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virtualx-engine/scene/gui/split_container.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020 
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* split_container.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "split_container.h"
#include "label.h"
#include "margin_container.h"
Control *SplitContainer::_getch(int p_idx) const {
int idx = 0;
for (int i = 0; i < get_child_count(); i++) {
Control *c = Object::cast_to<Control>(get_child(i));
if (!c || !c->is_visible_in_tree())
continue;
if (c->is_set_as_toplevel())
continue;
if (idx == p_idx)
return c;
idx++;
}
return NULL;
}
void SplitContainer::_resort() {
int axis = vertical ? 1 : 0;
Control *first = _getch(0);
Control *second = _getch(1);
// If we have only one element
if (!first || !second) {
if (first) {
fit_child_in_rect(first, Rect2(Point2(), get_size()));
} else if (second) {
fit_child_in_rect(second, Rect2(Point2(), get_size()));
}
return;
}
// Determine expanded children
bool first_expanded = (vertical ? first->get_v_size_flags() : first->get_h_size_flags()) & SIZE_EXPAND;
bool second_expanded = (vertical ? second->get_v_size_flags() : second->get_h_size_flags()) & SIZE_EXPAND;
// Determine the separation between items
Ref<Texture> g = get_icon("grabber");
int sep = get_constant("separation");
sep = (dragger_visibility != DRAGGER_HIDDEN_COLLAPSED) ? MAX(sep, vertical ? g->get_height() : g->get_width()) : 0;
// Compute the minimum size
Size2 ms_first = first->get_combined_minimum_size();
Size2 ms_second = second->get_combined_minimum_size();
// Compute the separator position without the split offset
float ratio = first->get_stretch_ratio() / (first->get_stretch_ratio() + second->get_stretch_ratio());
int no_offset_middle_sep = 0;
if (first_expanded && second_expanded) {
no_offset_middle_sep = get_size()[axis] * ratio - sep / 2;
} else if (first_expanded) {
no_offset_middle_sep = get_size()[axis] - ms_second[axis] - sep;
} else {
no_offset_middle_sep = ms_first[axis];
}
// Compute the final middle separation
middle_sep = no_offset_middle_sep;
if (!collapsed) {
int clamped_split_offset = CLAMP(split_offset, ms_first[axis] - no_offset_middle_sep, (get_size()[axis] - ms_second[axis] - sep) - no_offset_middle_sep);
middle_sep += clamped_split_offset;
if (should_clamp_split_offset) {
split_offset = clamped_split_offset;
_change_notify("split_offset");
should_clamp_split_offset = false;
}
}
if (vertical) {
fit_child_in_rect(first, Rect2(Point2(0, 0), Size2(get_size().width, middle_sep)));
int sofs = middle_sep + sep;
fit_child_in_rect(second, Rect2(Point2(0, sofs), Size2(get_size().width, get_size().height - sofs)));
} else {
fit_child_in_rect(first, Rect2(Point2(0, 0), Size2(middle_sep, get_size().height)));
int sofs = middle_sep + sep;
fit_child_in_rect(second, Rect2(Point2(sofs, 0), Size2(get_size().width - sofs, get_size().height)));
}
update();
}
Size2 SplitContainer::get_minimum_size() const {
/* Calculate MINIMUM SIZE */
Size2i minimum;
Ref<Texture> g = get_icon("grabber");
int sep = get_constant("separation");
sep = (dragger_visibility != DRAGGER_HIDDEN_COLLAPSED) ? MAX(sep, vertical ? g->get_height() : g->get_width()) : 0;
for (int i = 0; i < 2; i++) {
if (!_getch(i))
break;
if (i == 1) {
if (vertical)
minimum.height += sep;
else
minimum.width += sep;
}
Size2 ms = _getch(i)->get_combined_minimum_size();
if (vertical) {
minimum.height += ms.height;
minimum.width = MAX(minimum.width, ms.width);
} else {
minimum.width += ms.width;
minimum.height = MAX(minimum.height, ms.height);
}
}
return minimum;
}
void SplitContainer::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_SORT_CHILDREN: {
_resort();
} break;
case NOTIFICATION_MOUSE_EXIT: {
mouse_inside = false;
if (get_constant("autohide"))
update();
} break;
case NOTIFICATION_DRAW: {
if (!_getch(0) || !_getch(1))
return;
if (collapsed || (!dragging && !mouse_inside && get_constant("autohide")))
return;
if (dragger_visibility != DRAGGER_VISIBLE)
return;
int sep = dragger_visibility != DRAGGER_HIDDEN_COLLAPSED ? get_constant("separation") : 0;
Ref<Texture> tex = get_icon("grabber");
Size2 size = get_size();
if (vertical)
draw_texture(tex, Point2i((size.x - tex->get_width()) / 2, middle_sep + (sep - tex->get_height()) / 2));
else
draw_texture(tex, Point2i(middle_sep + (sep - tex->get_width()) / 2, (size.y - tex->get_height()) / 2));
