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Fix: smooth-scrolling large distances didn't got smoothly in one direction (#11861)

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Patric Stout 2024-01-21 21:52:44 +01:00 committed by GitHub
parent c7d5cedc7b
commit 1985e7415b
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GPG Key ID: B5690EEEBB952194
1 changed files with 14 additions and 3 deletions
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17
src/viewport.cpp
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@ -1894,9 +1894,20 @@ void UpdateViewportPosition(Window *w)
if (delta_x != 0 || delta_y != 0) {
if (_settings_client.gui.smooth_scroll) {
int max_scroll = Map::ScaleBySize1D(512 * ZOOM_LVL_BASE);
/* Not at our desired position yet... */
w->viewport->scrollpos_x += Clamp(DivAwayFromZero(delta_x, 4), -max_scroll, max_scroll);
w->viewport->scrollpos_y += Clamp(DivAwayFromZero(delta_y, 4), -max_scroll, max_scroll);
int delta_x_clamped;
int delta_y_clamped;
if (abs(delta_x) > abs(delta_y)) {
delta_x_clamped = Clamp(DivAwayFromZero(delta_x, 4), -max_scroll, max_scroll);
delta_y_clamped = delta_y * delta_x_clamped / delta_x;
} else {
delta_y_clamped = Clamp(DivAwayFromZero(delta_y, 4), -max_scroll, max_scroll);
delta_x_clamped = delta_x * delta_y_clamped / delta_y;
}
w->viewport->scrollpos_x += delta_x_clamped;
w->viewport->scrollpos_y += delta_y_clamped;
} else {
w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;