mirror of
https://github.com/godotengine/godot
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323 lines
10 KiB
C++
323 lines
10 KiB
C++
/**************************************************************************/
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/* grid_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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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 "grid_container.h"
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#include "core/templates/rb_set.h"
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void GridContainer::_update_theme_item_cache() {
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Container::_update_theme_item_cache();
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theme_cache.h_separation = get_theme_constant(SNAME("h_separation"));
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theme_cache.v_separation = get_theme_constant(SNAME("v_separation"));
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}
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void GridContainer::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_SORT_CHILDREN: {
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RBMap<int, int> col_minw; // Max of min_width of all controls in each col (indexed by col).
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RBMap<int, int> row_minh; // Max of min_height of all controls in each row (indexed by row).
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RBSet<int> col_expanded; // Columns which have the SIZE_EXPAND flag set.
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RBSet<int> row_expanded; // Rows which have the SIZE_EXPAND flag set.
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// Compute the per-column/per-row data.
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int valid_controls_index = 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_in_tree()) {
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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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int row = valid_controls_index / columns;
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int col = valid_controls_index % columns;
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valid_controls_index++;
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Size2i ms = c->get_combined_minimum_size();
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if (col_minw.has(col)) {
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col_minw[col] = MAX(col_minw[col], ms.width);
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} else {
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col_minw[col] = ms.width;
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}
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if (row_minh.has(row)) {
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row_minh[row] = MAX(row_minh[row], ms.height);
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} else {
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row_minh[row] = ms.height;
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}
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if (c->get_h_size_flags().has_flag(SIZE_EXPAND)) {
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col_expanded.insert(col);
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}
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if (c->get_v_size_flags().has_flag(SIZE_EXPAND)) {
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row_expanded.insert(row);
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}
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}
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int max_col = MIN(valid_controls_index, columns);
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int max_row = ceil((float)valid_controls_index / (float)columns);
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// Consider all empty columns expanded.
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for (int i = valid_controls_index; i < columns; i++) {
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col_expanded.insert(i);
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}
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// Evaluate the remaining space for expanded columns/rows.
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Size2 remaining_space = get_size();
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for (const KeyValue<int, int> &E : col_minw) {
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if (!col_expanded.has(E.key)) {
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remaining_space.width -= E.value;
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}
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}
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for (const KeyValue<int, int> &E : row_minh) {
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if (!row_expanded.has(E.key)) {
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remaining_space.height -= E.value;
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}
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}
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remaining_space.height -= theme_cache.v_separation * MAX(max_row - 1, 0);
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remaining_space.width -= theme_cache.h_separation * MAX(max_col - 1, 0);
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bool can_fit = false;
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while (!can_fit && col_expanded.size() > 0) {
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// Check if all minwidth constraints are OK if we use the remaining space.
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can_fit = true;
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int max_index = col_expanded.front()->get();
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for (const int &E : col_expanded) {
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if (col_minw[E] > col_minw[max_index]) {
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max_index = E;
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}
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if (can_fit && (remaining_space.width / col_expanded.size()) < col_minw[E]) {
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can_fit = false;
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}
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}
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// If not, the column with maximum minwidth is not expanded.
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if (!can_fit) {
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col_expanded.erase(max_index);
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remaining_space.width -= col_minw[max_index];
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}
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}
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can_fit = false;
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while (!can_fit && row_expanded.size() > 0) {
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// Check if all minheight constraints are OK if we use the remaining space.
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can_fit = true;
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int max_index = row_expanded.front()->get();
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for (const int &E : row_expanded) {
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if (row_minh[E] > row_minh[max_index]) {
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max_index = E;
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}
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if (can_fit && (remaining_space.height / row_expanded.size()) < row_minh[E]) {
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can_fit = false;
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}
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}
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// If not, the row with maximum minheight is not expanded.
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if (!can_fit) {
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row_expanded.erase(max_index);
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remaining_space.height -= row_minh[max_index];
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}
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}
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// Finally, fit the nodes.
