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virtualx-engine/scene/gui/scroll_container.cpp
Rémi Verschelde 5dbf1809c6 A Whole New World (clang-format edition) 
I can show you the code
Pretty, with proper whitespace
Tell me, coder, now when did
You last write readable code?

I can open your eyes
Make you see your bad indent
Force you to respect the style
The core devs agreed upon

A whole new world
A new fantastic code format
A de facto standard
With some sugar
Enforced with clang-format

A whole new world
A dazzling style we all dreamed of
And when we read it through
It's crystal clear
That now we're in a whole new world of code
2017-03-05 16:44:50 +01:00

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/*************************************************************************/
/* scroll_container.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "scroll_container.h"
#include "os/os.h"
bool ScrollContainer::clips_input() const {
return true;
}
Size2 ScrollContainer::get_minimum_size() const {
Size2 min_size;
for (int i = 0; i < get_child_count(); i++) {
Control *c = get_child(i)->cast_to<Control>();
if (!c)
continue;
if (c->is_set_as_toplevel())
continue;
if (c == h_scroll || c == v_scroll)
continue;
Size2 minsize = c->get_combined_minimum_size();
if (!scroll_h) {
min_size.x = MAX(min_size.x, minsize.x);
}
if (!scroll_v) {
min_size.y = MAX(min_size.y, minsize.y);
}
}
if (h_scroll->is_visible_in_tree()) {
min_size.y += h_scroll->get_minimum_size().y;
}
if (v_scroll->is_visible_in_tree()) {
min_size.x += v_scroll->get_minimum_size().x;
}
return min_size;
};
void ScrollContainer::_cancel_drag() {
set_fixed_process(false);
drag_touching_deaccel = false;
drag_touching = false;
drag_speed = Vector2();
drag_accum = Vector2();
last_drag_accum = Vector2();
drag_from = Vector2();
}
void ScrollContainer::_gui_input(const InputEvent &p_gui_input) {
switch (p_gui_input.type) {
case InputEvent::MOUSE_BUTTON: {
const InputEventMouseButton &mb = p_gui_input.mouse_button;
if (mb.button_index == BUTTON_WHEEL_UP && mb.pressed) {
if (h_scroll->is_visible_in_tree() && !v_scroll->is_visible_in_tree()) {
// only horizontal is enabled, scroll horizontally
h_scroll->set_value(h_scroll->get_value() - h_scroll->get_page() / 8);
} else if (v_scroll->is_visible_in_tree()) {
v_scroll->set_value(v_scroll->get_value() - v_scroll->get_page() / 8);
}
}
if (mb.button_index == BUTTON_WHEEL_DOWN && mb.pressed) {
if (h_scroll->is_visible_in_tree() && !v_scroll->is_visible_in_tree()) {
// only horizontal is enabled, scroll horizontally
h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() / 8);
} else if (v_scroll->is_visible_in_tree()) {
v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() / 8);
}
}
if (!OS::get_singleton()->has_touchscreen_ui_hint())
return;
if (mb.button_index != BUTTON_LEFT)
break;
if (mb.pressed) {
if (drag_touching) {
set_fixed_process(false);
drag_touching_deaccel = false;
drag_touching = false;
drag_speed = Vector2();
drag_accum = Vector2();
last_drag_accum = Vector2();
drag_from = Vector2();
}
if (true) {
drag_speed = Vector2();
drag_accum = Vector2();
last_drag_accum = Vector2();
drag_from = Vector2(h_scroll->get_value(), v_scroll->get_value());
drag_touching = OS::get_singleton()->has_touchscreen_ui_hint();
drag_touching_deaccel = false;
time_since_motion = 0;
if (drag_touching) {
set_fixed_process(true);
time_since_motion = 0;
}
}
} else {
if (drag_touching) {
if (drag_speed == Vector2()) {
drag_touching_deaccel = false;
drag_touching = false;
set_fixed_process(false);
} else {
drag_touching_deaccel = true;
}
}
}
} break;
case InputEvent::MOUSE_MOTION: {
const InputEventMouseMotion &mm = p_gui_input.mouse_motion;
if (drag_touching && !drag_touching_deaccel) {
Vector2 motion = Vector2(mm.relative_x, mm.relative_y);
