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virtualx-engine/scene/gui/scroll_bar.cpp
Juan Linietsky 33b5c57199 Variant: Added 64-bit packed arrays, renamed Variant::REAL to FLOAT. 
- Renames PackedIntArray to PackedInt32Array.
- Renames PackedFloatArray to PackedFloat32Array.
- Adds PackedInt64Array and PackedFloat64Array.
- Renames Variant::REAL to Variant::FLOAT for consistency.

Packed arrays are for storing large amount of data and creating stuff like
meshes, buffers. textures, etc. Forcing them to be 64 is a huge waste of
memory. That said, many users requested the ability to have 64 bits packed
arrays for their games, so this is just an optional added type.

For Variant, the float datatype is always 64 bits, and exposed as `float`.

We still have `real_t` which is the datatype that can change from 32 to 64
bits depending on a compile flag (not entirely working right now, but that's
the idea). It affects math related datatypes and code only.

Neither Variant nor PackedArray make use of real_t, which is only intended
for math precision, so the term is removed from there to keep only float.
2020-02-25 12:55:53 +01:00

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/*************************************************************************/
/* scroll_bar.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 "scroll_bar.h"
#include "core/os/keyboard.h"
#include "core/os/os.h"
#include "core/print_string.h"
bool ScrollBar::focus_by_default = false;
void ScrollBar::set_can_focus_by_default(bool p_can_focus) {
focus_by_default = p_can_focus;
}
void ScrollBar::_gui_input(Ref<InputEvent> p_event) {
Ref<InputEventMouseMotion> m = p_event;
if (!m.is_valid() || drag.active) {
emit_signal("scrolling");
}
Ref<InputEventMouseButton> b = p_event;
if (b.is_valid()) {
accept_event();
if (b->get_button_index() == BUTTON_WHEEL_DOWN && b->is_pressed()) {
set_value(get_value() + get_page() / 4.0);
accept_event();
}
if (b->get_button_index() == BUTTON_WHEEL_UP && b->is_pressed()) {
set_value(get_value() - get_page() / 4.0);
accept_event();
}
if (b->get_button_index() != BUTTON_LEFT)
return;
if (b->is_pressed()) {
double ofs = orientation == VERTICAL ? b->get_position().y : b->get_position().x;
Ref<Texture2D> decr = get_icon("decrement");
Ref<Texture2D> incr = get_icon("increment");
double decr_size = orientation == VERTICAL ? decr->get_height() : decr->get_width();
double incr_size = orientation == VERTICAL ? incr->get_height() : incr->get_width();
double grabber_ofs = get_grabber_offset();
double grabber_size = get_grabber_size();
double total = orientation == VERTICAL ? get_size().height : get_size().width;
if (ofs < decr_size) {
set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
return;
}
if (ofs > total - incr_size) {
set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
return;
}
ofs -= decr_size;
if (ofs < grabber_ofs) {
if (scrolling) {
target_scroll = CLAMP(target_scroll - get_page(), get_min(), get_max() - get_page());
} else {
target_scroll = CLAMP(get_value() - get_page(), get_min(), get_max() - get_page());
}
if (smooth_scroll_enabled) {
scrolling = true;
set_physics_process_internal(true);
} else {
set_value(target_scroll);
}
return;
}
ofs -= grabber_ofs;
if (ofs < grabber_size) {
drag.active = true;
drag.pos_at_click = grabber_ofs + ofs;
drag.value_at_click = get_as_ratio();
update();
} else {
if (scrolling) {
target_scroll = CLAMP(target_scroll + get_page(), get_min(), get_max() - get_page());
} else {
target_scroll = CLAMP(get_value() + get_page(), get_min(), get_max() - get_page());
}
if (smooth_scroll_enabled) {
scrolling = true;
set_physics_process_internal(true);
} else {
set_value(target_scroll);
}
}
} else {
drag.active = false;
update();
}
}
if (m.is_valid()) {
accept_event();
if (drag.active) {
double ofs = orientation == VERTICAL ? m->get_position().y : m->get_position().x;
Ref<Texture2D> decr = get_icon("decrement");
double decr_size = orientation == VERTICAL ? decr->get_height() : decr->get_width();
ofs -= decr_size;
double diff = (ofs - drag.pos_at_click) / get_area_size();
set_as_ratio(drag.value_at_click + diff);
} else {
double ofs = orientation == VERTICAL ? m->get_position().y : m->get_position().x;
Ref<Texture2D> decr = get_icon("decrement");
Ref<Texture2D> incr = get_icon("increment");