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int col_remaining_pixel = 0;
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int col_expand = 0;
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if (col_expanded.size() > 0) {
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col_expand = remaining_space.width / col_expanded.size();
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col_remaining_pixel = remaining_space.width - col_expanded.size() * col_expand;
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}
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int row_remaining_pixel = 0;
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int row_expand = 0;
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if (row_expanded.size() > 0) {
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row_expand = remaining_space.height / row_expanded.size();
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row_remaining_pixel = remaining_space.height - row_expanded.size() * row_expand;
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}
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bool rtl = is_layout_rtl();
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int col_ofs = 0;
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int row_ofs = 0;
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// Calculate the index of rows and columns that receive the remaining pixel.
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int col_remaining_pixel_index = 0;
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for (int i = 0; i < max_col; i++) {
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if (col_remaining_pixel == 0) {
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break;
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}
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if (col_expanded.has(i)) {
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col_remaining_pixel_index = i + 1;
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col_remaining_pixel--;
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}
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}
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int row_remaining_pixel_index = 0;
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for (int i = 0; i < max_row; i++) {
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if (row_remaining_pixel == 0) {
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break;
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}
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if (row_expanded.has(i)) {
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row_remaining_pixel_index = i + 1;
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row_remaining_pixel--;
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}
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}
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valid_controls_index = 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_in_tree()) {
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continue;
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}
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int row = valid_controls_index / columns;
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int col = valid_controls_index % columns;
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valid_controls_index++;
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if (col == 0) {
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if (rtl) {
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col_ofs = get_size().width;
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} else {
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col_ofs = 0;
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}
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if (row > 0) {
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row_ofs += (row_expanded.has(row - 1) ? row_expand : row_minh[row - 1]) + theme_cache.v_separation;
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if (row_expanded.has(row - 1) && row - 1 < row_remaining_pixel_index) {
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// Apply the remaining pixel of the previous row.
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row_ofs++;
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}
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}
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}
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Size2 s(col_expanded.has(col) ? col_expand : col_minw[col], row_expanded.has(row) ? row_expand : row_minh[row]);
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// Add the remaining pixel to the expanding columns and rows, starting from left and top.
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if (col_expanded.has(col) && col < col_remaining_pixel_index) {
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s.x++;
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}
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if (row_expanded.has(row) && row < row_remaining_pixel_index) {
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s.y++;
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}
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if (rtl) {
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Point2 p(col_ofs - s.width, row_ofs);
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fit_child_in_rect(c, Rect2(p, s));
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col_ofs -= s.width + theme_cache.h_separation;
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} else {
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Point2 p(col_ofs, row_ofs);
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fit_child_in_rect(c, Rect2(p, s));
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col_ofs += s.width + theme_cache.h_separation;
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}
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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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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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}
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}
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void GridContainer::set_columns(int p_columns) {
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ERR_FAIL_COND(p_columns < 1);
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if (columns == p_columns) {
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return;
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}
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columns = p_columns;
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queue_sort();
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update_minimum_size();
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}
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int GridContainer::get_columns() const {
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return columns;
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}
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void GridContainer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_columns", "columns"), &GridContainer::set_columns);
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ClassDB::bind_method(D_METHOD("get_columns"), &GridContainer::get_columns);
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ADD_PROPERTY(PropertyInfo(Variant::INT, "columns", PROPERTY_HINT_RANGE, "1,1024,1"), "set_columns", "get_columns");
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}
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Size2 GridContainer::get_minimum_size() const {
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RBMap<int, int> col_minw;
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RBMap<int, int> row_minh;
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int max_row = 0;
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int max_col = 0;
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int valid_controls_index = 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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int row = valid_controls_index / columns;
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int col = valid_controls_index % columns;
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valid_controls_index++;
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Size2i ms = c->get_combined_minimum_size();
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if (col_minw.has(col)) {
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col_minw[col] = MAX(col_minw[col], ms.width);
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} else {
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col_minw[col] = ms.width;
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}
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if (row_minh.has(row)) {
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row_minh[row] = MAX(row_minh[row], ms.height);
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} else {
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row_minh[row] = ms.height;
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}
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max_col = MAX(col, max_col);
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max_row = MAX(row, max_row);
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}
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Size2 ms;
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for (const KeyValue<int, int> &E : col_minw) {
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ms.width += E.value;
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}
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for (const KeyValue<int, int> &E : row_minh) {
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ms.height += E.value;
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}
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ms.height += theme_cache.v_separation * max_row;
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ms.width += theme_cache.h_separation * max_col;
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return ms;
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}
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GridContainer::GridContainer() {}
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