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graph: different widget index's (FIXME) handled now 

widget_tell can feed data to some with another frequenzy.

When drawing a line, it has to be searched for a smaller value, what should
not get overdrawed. In order to find such a smaller value, the correct value
has to be compared to - and therefore the correct index.
This commit is contained in:
marco candrian 2008-03-10 14:30:40 +01:00 committed by Julien Danjou
parent 2e935ae1f6
commit b1b2b48a4c
1 changed files with 41 additions and 19 deletions
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60
widgets/graph.c
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@ -84,7 +84,7 @@ graph_draw(Widget *widget, DrawCtx *ctx, int offset,
int used __attribute__ ((unused)))
{
int margin_top, left_offset;
int z, y, x, tmp;
int z, y, x, tmp, cur_index, test_index;
Data *d = widget->data;
Area rectangle, pattern_area;
@ -99,7 +99,7 @@ graph_draw(Widget *widget, DrawCtx *ctx, int offset,
if(!widget->user_supplied_y)
widget->area.y = 0;
margin_top = (int) (widget->statusbar->height * (1 - d->height)) / 2 + 0.5 + widget->area.y;
margin_top = (int) ((widget->statusbar->height * (1 - d->height)) / 2 + 0.5 + widget->area.y);
left_offset = widget->area.x + d->padding_left;
if(!(d->box_height))
@ -143,26 +143,41 @@ graph_draw(Widget *widget, DrawCtx *ctx, int offset,
/* draw style = top */
for(z = 0; z < d->filltop_total; z++)
{
cur_index = *(d->filltop_index[z]);
for(y = 0; y < d->size; y++)
{
/* draw this filltop data thing [z]. But figure out the part
* what shall be visible. Therefore find the next smaller value
* on this index (draw_from) and to the point what the value
* represents */
* on this index (draw_from) - might be 0 (then draw from start) */
for(tmp = 0, x = 0; x < d->filltop_total; x++)
{
if (x == z) /* no need to compare with itself */
continue;
/* FIXME index's can be seperate now (since widget_tell) - so
* compare according offsets of the indexes.
* so use 2 seperate indexes instead of y */
if(d->filltop[x][y] > tmp && d->filltop[x][y] < d->filltop[z][y])
tmp = d->filltop[x][y];
/* current index's can be different (widget_tell might shift
* some with a different frequenzy), so calculate
* offset and compare accordingly finally */
test_index = cur_index + (*(d->filltop_index[x]) - *(d->filltop_index[z]));
if (test_index < 0)
test_index = d->size + test_index; /* text_index is minus, since < 0 */
else if(test_index >= d->size)
test_index -= d->size;
/* ... (test_)index to test for a smaller value found. */
/* if such a smaller value (to not overdraw!) is there, store into 'tmp' */
if(d->filltop[x][test_index] > tmp && d->filltop[x][test_index] < d->filltop[z][cur_index])
tmp = d->filltop[x][test_index];
}
/* reverse values and draw also accordingly */
d->draw_from[y] = d->box_height - tmp; /* i.e. no smaller value -> from top of box */
d->draw_to[y] = d->box_height - d->filltop[z][y]; /* i.e. on full graph -> 0 = bottom */
/* reverse values (because drawing from top) */
d->draw_from[cur_index] = d->box_height - tmp; /* i.e. no smaller value -> from top of box */
d->draw_to[cur_index] = d->box_height - d->filltop[z][cur_index]; /* i.e. on full graph -> 0 = bottom */
if (--cur_index < 0) /* next index to compare to other values */
cur_index = d->size - 1;
}
draw_graph(ctx, rectangle , d->draw_from, d->draw_to, *(d->filltop_index[z]), pattern_area,
&(d->filltop_color[z]), d->filltop_pcolor_center[z], d->filltop_pcolor_end[z]);
@ -189,21 +204,28 @@ graph_draw(Widget *widget, DrawCtx *ctx, int offset,
/* draw style = bottom */
for(z = 0; z < d->fillbottom_total; z++)
{
cur_index = *(d->fillbottom_index[z]);
for(y = 0; y < d->size; y++)
{
/* draw this fillbottom data thing [z]. To the value what is is,
* but from the next lower value of the other values to draw */
for(tmp = 0, x = 0; x < d->fillbottom_total; x++)
{
if (x == z)
continue;
/* FIXME index's are seperate now (since widget_tell) - so
* compare according offsets of the indexes. */
if(d->fillbottom[x][y] > tmp && d->fillbottom[x][y] < d->fillbottom[z][y])
tmp = d->fillbottom[x][y];
test_index = cur_index + (*(d->fillbottom_index[x]) - *(d->fillbottom_index[z]));
if (test_index < 0)
test_index = d->size + test_index;
else if(test_index >= d->size)
test_index -= d->size;
if(d->fillbottom[x][test_index] > tmp && d->fillbottom[x][test_index] < d->fillbottom[z][cur_index])
tmp = d->fillbottom[x][test_index];
}
d->draw_from[y] = tmp;
d->draw_from[cur_index] = tmp;
if (--cur_index < 0)
cur_index = d->size - 1;
}
draw_graph(ctx, rectangle, d->draw_from, d->fillbottom[z], *(d->fillbottom_index[z]), pattern_area,
&(d->fillbottom_color[z]), d->fillbottom_pcolor_center[z], d->fillbottom_pcolor_end[z]);