godot/scene/gui/split_container.cpp
2020-03-26 15:49:42 +01:00

372 lines
11 KiB
C++

/*************************************************************************/
/* 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<Texture2D> g = get_theme_icon("grabber");
int sep = get_theme_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<Texture2D> g = get_theme_icon("grabber");
int sep = get_theme_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_theme_constant("autohide"))
update();
} break;
case NOTIFICATION_DRAW: {
if (!_getch(0) || !_getch(1))
return;
if (collapsed || (!dragging && !mouse_inside && get_theme_constant("autohide")))
return;
if (dragger_visibility != DRAGGER_VISIBLE)
return;
int sep = dragger_visibility != DRAGGER_HIDDEN_COLLAPSED ? get_theme_constant("separation") : 0;
Ref<Texture2D> tex = get_theme_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_theme_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_theme_constant("separation");
else
mouse_inside_state = mm->get_position().x > middle_sep && mm->get_position().x < middle_sep + get_theme_constant("separation");
if (mouse_inside != mouse_inside_state) {
mouse_inside = mouse_inside_state;
if (get_theme_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_VSPLIT : CURSOR_HSPLIT);
if (!collapsed && _getch(0) && _getch(1) && dragger_visibility == DRAGGER_VISIBLE) {
int sep = get_theme_constant("separation");
if (vertical) {
if (p_pos.y > middle_sep && p_pos.y < middle_sep + sep)
return CURSOR_VSPLIT;
} else {
if (p_pos.x > middle_sep && p_pos.x < middle_sep + sep)
return CURSOR_HSPLIT;
}
}
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;
}