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https://github.com/godotengine/godot.git
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364 lines
12 KiB
C++
364 lines
12 KiB
C++
/*************************************************************************/
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/* split_container.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "split_container.h"
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#include "label.h"
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#include "margin_container.h"
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Control *SplitContainer::_getch(int p_idx) const {
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int idx = 0;
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for (int i = 0; i < get_child_count(); i++) {
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Control *c = Object::cast_to<Control>(get_child(i));
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if (!c || !c->is_visible()) {
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continue;
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}
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if (c->is_set_as_top_level()) {
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continue;
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}
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if (idx == p_idx) {
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return c;
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}
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idx++;
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}
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return nullptr;
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}
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void SplitContainer::_resort() {
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int axis = vertical ? 1 : 0;
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Control *first = _getch(0);
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Control *second = _getch(1);
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// If we have only one element
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if (!first || !second) {
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if (first) {
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fit_child_in_rect(first, Rect2(Point2(), get_size()));
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} else if (second) {
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fit_child_in_rect(second, Rect2(Point2(), get_size()));
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}
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return;
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}
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// Determine expanded children
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bool first_expanded = (vertical ? first->get_v_size_flags() : first->get_h_size_flags()) & SIZE_EXPAND;
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bool second_expanded = (vertical ? second->get_v_size_flags() : second->get_h_size_flags()) & SIZE_EXPAND;
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// Determine the separation between items
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Ref<Texture2D> g = get_theme_icon(SNAME("grabber"));
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int sep = get_theme_constant(SNAME("separation"));
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sep = (dragger_visibility != DRAGGER_HIDDEN_COLLAPSED) ? MAX(sep, vertical ? g->get_height() : g->get_width()) : 0;
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// Compute the minimum size
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Size2 ms_first = first->get_combined_minimum_size();
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Size2 ms_second = second->get_combined_minimum_size();
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// Compute the separator position without the split offset
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float ratio = first->get_stretch_ratio() / (first->get_stretch_ratio() + second->get_stretch_ratio());
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int no_offset_middle_sep = 0;
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if (first_expanded && second_expanded) {
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no_offset_middle_sep = get_size()[axis] * ratio - sep / 2;
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} else if (first_expanded) {
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no_offset_middle_sep = get_size()[axis] - ms_second[axis] - sep;
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} else {
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no_offset_middle_sep = ms_first[axis];
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}
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// Compute the final middle separation
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middle_sep = no_offset_middle_sep;
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if (!collapsed) {
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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);
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middle_sep += clamped_split_offset;
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if (should_clamp_split_offset) {
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split_offset = clamped_split_offset;
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should_clamp_split_offset = false;
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}
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}
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if (vertical) {
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fit_child_in_rect(first, Rect2(Point2(0, 0), Size2(get_size().width, middle_sep)));
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int sofs = middle_sep + sep;
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fit_child_in_rect(second, Rect2(Point2(0, sofs), Size2(get_size().width, get_size().height - sofs)));
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} else {
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if (is_layout_rtl()) {
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middle_sep = get_size().width - middle_sep - sep;
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fit_child_in_rect(second, Rect2(Point2(0, 0), Size2(middle_sep, get_size().height)));
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int sofs = middle_sep + sep;
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fit_child_in_rect(first, Rect2(Point2(sofs, 0), Size2(get_size().width - sofs, get_size().height)));
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} else {
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fit_child_in_rect(first, Rect2(Point2(0, 0), Size2(middle_sep, get_size().height)));
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int sofs = middle_sep + sep;
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fit_child_in_rect(second, Rect2(Point2(sofs, 0), Size2(get_size().width - sofs, get_size().height)));
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}
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}
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update();
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}
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Size2 SplitContainer::get_minimum_size() const {
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/* Calculate MINIMUM SIZE */
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Size2i minimum;
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Ref<Texture2D> g = get_theme_icon(SNAME("grabber"));
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int sep = get_theme_constant(SNAME("separation"));
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sep = (dragger_visibility != DRAGGER_HIDDEN_COLLAPSED) ? MAX(sep, vertical ? g->get_height() : g->get_width()) : 0;
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for (int i = 0; i < 2; i++) {
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if (!_getch(i)) {
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break;
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}
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if (i == 1) {
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if (vertical) {
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minimum.height += sep;
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} else {
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minimum.width += sep;
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}
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}
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Size2 ms = _getch(i)->get_combined_minimum_size();
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if (vertical) {
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minimum.height += ms.height;
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minimum.width = MAX(minimum.width, ms.width);
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} else {
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minimum.width += ms.width;
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minimum.height = MAX(minimum.height, ms.height);
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}
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}
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return minimum;
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}
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void SplitContainer::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_TRANSLATION_CHANGED:
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case NOTIFICATION_LAYOUT_DIRECTION_CHANGED: {
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queue_sort();
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} break;
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case NOTIFICATION_SORT_CHILDREN: {
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_resort();
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} break;
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case NOTIFICATION_MOUSE_EXIT: {
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mouse_inside = false;
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if (get_theme_constant(SNAME("autohide"))) {
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update();
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}
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} break;
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case NOTIFICATION_DRAW: {
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if (!_getch(0) || !_getch(1)) {
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return;
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}
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if (collapsed || (!dragging && !mouse_inside && get_theme_constant(SNAME("autohide")))) {
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return;
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}
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if (dragger_visibility != DRAGGER_VISIBLE) {
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return;
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}
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int sep = dragger_visibility != DRAGGER_HIDDEN_COLLAPSED ? get_theme_constant(SNAME("separation")) : 0;
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Ref<Texture2D> tex = get_theme_icon(SNAME("grabber"));
