rect->y, rect->width, rect->height);
}
/* This procedure draws the rectangle highlight in a specified color*/
static void
RectDrawHighlight( Widget w, RectPtr rect, Pixel color )
{
Display *display = XtDisplay(w);
Window window = XtWindow(w);
Pixel currentColor = rect->color;
XGCValues values;
values.foreground = color;
XChangeGC(display, appInfo->rectGC, GCForeground, &values);
XDrawRectangle(display, window, appInfo->rectGC,
rect->x + 1, rect->y + 1,
rect->width - HIGHLIGHT_THICKNESS,
rect->height - HIGHLIGHT_THICKNESS);
/* Return the GC to it's previous state */
values.foreground = appInfo->currentColor = currentColor;
XChangeGC(display, appInfo->rectGC, GCForeground, &values);
}
/* This procedure handles redrawing the rectangles. It draws
* them according to the order in the rectangle display table.
* The rectangles at the top of the table are drawn first.
*/
void
RedrawRectangles(Widget w)
{
Display *display = XtDisplay(w);
RectPtr rect;
Window window = XtWindow(w);
int i;
for (i = 0; i < appInfo->numRects; i++) {
rect = appInfo->rectDpyTable[i];
/* Only draw the rectangles that haven't been cleared */
if (rect != appInfo->clearRect) {
RectDraw(display, window, rect);
}
/* Draw the rectangle highlight of the highlight rectangle */
if (rect == appInfo->highlightRect) {
RectDrawHighlight(w, rect, GetColor(HIGHLIGHT_COLOR));
}
}
}
/* This procedure will clear the current rectangle and redraw any rectangles
* that were partially cleared by the rectangle that was deleted.
*/
/* ARGSUSED */
void
RectHide(Display *display, Window window, RectPtr rect)
{
Pixel background, oldColor;
Arg args[1];
/* Get the background of the drawing area. */
XtSetArg(args[0], XmNbackground, &background);
XtGetValues(drawingArea, args, 1);
/* Save the old color for restoration purposes. */
oldColor = rect->color;
/* Clear the rectangle */
rect->color = background;
RectDraw(display, window, rect);
appInfo->clearRect = rect;
/* redraw the rest of the rectangles */
RedrawRectangles(drawingArea);
/* restore the rectangle color */
rect->color = oldColor;
}
/* This procedure draws the stipple rectangle that is used in marking
* the old rectangle position during a rectangle move operation.
*/
/* ARGSUSED */
void
RectDrawStippled(Display *display, Window window, RectPtr rect)
{
register int x = rect->x;
register int y = rect->y;
register Dimension width = rect->width;
register Dimension height = rect->height;
XGCValues values;
XSegment segments[4];
/* Set the rectangle color */
values.foreground = appInfo->currentColor = rect->color;
XChangeGC(display, appInfo->rectGC, GCForeground , &values);
/* Create the segments for drawing the stippled rectangle */
segments[0].x1 = segments[2].x1 = x;
segments[0].y1 = segments[0].y2 = y;
segments[0].x2 = x + width - 1;
segments[1].x1 = segments[1].x2 = x + width - 1;
segments[1].y1 = segments[3].y1 = y;
segments[3].y2 = y + height;
segments[2].y1 = segments[2].y2 = y + height - 1;
segments[3].x1 = segments[3].x2 = x;
segments[2].x2 = x + width;
segments[1].y2 = y + height;
/* Set the line attributes and draw */
XSetLineAttributes(display, appInfo->rectGC, 1, LineOnOffDash,
CapButt, JoinMiter);
XDrawSegments (display, window, appInfo->rectGC, segments, 4);
/* restore the default line settings */
values.line_width = HIGHLIGHT_THICKNESS;
values.line_style = LineSolid;
XChangeGC(display, appInfo->rectGC, GCLineWidth | GCLineStyle, &values);
}
/* This procedure sets the highlight rectangle and
* redraws the rectangles. The expose routine will draw
* the highlight around the highlighted rectangle.
