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-rw-r--r--scene/gui/flow_container.cpp252
-rw-r--r--scene/gui/flow_container.h76
2 files changed, 328 insertions, 0 deletions
diff --git a/scene/gui/flow_container.cpp b/scene/gui/flow_container.cpp
new file mode 100644
index 0000000000..d1ac60b325
--- /dev/null
+++ b/scene/gui/flow_container.cpp
@@ -0,0 +1,252 @@
+/*************************************************************************/
+/* flow_container.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 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 "scene/gui/container.h"
+
+#include "flow_container.h"
+
+struct _LineData {
+ int child_count = 0;
+ int min_line_height = 0;
+ int min_line_length = 0;
+ int stretch_avail = 0;
+ float stretch_ratio_total = 0;
+};
+
+void FlowContainer::_resort() {
+ int separation_horizontal = get_theme_constant(SNAME("hseparation"));
+ int separation_vertical = get_theme_constant(SNAME("vseparation"));
+
+ bool rtl = is_layout_rtl();
+
+ Map<Control *, Size2i> children_minsize_cache;
+
+ Vector<_LineData> lines_data;
+
+ Vector2i ofs;
+ int line_height = 0;
+ int line_length = 0;
+ float line_stretch_ratio_total = 0;
+ int current_container_size = vertical ? get_rect().size.y : get_rect().size.x;
+ int children_in_current_line = 0;
+
+ // First pass for line wrapping and minimum size calculation.
+ for (int i = 0; i < get_child_count(); i++) {
+ Control *child = Object::cast_to<Control>(get_child(i));
+ if (!child || !child->is_visible_in_tree()) {
+ continue;
+ }
+ if (child->is_set_as_top_level()) {
+ continue;
+ }
+
+ Size2i child_msc = child->get_combined_minimum_size();
+
+ if (vertical) { /* VERTICAL */
+ if (children_in_current_line > 0) {
+ ofs.y += separation_vertical;
+ }
+ if (ofs.y + child_msc.y > current_container_size) {
+ line_length = ofs.y - separation_vertical;
+ lines_data.push_back(_LineData{ children_in_current_line, line_height, line_length, current_container_size - line_length, line_stretch_ratio_total });
+
+ // Move in new column (vertical line).
+ ofs.x += line_height + separation_horizontal;
+ ofs.y = 0;
+ line_height = 0;
+ line_stretch_ratio_total = 0;
+ children_in_current_line = 0;
+ }
+
+ line_height = MAX(line_height, child_msc.x);
+ if (child->get_v_size_flags() & SIZE_EXPAND) {
+ line_stretch_ratio_total += child->get_stretch_ratio();
+ }
+ ofs.y += child_msc.y;
+
+ } else { /* HORIZONTAL */
+ if (children_in_current_line > 0) {
+ ofs.x += separation_horizontal;
+ }
+ if (ofs.x + child_msc.x > current_container_size) {
+ line_length = ofs.x - separation_horizontal;
+ lines_data.push_back(_LineData{ children_in_current_line, line_height, line_length, current_container_size - line_length, line_stretch_ratio_total });
+
+ // Move in new line.
+ ofs.y += line_height + separation_vertical;
+ ofs.x = 0;
+ line_height = 0;
+ line_stretch_ratio_total = 0;
+ children_in_current_line = 0;
+ }
+
+ line_height = MAX(line_height, child_msc.y);
+ if (child->get_h_size_flags() & SIZE_EXPAND) {
+ line_stretch_ratio_total += child->get_stretch_ratio();
+ }
+ ofs.x += child_msc.x;
+ }
+
+ children_minsize_cache[child] = child_msc;
+ children_in_current_line++;
+ }
+ line_length = vertical ? (ofs.y) : (ofs.x);
+ lines_data.push_back(_LineData{ children_in_current_line, line_height, line_length, current_container_size - line_length, line_stretch_ratio_total });
+
+ // Second pass for in-line expansion and alignment.
