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Fixes Fl_Tile resizing for "sudden" size changes: #1102

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Enlarging and reducing wdth and height needed to be treated
seprately when the bottom right corner of the resizable would
overshoot the final size of the tile.
This commit is contained in:
Matthias Melcher 2024-11-03 18:53:18 +01:00
parent 6f6a375fca
commit 5ac570c338
1 changed files with 26 additions and 3 deletions
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29
src/Fl_Tile.cxx
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@ -585,7 +585,7 @@ void Fl_Tile::resize(int X,int Y,int W,int H) {
c->position(c->x()+dx, c->y()+dy);
}
}
// check the bounding box of all children at minimum size
// check the current bounding box of all children
init_sizes();
Fl_Rect *p = bounds();
int bbr = X, bbb = Y;
@ -605,11 +605,34 @@ void Fl_Tile::resize(int X,int Y,int W,int H) {
// perform the actual resize within a safe range
if ((dw!=0) || (dh!=0)) {
Fl_Widget *r = resizable();
// Find the target right and bottom position of the resizable child.
int trr = 0, trb = 0;
if (r) {
trr = r->x() + r->w() - dw;
trb = r->y() + r->h() - dh;
}
// Grow width and/or height of tile and adjust all children as needed.
if ((dw < 0) && (dh < 0)) {
move_intersection(bbr, bbb, bbr-dw, bbb-dh);
} else if (dw < 0) {
move_intersection(bbr, bbb, bbr-dw, bbb);
} else if (dh < 0) {
move_intersection(bbr, bbb, bbr, bbb-dh);
}
// Fix the resizable child, trying to keep its size plus all other
// widgets within their limits.
if (r) {
int rr = r->x() + r->w(), rb = r->y() + r->h();
move_intersection(rr, rb, rr-dw, rb-dh);
move_intersection(rr, rb, trr, trb);
}
// Shrink width and/or height of tile and adjust all children as needed.
if ((dw > 0) && (dh > 0)) {
move_intersection(bbr, bbb, bbr-dw, bbb-dh);
} else if (dw > 0) {
move_intersection(bbr, bbb, bbr-dw, bbb);
} else if (dh > 0) {
move_intersection(bbr, bbb, bbr, bbb-dh);
}
move_intersection(bbr, bbb, bbr-dw, bbb-dh);
init_sizes();
}
// resize the tile itself