*/
/* ARGSUSED */
void
RectHighlight(Widget w, RectPtr rect)
{
if (appInfo->highlightRect != rect) {
appInfo->highlightRect = rect;
RedrawRectangles(w);
}
}
/* This procedure sets the highlight rectangle to NULL and
* redraws the rectangles. The expose routine will clear
* the highlight around the highlighted rectangle.
*/
/* ARGSUSED */
void
RectUnhighlight(Widget w)
{
if (appInfo->highlightRect) {
appInfo->highlightRect = NULL;
RedrawRectangles(w);
}
}
/* This function creates and initialized a new rectangle */
RectPtr
RectCreate(Position x, Position y, Dimension width,
Dimension height, Pixel color, Pixmap pixmap)
{
RectPtr rect;
rect = (RectPtr) XtMalloc(sizeof(RectStruct));
rect->x = x;
rect->y = y;
rect->width = width;
rect->height = height;
rect->color = color;
rect->pixmap = pixmap;
return(rect);
}
/* This procedure will move the rectangle to the end of the rectangle
* display table (effectively raising it to top of the displayed
* rectangles).
*/
static void
RectToTop(RectPtr rect)
{
int i, j;
if (rect) {
/* Get the index to the target rectangle */
for (i = 0; i < appInfo->numRects; i++) {
if (appInfo->rectDpyTable[i] == rect)
break;
}
/* Shift the other rectangles downward */
for (j = i; j < appInfo->numRects - 1; j++)
appInfo->rectDpyTable[j] = appInfo->rectDpyTable[j + 1];
/* Place the target rectangle at the end */
appInfo->rectDpyTable[j] = rect;
}
}
/* This procedure raises the rectangle to the top of the drawing area */
/* ARGSUSED */
static void
RectRaise(Widget w, RectPtr rect)
{
RectToTop(rect);
RedrawRectangles(w);
}
/* This procedure moves the rectangle the the end of the display stack,
* decrements the number of rectangles, and then frees the rectangle.
*/
void
RectFree(RectPtr rect)
{
/* if the rectangle is registered */
if (rect) {
RectToTop(rect);
appInfo->numRects--;
XtFree((char *)rect);
}
}
/* This procedure added the rectangle to the rectangle display table
* (reallocing the table if necessary).
*/
void
RectRegister(RectPtr rect, Position x, Position y)
{
appInfo->numRects++;
/* rectangles can have their x and y values reset at registration time */
rect->x = x;
rect->y = y;
/* realloc the table if it is too small */
if (appInfo->numRects > appInfo->rectsAllocd) {
/* grow geometrically */
appInfo->rectsAllocd *= 2;
appInfo->rectDpyTable = (RectPtr *)
XtRealloc((char *) appInfo->rectDpyTable,
(unsigned) (sizeof(RectPtr) *
appInfo->rectsAllocd));
}
/* Add to end of display table */
appInfo->rectDpyTable[appInfo->numRects - 1] = rect;
}
/* This function find the top most rectangle at the given x,y position */
RectPtr
RectFind(Position x, Position y)
{
RectPtr rect;
int i;
/*
* Search from the end of the rectangle display table
* to find the top most rectangle.
*/
for (i = appInfo->numRects - 1; i >= 0; i--) {
rect = appInfo->rectDpyTable[i];
if (rect->x <= x && rect->x + (int)rect->width >= x &&
rect->y <= y && rect->y + (int)rect->height >= y) {
return(rect);
}
}
/* If a rectangle is not found return NULL */
return(NULL);
}
/* This procedure sets the retangle's color */
void
RectSetColor(RectPtr rect, Display *display, Window window, Pixel color)
{
rect->color = color;
RectDraw(display, window, rect);
}
/* This function gets the retangle's color */
Pixel
RectGetColor(RectPtr rect)
{
return(rect->color);
}
/* This procedure sets the retangle's pixmap. The pixmap portion of the
* rectangle is not currently being used.
*/
/* ARGSUSED */
void
RectSetPixmap(RectPtr rect, Display *display, Window window, Pixmap pixmap)
{
rect->pixmap = pixmap; /* not currently being looked at */
RectDraw(display, window, rect);
}
/* This function gets the retangle's pixmap. The pixmap portion of the
* rectangle is not currently being used.