drag_accum -= motion;
Vector2 diff = drag_from + drag_accum;
if (scroll_h)
h_scroll->set_value(diff.x);
else
drag_accum.x = 0;
if (scroll_v)
v_scroll->set_value(diff.y);
else
drag_accum.y = 0;
time_since_motion = 0;
}
} break;
}
}
void ScrollContainer::_update_scrollbar_pos() {
Size2 hmin = h_scroll->get_combined_minimum_size();
Size2 vmin = v_scroll->get_combined_minimum_size();
v_scroll->set_anchor_and_margin(MARGIN_LEFT, ANCHOR_END, vmin.width);
v_scroll->set_anchor_and_margin(MARGIN_RIGHT, ANCHOR_END, 0);
v_scroll->set_anchor_and_margin(MARGIN_TOP, ANCHOR_BEGIN, 0);
v_scroll->set_anchor_and_margin(MARGIN_BOTTOM, ANCHOR_END, 0);
h_scroll->set_anchor_and_margin(MARGIN_LEFT, ANCHOR_BEGIN, 0);
h_scroll->set_anchor_and_margin(MARGIN_RIGHT, ANCHOR_END, 0);
h_scroll->set_anchor_and_margin(MARGIN_TOP, ANCHOR_END, hmin.height);
h_scroll->set_anchor_and_margin(MARGIN_BOTTOM, ANCHOR_END, 0);
h_scroll->raise();
v_scroll->raise();
}
void ScrollContainer::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE || p_what == NOTIFICATION_THEME_CHANGED) {
call_deferred("_update_scrollbar_pos");
};
if (p_what == NOTIFICATION_SORT_CHILDREN) {
child_max_size = Size2(0, 0);
Size2 size = get_size();
if (h_scroll->is_visible_in_tree())
size.y -= h_scroll->get_minimum_size().y;
if (v_scroll->is_visible_in_tree())
size.x -= h_scroll->get_minimum_size().x;
for (int i = 0; i < get_child_count(); i++) {
Control *c = get_child(i)->cast_to<Control>();
if (!c)
continue;
if (c->is_set_as_toplevel())
continue;
if (c == h_scroll || c == v_scroll)
continue;
Size2 minsize = c->get_combined_minimum_size();
child_max_size.x = MAX(child_max_size.x, minsize.x);
child_max_size.y = MAX(child_max_size.y, minsize.y);
Rect2 r = Rect2(-scroll, minsize);
if (!scroll_h || (!h_scroll->is_visible_in_tree() && c->get_h_size_flags() & SIZE_EXPAND)) {
r.pos.x = 0;
if (c->get_h_size_flags() & SIZE_EXPAND)
r.size.width = MAX(size.width, minsize.width);
else
r.size.width = minsize.width;
}
if (!scroll_v || (!v_scroll->is_visible_in_tree() && c->get_v_size_flags() & SIZE_EXPAND)) {
r.pos.y = 0;
r.size.height = size.height;
if (c->get_v_size_flags() & SIZE_EXPAND)
r.size.height = MAX(size.height, minsize.height);
else
r.size.height = minsize.height;
}
fit_child_in_rect(c, r);
}
update();
};
if (p_what == NOTIFICATION_DRAW) {
update_scrollbars();
}
if (p_what == NOTIFICATION_FIXED_PROCESS) {
if (drag_touching) {
if (drag_touching_deaccel) {
Vector2 pos = Vector2(h_scroll->get_value(), v_scroll->get_value());
pos += drag_speed * get_fixed_process_delta_time();
bool turnoff_h = false;
bool turnoff_v = false;
if (pos.x < 0) {
pos.x = 0;
turnoff_h = true;
}
if (pos.x > (h_scroll->get_max() - h_scroll->get_page())) {
pos.x = h_scroll->get_max() - h_scroll->get_page();
turnoff_h = true;
}
if (pos.y < 0) {
pos.y = 0;
turnoff_v = true;
}
if (pos.y > (v_scroll->get_max() - v_scroll->get_page())) {
pos.y = v_scroll->get_max() - v_scroll->get_page();
turnoff_v = true;
}
if (scroll_h)
h_scroll->set_value(pos.x);
if (scroll_v)
v_scroll->set_value(pos.y);
float sgn_x = drag_speed.x < 0 ? -1 : 1;
float val_x = Math::abs(drag_speed.x);
val_x -= 1000 * get_fixed_process_delta_time();
if (val_x < 0) {
turnoff_h = true;
}
float sgn_y = drag_speed.y < 0 ? -1 : 1;
float val_y = Math::abs(drag_speed.y);
val_y -= 1000 * get_fixed_process_delta_time();
if (val_y < 0) {
turnoff_v = true;
}
drag_speed = Vector2(sgn_x * val_x, sgn_y * val_y);
if (turnoff_h && turnoff_v) {
set_fixed_process(false);
drag_touching = false;
drag_touching_deaccel = false;
}
} else {
if (time_since_motion == 0 || time_since_motion > 0.1) {
Vector2 diff = drag_accum - last_drag_accum;
last_drag_accum = drag_accum;
drag_speed = diff / get_fixed_process_delta_time();
}
time_since_motion += get_fixed_process_delta_time();