+
+ int current_line_idx = 0;
+ int child_idx_in_line = 0;
+
+ ofs.x = 0;
+ ofs.y = 0;
+
+ for (int i = 0; i < get_child_count(); i++) {
+ Control *child = Object::cast_to<Control>(get_child(i));
+ if (!child || !child->is_visible_in_tree()) {
+ continue;
+ }
+ if (child->is_set_as_top_level()) {
+ continue;
+ }
+ Size2i child_size = children_minsize_cache[child];
+
+ _LineData line_data = lines_data[current_line_idx];
+ if (child_idx_in_line >= lines_data[current_line_idx].child_count) {
+ current_line_idx++;
+ child_idx_in_line = 0;
+ if (vertical) {
+ ofs.x += line_data.min_line_height + separation_horizontal;
+ ofs.y = 0;
+ } else {
+ ofs.x = 0;
+ ofs.y += line_data.min_line_height + separation_vertical;
+ }
+ line_data = lines_data[current_line_idx];
+ }
+
+ if (vertical) { /* VERTICAL */
+ if (child->get_h_size_flags() & (SIZE_FILL | SIZE_SHRINK_CENTER | SIZE_SHRINK_END)) {
+ child_size.width = line_data.min_line_height;
+ }
+
+ if (child->get_v_size_flags() & SIZE_EXPAND) {
+ int stretch = line_data.stretch_avail * child->get_stretch_ratio() / line_data.stretch_ratio_total;
+ child_size.height += stretch;
+ }
+
+ } else { /* HORIZONTAL */
+ if (child->get_v_size_flags() & (SIZE_FILL | SIZE_SHRINK_CENTER | SIZE_SHRINK_END)) {
+ child_size.height = line_data.min_line_height;
+ }
+
+ if (child->get_h_size_flags() & SIZE_EXPAND) {
+ int stretch = line_data.stretch_avail * child->get_stretch_ratio() / line_data.stretch_ratio_total;
+ child_size.width += stretch;
+ }
+ }
+
+ Rect2 child_rect = Rect2(ofs, child_size);
+ if (rtl) {
+ child_rect.position.x = get_rect().size.x - child_rect.position.x - child_rect.size.width;
+ }
+
+ fit_child_in_rect(child, child_rect);
+
+ if (vertical) { /* VERTICAL */
+ ofs.y += child_size.height + separation_vertical;
+ } else { /* HORIZONTAL */
+ ofs.x += child_size.width + separation_horizontal;
+ }
+
+ child_idx_in_line++;
+ }
+ cached_size = (vertical ? ofs.x : ofs.y) + line_height;
+ cached_line_count = lines_data.size();
+}
+
+Size2 FlowContainer::get_minimum_size() const {
+ Size2i minimum;
+
+ for (int i = 0; i < get_child_count(); i++) {
+ Control *c = Object::cast_to<Control>(get_child(i));
+ if (!c) {
+ continue;
+ }
+ if (c->is_set_as_top_level()) {
+ continue;
+ }
+
+ if (!c->is_visible()) {
+ continue;
+ }
+
+ Size2i size = c->get_combined_minimum_size();
+
+ if (vertical) { /* VERTICAL */
+ minimum.height = MAX(minimum.height, size.height);
+ minimum.width = cached_size;
+
+ } else { /* HORIZONTAL */
+ minimum.width = MAX(minimum.width, size.width);
+ minimum.height = cached_size;
+ }
+ }
+
+ return minimum;
+}
+
+void FlowContainer::_notification(int p_what) {
+ switch (p_what) {
+ case NOTIFICATION_SORT_CHILDREN: {
+ _resort();
+ update_minimum_size();
+ } break;
+ case NOTIFICATION_THEME_CHANGED: {
+ update_minimum_size();
+ } break;
+ case NOTIFICATION_TRANSLATION_CHANGED:
+ case NOTIFICATION_LAYOUT_DIRECTION_CHANGED: {
+ queue_sort();
+ } break;
+ }
+}
+
+int FlowContainer::get_line_count() const {
+ return cached_line_count;
+}
+
+FlowContainer::FlowContainer(bool p_vertical) {
+ vertical = p_vertical;
+}
+
+void FlowContainer::_bind_methods() {
+ ClassDB::bind_method(D_METHOD("get_line_count"), &FlowContainer::get_line_count);
+}
diff --git a/scene/gui/flow_container.h b/scene/gui/flow_container.h
new file mode 100644
index 0000000000..e3ed423ae1
--- /dev/null
+++ b/scene/gui/flow_container.h
@@ -0,0 +1,76 @@
+/*************************************************************************/
+/* flow_container.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 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. */
+/*************************************************************************/
+
+#ifndef FLOW_CONTAINER_H
+#define FLOW_CONTAINER_H
+
+class Container;
+
+class FlowContainer : public Container {
+ GDCLASS(FlowContainer, Container);
+
+private:
+ int cached_size = 0;
+ int cached_line_count = 0;
+
+ bool vertical = false;
+
+ void _resort();
+
+protected:
+ void _notification(int p_what);
+
+ static void _bind_methods();
+
+public:
+ int get_line_count() const;
+
+ virtual Size2 get_minimum_size() const override;
+
+ FlowContainer(bool p_vertical = false);
+};
+
+class HFlowContainer : public FlowContainer {
+ GDCLASS(HFlowContainer, FlowContainer);
+
+public:
+ HFlowContainer() :
+ FlowContainer(false) {}
+};
+
+class VFlowContainer : public FlowContainer {
+ GDCLASS(VFlowContainer, FlowContainer);
+
+public:
+ VFlowContainer() :
+ FlowContainer(true) {}
+};
+
+#endif // FLOW_CONTAINER_H
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