*/
/* ARGSUSED */
static Pixmap
RectGetPixmap(RectPtr rect)
{
return (rect->pixmap);
}
/* This procedure gets the retangle's height and width. */
/* ARGSUSED */
static void
RectGetDimensions(RectPtr rect, Dimension *width, Dimension *height)
{
*width = rect->width;
*height = rect->height;
}
/* This function creates the rectangle bitmaps for the icon. */
Pixmap
GetBitmapFromRect(Widget w, RectPtr rect, Pixel background, Pixel foreground,
Dimension *widthRtn, Dimension *heightRtn)
{
Dimension width, height, maxHeight, maxWidth;
GC fillGC;
Pixmap icon_pixmap;
Display *display = XtDisplay(w);
XGCValues values;
RectGetDimensions(rect, &width, &height);
/* Get the maximum allowable width and height allowed by the cursor */
maxWidth = appInfo->maxCursorWidth;
maxHeight = appInfo->maxCursorHeight;
/* if the dimensions aren't within the allowable dimensions resize
* then proportionally
*/
if (maxWidth < width || maxHeight < height) {
if (width > height) {
height = (Dimension)(height * maxWidth) / (Dimension)width;
width = appInfo->maxCursorWidth;
} else {
width = (Dimension)(width * maxHeight) / (Dimension)height;
height = appInfo->maxCursorHeight;
}
}
/* Create a depth 1 pixmap (bitmap) for use with the drag icon */
icon_pixmap = XCreatePixmap(display, XtWindow(w), width, height, 1);
/* create a GC for drawing into the bitmap */
fillGC = XCreateGC(display, icon_pixmap, 0, (XGCValues *)NULL);
/* fill the bitmap with 0's as a starting point */
XFillRectangle(display, icon_pixmap, fillGC, 0, 0, width, height);
/* Change GC to be able to create the rectangle with 1's on the bitmap */
values.foreground = 1;
XChangeGC(display, fillGC, GCForeground, &values);
/*
* This draw a filled rectangle. If only a outline is desired
* use the XDrawRectangle() call. Note: the outline does not
* produce very effect icon melting.
*/
XFillRectangle(display, icon_pixmap, fillGC, 0, 0, width, height);
/* Free the fill GC */
XFreeGC(display, fillGC);
*widthRtn = width;
*heightRtn = height;
return(icon_pixmap);
}
/***************************************************************************
***************************************************************************
Functions used in Drawing Outlines:
***************************************************************************
***************************************************************************/
/*
* This procedure changes the GC to do rubberband
* drawing of a rectangle frame .
*/
static void
SetXorGC(Widget w)
{
unsigned long valueMask = GCFunction | GCForeground | GCLineWidth;
XGCValues values;
Pixel bg, fg;
XtVaGetValues (w, XmNbackground, &bg, XmNforeground, &fg, NULL);
values.function = GXxor;
values.foreground = fg^bg; /* fix 5127 */
values.line_width = 1;
XChangeGC(XtDisplay(w), appInfo->rectGC, valueMask, &values);
}
/* This procedure returns the GC to it's initial state. */
static void
SetNormGC(Widget w)
{
unsigned long valueMask = GCFunction | GCLineWidth | GCForeground;
XGCValues values;
values.function = GXcopy;
values.foreground = appInfo->currentColor;
values.line_width = HIGHLIGHT_THICKNESS;
XChangeGC(XtDisplay(w), appInfo->rectGC, valueMask, &values);
}
/* This procedure returns the values of the current rectangle outline */
static void
OutlineGetDimensions(Position *x, Position *y, Dimension *width,
Dimension *height)
{
if (appInfo->rectX < appInfo->rectX2) {
*x = appInfo->rectX;
*width = appInfo->rectX2 - *x;
} else {
*x = appInfo->rectX2;
*width = appInfo->rectX - *x;
}
if (appInfo->rectY < appInfo->rectY2) {
*y = appInfo->rectY;
*height = appInfo->rectY2 - *y;
} else {
*y = appInfo->rectY2;
*height = appInfo->rectY - *y;
}
}
static void
OutlineDraw(Widget w)
{
Position x, y;
Dimension width, height;
OutlineGetDimensions(&x, &y, &width, &height);
XDrawRectangle(XtDisplay(w), XtWindow(w), appInfo->rectGC,
x, y, width, height);
}
/* This procedure sets intializes the drawing positions */
static void
OutlineSetPosition(Position x, Position y)
{
appInfo->rectX = appInfo->rectX2 = x;
appInfo->rectY = appInfo->rectY2 = y;
}
/* This procedure resets outline end position */
static void
OutlineResetPosition(Position x, Position y)
{
appInfo->rectX2 = x;
appInfo->rectY2 = y;
}
/* This action procedure begins creating a rectangle at the x,y position
* of the button event if a rectangle doesn't already exist at
* that position. Otherwise is raises the rectangle to the top
* of the drawing area.
