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Make anchors snap to each other

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This commit is contained in:
Gilles Roudiere 2017-08-02 19:24:05 +02:00
parent b73613e1eb
commit f5ff7e9fa0
2 changed files with 31 additions and 26 deletions
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55
editor/plugins/canvas_item_editor_plugin.cpp
View File

@ -775,25 +775,30 @@ CanvasItemEditor::DragType CanvasItemEditor::_get_resize_handle_drag_type(const
return DRAG_NONE;
}
float CanvasItemEditor::_anchor_snap(const float anchor, bool *snapped) {
float result = anchor;
if (snapped)
*snapped = false;
float CanvasItemEditor::_anchor_snap(float p_anchor, bool *p_snapped, float p_opposite_anchor) {
bool snapped = false;
float dist, dist_min = 0.0;
float radius = 0.05 / zoom;
if (fabs(result - ANCHOR_BEGIN) < radius) {
result = ANCHOR_BEGIN;
if (snapped)
*snapped = true;
} else if (fabs(result - ANCHOR_CENTER) < radius) {
result = ANCHOR_CENTER;
if (snapped)
*snapped = true;
} else if (fabs(result - ANCHOR_END) < radius) {
result = ANCHOR_END;
if (snapped)
*snapped = true;
float basic_anchors[3] = { ANCHOR_BEGIN, ANCHOR_CENTER, ANCHOR_END };
for (int i = 0; i < 3; i++) {
if ((dist = fabs(p_anchor - basic_anchors[i])) < radius) {
if (!snapped || dist <= dist_min) {
p_anchor = basic_anchors[i];
dist_min = dist;
snapped = true;
}
}
}
return result;
if (p_opposite_anchor >= 0 && (dist = fabs(p_anchor - p_opposite_anchor)) < radius) {
if (!snapped || dist <= dist_min) {
p_anchor = p_opposite_anchor;
dist_min = dist;
snapped = true;
}
}
if (p_snapped)
*p_snapped = snapped;
return p_anchor;
}
Vector2 CanvasItemEditor::_anchor_to_position(Control *p_control, Vector2 anchor) {
@ -1590,23 +1595,23 @@ void CanvasItemEditor::_viewport_gui_input(const Ref<InputEvent> &p_event) {
switch (drag) {
case DRAG_ANCHOR_TOP_LEFT:
control->set_anchor(MARGIN_LEFT, _anchor_snap(anchor.x));
control->set_anchor(MARGIN_TOP, _anchor_snap(anchor.y));
control->set_anchor(MARGIN_LEFT, _anchor_snap(anchor.x, NULL, control->get_anchor(MARGIN_RIGHT)));
control->set_anchor(MARGIN_TOP, _anchor_snap(anchor.y, NULL, control->get_anchor(MARGIN_BOTTOM)));
continue;
break;
case DRAG_ANCHOR_TOP_RIGHT:
control->set_anchor(MARGIN_RIGHT, _anchor_snap(anchor.x));
control->set_anchor(MARGIN_TOP, _anchor_snap(anchor.y));
control->set_anchor(MARGIN_RIGHT, _anchor_snap(anchor.x, NULL, control->get_anchor(MARGIN_LEFT)));
control->set_anchor(MARGIN_TOP, _anchor_snap(anchor.y, NULL, control->get_anchor(MARGIN_BOTTOM)));
continue;
break;
case DRAG_ANCHOR_BOTTOM_RIGHT:
control->set_anchor(MARGIN_RIGHT, _anchor_snap(anchor.x));
control->set_anchor(MARGIN_BOTTOM, _anchor_snap(anchor.y));
control->set_anchor(MARGIN_RIGHT, _anchor_snap(anchor.x, NULL, control->get_anchor(MARGIN_LEFT)));
control->set_anchor(MARGIN_BOTTOM, _anchor_snap(anchor.y, NULL, control->get_anchor(MARGIN_TOP)));
continue;
break;
case DRAG_ANCHOR_BOTTOM_LEFT:
control->set_anchor(MARGIN_LEFT, _anchor_snap(anchor.x));
control->set_anchor(MARGIN_BOTTOM, _anchor_snap(anchor.y));
control->set_anchor(MARGIN_LEFT, _anchor_snap(anchor.x, NULL, control->get_anchor(MARGIN_RIGHT)));
control->set_anchor(MARGIN_BOTTOM, _anchor_snap(anchor.y, NULL, control->get_anchor(MARGIN_TOP)));
continue;
break;
}

2
editor/plugins/canvas_item_editor_plugin.h
View File

@ -334,7 +334,7 @@ class CanvasItemEditor : public VBoxContainer {
void _prepare_drag(const Point2 &p_click_pos);
DragType _get_anchor_handle_drag_type(const Point2 &p_click, Vector2 &r_point);
float _anchor_snap(const float anchor, bool *snapped = NULL);
float _anchor_snap(float anchor, bool *snapped = NULL, float p_opposite_anchor = -1);
Vector2 _anchor_to_position(Control *p_control, Vector2 anchor);
Vector2 _position_to_anchor(Control *p_control, Vector2 position);