} break;
case NOTIFICATION_THEME_CHANGED: {
minimum_size_changed();
} break;
}
}
void SplitContainer::_gui_input(const Ref<InputEvent> &p_event) {
if (collapsed || !_getch(0) || !_getch(1) || dragger_visibility != DRAGGER_VISIBLE)
return;
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid()) {
if (mb->get_button_index() == BUTTON_LEFT) {
if (mb->is_pressed()) {
int sep = get_constant("separation");
if (vertical) {
if (mb->get_position().y > middle_sep && mb->get_position().y < middle_sep + sep) {
dragging = true;
drag_from = mb->get_position().y;
drag_ofs = split_offset;
}
} else {
if (mb->get_position().x > middle_sep && mb->get_position().x < middle_sep + sep) {
dragging = true;
drag_from = mb->get_position().x;
drag_ofs = split_offset;
}
}
} else {
dragging = false;
}
}
}
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid()) {
bool mouse_inside_state = false;
if (vertical)
mouse_inside_state = mm->get_position().y > middle_sep && mm->get_position().y < middle_sep + get_constant("separation");
else
mouse_inside_state = mm->get_position().x > middle_sep && mm->get_position().x < middle_sep + get_constant("separation");
if (mouse_inside != mouse_inside_state) {
mouse_inside = mouse_inside_state;
if (get_constant("autohide"))
update();
}
if (!dragging)
return;
split_offset = drag_ofs + ((vertical ? mm->get_position().y : mm->get_position().x) - drag_from);
should_clamp_split_offset = true;
queue_sort();
emit_signal("dragged", get_split_offset());
}
}
Control::CursorShape SplitContainer::get_cursor_shape(const Point2 &p_pos) const {
if (dragging)
return (vertical ? CURSOR_VSIZE : CURSOR_HSIZE);
if (!collapsed && _getch(0) && _getch(1) && dragger_visibility == DRAGGER_VISIBLE) {
int sep = get_constant("separation");
if (vertical) {
if (p_pos.y > middle_sep && p_pos.y < middle_sep + sep)
return CURSOR_VSIZE;
} else {
if (p_pos.x > middle_sep && p_pos.x < middle_sep + sep)
return CURSOR_HSIZE;
}
}
return Control::get_cursor_shape(p_pos);
}
void SplitContainer::set_split_offset(int p_offset) {
if (split_offset == p_offset)
return;
split_offset = p_offset;
queue_sort();
}
int SplitContainer::get_split_offset() const {
return split_offset;
}
void SplitContainer::clamp_split_offset() {
should_clamp_split_offset = true;
queue_sort();
}
void SplitContainer::set_collapsed(bool p_collapsed) {
if (collapsed == p_collapsed)
return;
collapsed = p_collapsed;
queue_sort();
}
void SplitContainer::set_dragger_visibility(DraggerVisibility p_visibility) {
dragger_visibility = p_visibility;
queue_sort();
update();
}
SplitContainer::DraggerVisibility SplitContainer::get_dragger_visibility() const {
return dragger_visibility;
}
bool SplitContainer::is_collapsed() const {
return collapsed;
}
void SplitContainer::_bind_methods() {
ClassDB::bind_method(D_METHOD("_gui_input"), &SplitContainer::_gui_input);
ClassDB::bind_method(D_METHOD("set_split_offset", "offset"), &SplitContainer::set_split_offset);
ClassDB::bind_method(D_METHOD("get_split_offset"), &SplitContainer::get_split_offset);
ClassDB::bind_method(D_METHOD("clamp_split_offset"), &SplitContainer::clamp_split_offset);
ClassDB::bind_method(D_METHOD("set_collapsed", "collapsed"), &SplitContainer::set_collapsed);
ClassDB::bind_method(D_METHOD("is_collapsed"), &SplitContainer::is_collapsed);
ClassDB::bind_method(D_METHOD("set_dragger_visibility", "mode"), &SplitContainer::set_dragger_visibility);
ClassDB::bind_method(D_METHOD("get_dragger_visibility"), &SplitContainer::get_dragger_visibility);
ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::INT, "offset")));
ADD_PROPERTY(PropertyInfo(Variant::INT, "split_offset"), "set_split_offset", "get_split_offset");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collapsed"), "set_collapsed", "is_collapsed");
ADD_PROPERTY(PropertyInfo(Variant::INT, "dragger_visibility", PROPERTY_HINT_ENUM, "Visible,Hidden,Hidden & Collapsed"), "set_dragger_visibility", "get_dragger_visibility");
BIND_ENUM_CONSTANT(DRAGGER_VISIBLE);
BIND_ENUM_CONSTANT(DRAGGER_HIDDEN);
BIND_ENUM_CONSTANT(DRAGGER_HIDDEN_COLLAPSED);
}
SplitContainer::SplitContainer(bool p_vertical) {
mouse_inside = false;
split_offset = 0;
should_clamp_split_offset = false;
middle_sep = 0;
vertical = p_vertical;
dragging = false;
collapsed = false;
dragger_visibility = DRAGGER_VISIBLE;
}
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