*/
/* ARGSUSED */
void
StartRect(Widget w, XEvent *event, String *params, Cardinal *num_params)
{
Display *display = XtDisplay(w);
RectPtr rect;
Position x = event->xbutton.x;
Position y = event->xbutton.y;
rect = RectFind(x, y);
/* if there isn't a rectangle at this position, begin creating one */
if (!rect) {
appInfo->creatingRect = True;
/* set gc for drawing rubberband outline for rectangles */
SetXorGC(w);
/* set the initial outline positions */
OutlineSetPosition(x, y);
/* Draw the rectangle */
OutlineDraw(w);
}
else
RectRaise(w, rect);
}
/* This action procedure extends the drawing of the outline
* for the rectangle to be created.
*/
/* ARGSUSED */
void
ExtendRect(Widget w, XEvent *event, String *params, Cardinal *num_params)
{
if (appInfo->creatingRect) {
/* erase the old outline */
OutlineDraw(w);
/* set the new outline end positions */
OutlineResetPosition(event->xbutton.x, event->xbutton.y);
/* redraw the outline */
OutlineDraw(w);
}
}
/* This action procedure creates a rectangle depending on the
* dimensions set in the StartRect and ExtendRect action procs.
*/
/* ARGSUSED */
void
EndRect(Widget w, XEvent *event, String *params, Cardinal *num_params)
{
Position x, y;
Dimension width, height;
RectPtr rect;
if (appInfo->creatingRect) {
/* erase the last outline */
OutlineDraw(w);
/* return GC to original state */
SetNormGC(w);
/* Get the outline dimensions for creating the rectangle */
OutlineGetDimensions(&x, &y, &width, &height);
/* we don't want to create zero width or height rectangles */
if (width == 0 || height == 0){
appInfo->creatingRect = False;
return;
}
rect = RectCreate(x, y, width, height,
GetColor(RECT_START_COLOR), XmUNSPECIFIED_PIXMAP);
RectDraw(XtDisplay(w), XtWindow(w), rect);
RectRegister(rect, x, y);
appInfo->creatingRect = False;
}
}
/* The procedure assigns new translations the the given widget */
static void
SetupTranslations(Widget widget, char *new_translations)
{
XtTranslations new_table;
new_table = XtParseTranslationTable(new_translations);
XtOverrideTranslations(widget, new_table);
}
/* This procedure handles exposure events and makes a call to
* RedrawRectangles() to redraw the rectangles
* The rectangles at the top of the table are drawn first.