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Size2 size = get_size();
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if (vertical) {
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draw_texture(tex, Point2i((size.x - tex->get_width()) / 2, middle_sep + (sep - tex->get_height()) / 2));
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} else {
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draw_texture(tex, Point2i(middle_sep + (sep - tex->get_width()) / 2, (size.y - tex->get_height()) / 2));
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}
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} break;
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case NOTIFICATION_THEME_CHANGED: {
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update_minimum_size();
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} break;
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}
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}
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void SplitContainer::gui_input(const Ref<InputEvent> &p_event) {
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ERR_FAIL_COND(p_event.is_null());
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if (collapsed || !_getch(0) || !_getch(1) || dragger_visibility != DRAGGER_VISIBLE) {
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return;
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}
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Ref<InputEventMouseButton> mb = p_event;
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if (mb.is_valid()) {
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if (mb->get_button_index() == MouseButton::LEFT) {
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if (mb->is_pressed()) {
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int sep = get_theme_constant(SNAME("separation"));
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if (vertical) {
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if (mb->get_position().y > middle_sep && mb->get_position().y < middle_sep + sep) {
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dragging = true;
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drag_from = mb->get_position().y;
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drag_ofs = split_offset;
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}
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} else {
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if (mb->get_position().x > middle_sep && mb->get_position().x < middle_sep + sep) {
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dragging = true;
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drag_from = mb->get_position().x;
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drag_ofs = split_offset;
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}
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}
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} else {
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dragging = false;
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}
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}
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}
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Ref<InputEventMouseMotion> mm = p_event;
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if (mm.is_valid()) {
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bool mouse_inside_state = false;
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if (vertical) {
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mouse_inside_state = mm->get_position().y > middle_sep && mm->get_position().y < middle_sep + get_theme_constant(SNAME("separation"));
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} else {
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mouse_inside_state = mm->get_position().x > middle_sep && mm->get_position().x < middle_sep + get_theme_constant(SNAME("separation"));
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}
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if (mouse_inside != mouse_inside_state) {
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mouse_inside = mouse_inside_state;
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if (get_theme_constant(SNAME("autohide"))) {
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update();
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}
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}
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if (!dragging) {
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return;
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}
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if (!vertical && is_layout_rtl()) {
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split_offset = drag_ofs + (drag_from - (vertical ? mm->get_position().y : mm->get_position().x));
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} else {
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split_offset = drag_ofs + ((vertical ? mm->get_position().y : mm->get_position().x) - drag_from);
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}
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should_clamp_split_offset = true;
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queue_sort();
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emit_signal(SNAME("dragged"), get_split_offset());
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}
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}
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Control::CursorShape SplitContainer::get_cursor_shape(const Point2 &p_pos) const {
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if (dragging) {
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return (vertical ? CURSOR_VSPLIT : CURSOR_HSPLIT);
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}
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if (!collapsed && _getch(0) && _getch(1) && dragger_visibility == DRAGGER_VISIBLE) {
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int sep = get_theme_constant(SNAME("separation"));
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if (vertical) {
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if (p_pos.y > middle_sep && p_pos.y < middle_sep + sep) {
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return CURSOR_VSPLIT;
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}
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} else {
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if (p_pos.x > middle_sep && p_pos.x < middle_sep + sep) {
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return CURSOR_HSPLIT;
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}
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}
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}
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return Control::get_cursor_shape(p_pos);
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}
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void SplitContainer::set_split_offset(int p_offset) {
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if (split_offset == p_offset) {
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return;
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}
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split_offset = p_offset;
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queue_sort();
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}
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int SplitContainer::get_split_offset() const {
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return split_offset;
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}
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void SplitContainer::clamp_split_offset() {
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should_clamp_split_offset = true;
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queue_sort();
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}
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void SplitContainer::set_collapsed(bool p_collapsed) {
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if (collapsed == p_collapsed) {
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return;
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}
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collapsed = p_collapsed;
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queue_sort();
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}
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void SplitContainer::set_dragger_visibility(DraggerVisibility p_visibility) {
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dragger_visibility = p_visibility;
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queue_sort();
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update();
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}
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SplitContainer::DraggerVisibility SplitContainer::get_dragger_visibility() const {
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return dragger_visibility;
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}
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bool SplitContainer::is_collapsed() const {
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return collapsed;
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}
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void SplitContainer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_split_offset", "offset"), &SplitContainer::set_split_offset);
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ClassDB::bind_method(D_METHOD("get_split_offset"), &SplitContainer::get_split_offset);
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ClassDB::bind_method(D_METHOD("clamp_split_offset"), &SplitContainer::clamp_split_offset);
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ClassDB::bind_method(D_METHOD("set_collapsed", "collapsed"), &SplitContainer::set_collapsed);
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ClassDB::bind_method(D_METHOD("is_collapsed"), &SplitContainer::is_collapsed);
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ClassDB::bind_method(D_METHOD("set_dragger_visibility", "mode"), &SplitContainer::set_dragger_visibility);
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ClassDB::bind_method(D_METHOD("get_dragger_visibility"), &SplitContainer::get_dragger_visibility);
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ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::INT, "offset")));
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ADD_PROPERTY(PropertyInfo(Variant::INT, "split_offset"), "set_split_offset", "get_split_offset");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collapsed"), "set_collapsed", "is_collapsed");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "dragger_visibility", PROPERTY_HINT_ENUM, "Visible,Hidden,Hidden and Collapsed"), "set_dragger_visibility", "get_dragger_visibility");
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BIND_ENUM_CONSTANT(DRAGGER_VISIBLE);
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BIND_ENUM_CONSTANT(DRAGGER_HIDDEN);
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BIND_ENUM_CONSTANT(DRAGGER_HIDDEN_COLLAPSED);
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}
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SplitContainer::SplitContainer(bool p_vertical) {
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vertical = p_vertical;
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}
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