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WM: snap to fractions when resizing areas 

Snap to fractions in 1/(2,3,4,8),

Nice for less arbitrary layouts.
This commit is contained in:
Campbell Barton 2018-07-12 16:55:16 +02:00
parent 5aff20dfd5
commit 0c41d61008
1 changed files with 23 additions and 4 deletions
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27
source/blender/editors/screen/screen_ops.c
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@ -1372,10 +1372,29 @@ static int area_snap_calc_location(
int snap_dist;
int dist;
{
/* Test the snap to middle. */
int middle = origval + (bigger - smaller) / 2;
snap_dist = abs(m_loc - middle);
final_loc = middle;
const float div_array[] = {
/* Middle. */
1.0f / 2.0f,
/* Thirds. */
1.0f / 3.0f, 2.0f / 3.0f,
/* Quaters. */
1.0f / 4.0f, 3.0f / 4.0f,
/* Eighth. */
1.0f / 8.0f, 3.0f / 8.0f,
5.0f / 8.0f, 7.0f / 8.0f,
};
/* Test the snap to the best division. */
const int axis_min = origval - smaller;
const float axis_span_fl = (float)(bigger + smaller);
int snap_dist_best = INT_MAX;
for (int i = 0; i < ARRAY_SIZE(div_array); i++) {
const int value = axis_min + round_fl_to_int(axis_span_fl * div_array[i]);
snap_dist = abs(m_loc - value);
if (snap_dist < snap_dist_best) {
snap_dist_best = snap_dist;
final_loc = value;
}
}
}
for (const ScrVert *v1 = sc->vertbase.first; v1; v1 = v1->next) {