*/
/* ARGSUSED */
static void
HandleExpose(Widget w, XtPointer closure, XtPointer call_data)
{
RedrawRectangles(w);
}
/* This procedure sets up the drawing area */
static void
CreateDrawingArea(Widget parent)
{
static char da_translations[] =
"#replace <Btn2Down>: StartMove() \n\
<Btn1Down>: StartRect() \n\
<Btn1Motion>: ExtendRect() \n\
<Btn1Up>: EndRect() \n\
c <Key>t: XtDisplayTranslations()";
Arg args[10];
int n = 0;
XtTranslations new_table;
new_table = XtParseTranslationTable(da_translations);
/* create drawing area at the top of the form */
n = 0;
XtSetArg(args[n], XmNtranslations, new_table); n++;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNwidth, 295); n++;
XtSetArg(args[n], XmNheight, 180); n++;
XtSetArg(args[n], XmNresizePolicy, XmRESIZE_NONE); n++;
XtSetArg(args[n], XmNbackground, GetColor(DRAW_AREA_BG_COLOR)); n++;
XtSetArg(args[n], XmNforeground, GetColor(DRAW_AREA_FG_COLOR)); n++;
drawingArea = XmCreateDrawingArea(parent, "drawingArea", args, n);
XtManageChild(drawingArea);
/* add expose callback to redisplay rectangles */
XtAddCallback(drawingArea, XmNexposeCallback, HandleExpose,
(XtPointer) NULL);
}
/* This procedure sets up the area for obtaining rectangle colors */
static void
CreateColorPushButtons(Widget parent, Widget separator)
{
static char label_translations[] = "<Btn2Down>: ColorRect()";
Widget bulletinBoard;
Widget children[6];
XmString csString;
Arg args[10];
int n = 0;
/* Creating an empty compound string so the labels will have no text. */
csString = XmStringCreateSimple("");
/* Creating 6 color labels */
n = 0;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_WIDGET); n++;
XtSetArg(args[n], XmNtopWidget, separator); n++;
XtSetArg(args[n], XmNtopOffset, 2); n++;
XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNwidth, 295); n++;
bulletinBoard = XmCreateBulletinBoard(parent, "buletinBoard", args, n);
XtManageChild(bulletinBoard);
n = 0;
XtSetArg(args[n], XmNx, BOX_X_MARGIN); n++;
XtSetArg(args[n], XmNy, BOX_Y_MARGIN); n++;
XtSetArg(args[n], XmNwidth, BOX_WIDTH); n++;
XtSetArg(args[n], XmNheight, BOX_HEIGHT); n++;
XtSetArg(args[n], XmNlabelString, csString); n++;
XtSetArg(args[n], XmNbackground, GetColor(LABEL1_COLOR)); n++;
XtSetArg(args[n], XmNborderWidth, 1); n++;
children[0] = XmCreatePushButton(bulletinBoard, "PushButton1", args, n);
/* add translations for manipulating rectangles */
SetupTranslations(children[0], label_translations);
n = 0;
XtSetArg(args[n], XmNx, BOX_X_MARGIN + BOX_X_OFFSET); n++;
XtSetArg(args[n], XmNy, BOX_Y_MARGIN); n++;
XtSetArg(args[n], XmNwidth, BOX_WIDTH); n++;
XtSetArg(args[n], XmNheight, BOX_HEIGHT); n++;
XtSetArg(args[n], XmNlabelString, csString); n++;
XtSetArg(args[n], XmNbackground, GetColor(LABEL2_COLOR)); n++;
XtSetArg(args[n], XmNborderWidth, 1); n++;
children[1] = XmCreatePushButton(bulletinBoard, "PushButton1", args, n);
/* add translations for manipulating rectangles */
SetupTranslations(children[1], label_translations);
n = 0;
XtSetArg(args[n], XmNx, BOX_X_MARGIN + (2 * BOX_X_OFFSET)); n++;
XtSetArg(args[n], XmNy, BOX_Y_MARGIN); n++;
XtSetArg(args[n], XmNwidth, BOX_WIDTH); n++;
XtSetArg(args[n], XmNheight, BOX_HEIGHT); n++;
XtSetArg(args[n], XmNlabelString, csString); n++;
XtSetArg(args[n], XmNbackground, GetColor(LABEL3_COLOR)); n++;
XtSetArg(args[n], XmNborderWidth, 1); n++;
children[2] = XmCreatePushButton(bulletinBoard, "PushButton3", args, n);
/* add translations for manipulating rectangles */
SetupTranslations(children[2], label_translations);
n = 0;
XtSetArg(args[n], XmNx, BOX_X_MARGIN); n++;
XtSetArg(args[n], XmNy, BOX_Y_MARGIN + BOX_Y_OFFSET); n++;
XtSetArg(args[n], XmNwidth, BOX_WIDTH); n++;