}
}
}
};
void ScrollContainer::update_scrollbars() {
Size2 size = get_size();
Size2 hmin = h_scroll->get_combined_minimum_size();
Size2 vmin = v_scroll->get_combined_minimum_size();
Size2 min = child_max_size;
if (!scroll_v || min.height <= size.height - hmin.height) {
v_scroll->hide();
scroll.y = 0;
} else {
v_scroll->show();
scroll.y = v_scroll->get_value();
}
v_scroll->set_max(min.height);
v_scroll->set_page(size.height - hmin.height);
if (!scroll_h || min.width <= size.width - vmin.width) {
h_scroll->hide();
scroll.x = 0;
} else {
h_scroll->show();
h_scroll->set_max(min.width);
h_scroll->set_page(size.width - vmin.width);
scroll.x = h_scroll->get_value();
}
}
void ScrollContainer::_scroll_moved(float) {
scroll.x = h_scroll->get_value();
scroll.y = v_scroll->get_value();
queue_sort();
update();
};
void ScrollContainer::set_enable_h_scroll(bool p_enable) {
scroll_h = p_enable;
queue_sort();
}
bool ScrollContainer::is_h_scroll_enabled() const {
return scroll_h;
}
void ScrollContainer::set_enable_v_scroll(bool p_enable) {
scroll_v = p_enable;
queue_sort();
}
bool ScrollContainer::is_v_scroll_enabled() const {
return scroll_v;
}
int ScrollContainer::get_v_scroll() const {
return v_scroll->get_value();
}
void ScrollContainer::set_v_scroll(int p_pos) {
v_scroll->set_value(p_pos);
_cancel_drag();
}
int ScrollContainer::get_h_scroll() const {
return h_scroll->get_value();
}
void ScrollContainer::set_h_scroll(int p_pos) {
h_scroll->set_value(p_pos);
_cancel_drag();
}
String ScrollContainer::get_configuration_warning() const {
int found = 0;
for (int i = 0; i < get_child_count(); i++) {
Control *c = get_child(i)->cast_to<Control>();
if (!c)
continue;
if (c->is_set_as_toplevel())
continue;
if (c == h_scroll || c == v_scroll)
continue;
found++;
}
if (found != 1)
return TTR("ScrollContainer is intended to work with a single child control.\nUse a container as child (VBox,HBox,etc), or a Control and set the custom minimum size manually.");
else
return "";
}
void ScrollContainer::_bind_methods() {
ClassDB::bind_method(D_METHOD("_scroll_moved"), &ScrollContainer::_scroll_moved);
ClassDB::bind_method(D_METHOD("_gui_input"), &ScrollContainer::_gui_input);
ClassDB::bind_method(D_METHOD("set_enable_h_scroll", "enable"), &ScrollContainer::set_enable_h_scroll);
ClassDB::bind_method(D_METHOD("is_h_scroll_enabled"), &ScrollContainer::is_h_scroll_enabled);
ClassDB::bind_method(D_METHOD("set_enable_v_scroll", "enable"), &ScrollContainer::set_enable_v_scroll);
ClassDB::bind_method(D_METHOD("is_v_scroll_enabled"), &ScrollContainer::is_v_scroll_enabled);
ClassDB::bind_method(D_METHOD("_update_scrollbar_pos"), &ScrollContainer::_update_scrollbar_pos);
ClassDB::bind_method(D_METHOD("set_h_scroll", "val"), &ScrollContainer::set_h_scroll);
ClassDB::bind_method(D_METHOD("get_h_scroll"), &ScrollContainer::get_h_scroll);
ClassDB::bind_method(D_METHOD("set_v_scroll", "val"), &ScrollContainer::set_v_scroll);
ClassDB::bind_method(D_METHOD("get_v_scroll"), &ScrollContainer::get_v_scroll);
ADD_GROUP("Scroll", "scroll_");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_horizontal"), "set_enable_h_scroll", "is_h_scroll_enabled");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical"), "set_enable_v_scroll", "is_v_scroll_enabled");
};
ScrollContainer::ScrollContainer() {
h_scroll = memnew(HScrollBar);
h_scroll->set_name("_h_scroll");
add_child(h_scroll);
v_scroll = memnew(VScrollBar);
v_scroll->set_name("_v_scroll");
add_child(v_scroll);
h_scroll->connect("value_changed", this, "_scroll_moved");
v_scroll->connect("value_changed", this, "_scroll_moved");
drag_speed = Vector2();
drag_touching = false;
drag_touching_deaccel = false;
scroll_h = true;
scroll_v = true;
set_clip_contents(true);
};
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