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start adding actual color handl;ing code

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git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@918 57a11ea4-9604-0410-9ed3-97b8803252fd
This commit is contained in:
Linas Vepstas 1998-07-26 06:47:37 +00:00
parent 4339e2a921
commit 7420a8bd6b
2 changed files with 99 additions and 1 deletions
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94
src/register/table-motif.c
View File

@ -469,6 +469,46 @@ traverseCB (Widget mw, XtPointer cd, XtPointer cb)
/* ==================================================== */
static void
SetupColorTable (Table *table)
{
Display * dpy;
Window win;
XWindowAttributes wattr;
Colormap cmap;
XColor * colors;
int i, ncolors;
/* get the number of colors in our colormap */
dpy = XtDisplay (table->table_widget);
win = XtWindow (table->table_widget);
XGetWindowAttributes (dpy, win, &wattr);
ncolors = wattr.visual->map_entries;
cmap = wattr.colormap;
table->ncolors = ncolors;
/* If the class is TrueColor, then there is no colormap.
* Punt for now.
*/
if (TrueColor == wattr.visual->class) return;
/* if ncolors is greater than 16K, then we probably
* have a true-color display, and don't have a colormap.
* Punt. Hack Alert
*/
if (16384 < ncolors) return;
/* get the color values */
/* hack alert -- remember to free this memory somewhere. */
colors = (XColor *) malloc ( ncolors * sizeof (XColor));
table->colors = colors;
for (i=0; i<ncolors; i++) { colors[i].pixel = i; }
XQueryColors (dpy, cmap, colors, ncolors);
}
/* ==================================================== */
Widget
xaccCreateTable (Table *table, Widget parent, char * name)
{
@ -566,6 +606,55 @@ xaccCreateTable (Table *table, Widget parent, char * name)
/* ==================================================== */
static Pixel
GetColormapIndex (Table *table, int argb)
{
XColor *colors = table->colors;
int ncolors = table->ncolors;
unsigned short r,g,b;
int i;
unsigned int metric;
Pixel idx = 0;
/* if there's no colormap, then assume True or Direct Color */
/* hack alert -- will the pixel format be simple argb ??? */
if (0x0 == colors) return argb;
r = (argb & 0xff0000) >> 8;
g = argb & 0xff00;
b = (argb & 0xff) << 8;
/* use a manhatten metric to find the closest color */
metric = 0xffffffff;
for (i=0; i<ncolors; i++)
{
int pr, pg, pb;
unsigned int m;
pr = r - colors[i].red;
pg = g - colors[i].green;
pb = b - colors[i].blue;
if (0 > pr) pr = -pr;
if (0 > pg) pg = -pg;
if (0 > pb) pb = -pb;
m = pr + pg + pb;
if (m < metric) {
metric = m;
idx = colors[i].pixel;
}
}
/*
* printf ("Info: GetColormapIndex(): \n"
* "\tRequested rgb=0x%x r=0x%x g=0x%x b=0x%x \n"
* "\tfound idx=%d 0x%x 0x%x 0x%x\n", argb, r, g, b, idx,
* colors[idx].red, colors[idx].green, colors[idx].blue);
*/
return idx;
}
/* ==================================================== */
void
xaccRefreshTableGUI (Table * table)
{
@ -580,6 +669,11 @@ table->entries[i][3]);
XmNcells, table->entries,
/* XmNcellBackgrounds, table->?? */
NULL);
SetupColorTable (table);
{Pixel p=GetColormapIndex (table,0x99ee33);
printf ("its %d\n", p); }
}
/* ================== end of file ======================= */

6
src/register/table-motif.h
View File

@ -52,12 +52,16 @@
#define TABLE_PRIVATE_DATA \
/* Motif specific private data */ \
Widget table_widget; /* the XbaeMatrix */ \
Widget next_tab_group; /* where to traverse in the end */
Widget next_tab_group; /* where to traverse in the end */ \
unsigned int ncolors; /* number of colors in colormap */ \
XColor *colors; /* colormap entries */
#define TABLE_PRIVATE_DATA_INIT(table) { \
table->table_widget = 0; \
table->next_tab_group = 0; \
table->ncolors = 0; \
table->colors = 0x0; \
}
/* hack alert -- shouldn't destroy get rid of the widget? */