XtSetArg(args[n], XmNheight, BOX_HEIGHT); n++;
XtSetArg(args[n], XmNlabelString, csString); n++;
XtSetArg(args[n], XmNbackground, GetColor(LABEL4_COLOR)); n++;
XtSetArg(args[n], XmNborderWidth, 1); n++;
children[3] = XmCreatePushButton(bulletinBoard, "PushButton4", args, n);
/* add translations for manipulating rectangles */
SetupTranslations(children[3], label_translations);
n = 0;
XtSetArg(args[n], XmNx, BOX_X_MARGIN + BOX_X_OFFSET); n++;
XtSetArg(args[n], XmNy, BOX_Y_MARGIN + BOX_Y_OFFSET); n++;
XtSetArg(args[n], XmNwidth, BOX_WIDTH); n++;
XtSetArg(args[n], XmNheight, BOX_HEIGHT); n++;
XtSetArg(args[n], XmNtopWidget, children[0]); n++;
XtSetArg(args[n], XmNlabelString, csString); n++;
XtSetArg(args[n], XmNbackground, GetColor(LABEL5_COLOR)); n++;
XtSetArg(args[n], XmNborderWidth, 1); n++;
children[4] = XmCreatePushButton(bulletinBoard, "PushButton5", args, n);
/* add translations for manipulating rectangles */
SetupTranslations(children[4], label_translations);
n = 0;
XtSetArg(args[n], XmNx, BOX_X_MARGIN + (2 * BOX_X_OFFSET)); n++;
XtSetArg(args[n], XmNy, BOX_Y_MARGIN + BOX_Y_OFFSET); n++;
XtSetArg(args[n], XmNwidth, BOX_WIDTH); n++;
XtSetArg(args[n], XmNheight, BOX_HEIGHT); n++;
XtSetArg(args[n], XmNlabelString, csString); n++;
XtSetArg(args[n], XmNbackground, GetColor(LABEL6_COLOR)); n++;
XtSetArg(args[n], XmNborderWidth, 1); n++;
children[5] = XmCreatePushButton(bulletinBoard, "PushButton6", args, n);
/* add translations for manipulating rectangles */
SetupTranslations(children[5], label_translations);
/* Managing the children all at once helps performance */
XtManageChildren(children, 6);
/* Freeing compound string. It is no longer necessary. */
XmStringFree(csString);
}
/* This procedure initalizes the rectangle display table */
void
InitializeRectDpyTable(void)
{
/*
* Initialize display table. This is used to maintain the
* order in which the rectangles are displayed
*/
appInfo->rectDpyTable = (RectPtr *) XtMalloc((unsigned)sizeof(RectPtr));
/* Initialize rectangle counter. This is used in reallocing the tables */
appInfo->rectsAllocd = 1;
}
/* This procedure creates the components to be displayed */
void
CreateLayout(void)
{
Widget mainWindow, form, separator;
Arg args[10];
int n = 0;
/* Create main window */
mainWindow = XmCreateMainWindow(topLevel, "mainWindow", args, n);
XtManageChild(mainWindow);
/* Create form for hold drawing area, separator, and color labels */
n = 0;
XtSetArg(args[n], XmNwidth, 300); n++;
form = XmCreateForm(mainWindow, "form", args, n);
XtManageChild(form);
/* Create area for drawing rectangles */
CreateDrawingArea(form);
/* Create separator to separate drawing area from color labels */
n = 0;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_WIDGET); n++;
XtSetArg(args[n], XmNtopWidget, drawingArea); n++;
XtSetArg(args[n], XmNtopOffset, 5); n++;
XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
XtSetArg(args[n], XmNwidth, 300); n++;
separator = XmCreateSeparatorGadget(form, "separator", args, n);
XtManageChild(separator);
/* Create color labels for changing colors of buttons */
CreateColorPushButtons(form, separator);
/* Make form the work window of the main window */
n = 0;
XtSetArg(args[n], XmNworkWindow, form); n++;
XtSetValues(mainWindow, args, n);
}
/* This procedure initializes the GC for drawing rectangles */
void
CreateRectGC(void)
{
XGCValues values;
values.line_style = LineSolid;
values.line_width = HIGHLIGHT_THICKNESS;
values.foreground = appInfo->currentColor = GetColor(RECT_START_COLOR);
appInfo->rectGC = XCreateGC(XtDisplay(topLevel), XtWindow(drawingArea),
GCLineStyle | GCLineWidth | GCForeground, &values);
}
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