double decr_size = orientation == VERTICAL ? decr->get_height() : decr->get_width();
double incr_size = orientation == VERTICAL ? incr->get_height() : incr->get_width();
double total = orientation == VERTICAL ? get_size().height : get_size().width;
HighlightStatus new_hilite;
if (ofs < decr_size) {
new_hilite = HIGHLIGHT_DECR;
} else if (ofs > total - incr_size) {
new_hilite = HIGHLIGHT_INCR;
} else {
new_hilite = HIGHLIGHT_RANGE;
}
if (new_hilite != highlight) {
highlight = new_hilite;
update();
}
}
}
if (p_event->is_pressed()) {
if (p_event->is_action("ui_left")) {
if (orientation != HORIZONTAL)
return;
set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
} else if (p_event->is_action("ui_right")) {
if (orientation != HORIZONTAL)
return;
set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
} else if (p_event->is_action("ui_up")) {
if (orientation != VERTICAL)
return;
set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
} else if (p_event->is_action("ui_down")) {
if (orientation != VERTICAL)
return;
set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
} else if (p_event->is_action("ui_home")) {
set_value(get_min());
} else if (p_event->is_action("ui_end")) {
set_value(get_max());
}
}
}
void ScrollBar::_notification(int p_what) {
if (p_what == NOTIFICATION_DRAW) {
RID ci = get_canvas_item();
Ref<Texture2D> decr = highlight == HIGHLIGHT_DECR ? get_icon("decrement_highlight") : get_icon("decrement");
Ref<Texture2D> incr = highlight == HIGHLIGHT_INCR ? get_icon("increment_highlight") : get_icon("increment");
Ref<StyleBox> bg = has_focus() ? get_stylebox("scroll_focus") : get_stylebox("scroll");
Ref<StyleBox> grabber;
if (drag.active)
grabber = get_stylebox("grabber_pressed");
else if (highlight == HIGHLIGHT_RANGE)
grabber = get_stylebox("grabber_highlight");
else
grabber = get_stylebox("grabber");
Point2 ofs;
decr->draw(ci, Point2());
if (orientation == HORIZONTAL)
ofs.x += decr->get_width();
else
ofs.y += decr->get_height();
Size2 area = get_size();
if (orientation == HORIZONTAL)
area.width -= incr->get_width() + decr->get_width();
else
area.height -= incr->get_height() + decr->get_height();
bg->draw(ci, Rect2(ofs, area));
if (orientation == HORIZONTAL)
ofs.width += area.width;
else
ofs.height += area.height;
incr->draw(ci, ofs);
Rect2 grabber_rect;
if (orientation == HORIZONTAL) {
grabber_rect.size.width = get_grabber_size();
grabber_rect.size.height = get_size().height;
grabber_rect.position.y = 0;
grabber_rect.position.x = get_grabber_offset() + decr->get_width() + bg->get_margin(MARGIN_LEFT);
} else {
grabber_rect.size.width = get_size().width;
grabber_rect.size.height = get_grabber_size();
grabber_rect.position.y = get_grabber_offset() + decr->get_height() + bg->get_margin(MARGIN_TOP);
grabber_rect.position.x = 0;
}
grabber->draw(ci, grabber_rect);
}
if (p_what == NOTIFICATION_ENTER_TREE) {
if (has_node(drag_node_path)) {
Node *n = get_node(drag_node_path);
drag_node = Object::cast_to<Control>(n);
}
if (drag_node) {
drag_node->connect_compat("gui_input", this, "_drag_node_input");
drag_node->connect_compat("tree_exiting", this, "_drag_node_exit", varray(), CONNECT_ONESHOT);
}
}
if (p_what == NOTIFICATION_EXIT_TREE) {
if (drag_node) {
drag_node->disconnect_compat("gui_input", this, "_drag_node_input");
drag_node->disconnect_compat("tree_exiting", this, "_drag_node_exit");
}
drag_node = NULL;
}
if (p_what == NOTIFICATION_INTERNAL_PHYSICS_PROCESS) {
if (scrolling) {
if (get_value() != target_scroll) {
double target = target_scroll - get_value();
double dist = sqrt(target * target);
double vel = ((target / dist) * 500) * get_physics_process_delta_time();
if (Math::abs(vel) >= dist) {
set_value(target_scroll);
scrolling = false;
set_physics_process_internal(false);
} else {
set_value(get_value() + vel);
}
} else {
scrolling = false;
set_physics_process_internal(false);
}
} else if (drag_node_touching) {
if (drag_node_touching_deaccel) {
Vector2 pos = Vector2(orientation == HORIZONTAL ? get_value() : 0, orientation == VERTICAL ? get_value() : 0);
pos += drag_node_speed * get_physics_process_delta_time();
bool turnoff = false;
if (orientation == HORIZONTAL) {
if (pos.x < 0) {
pos.x = 0;
turnoff = true;
}
if (pos.x > (get_max() - get_page())) {
pos.x = get_max() - get_page();
turnoff = true;
}
set_value(pos.x);
float sgn_x = drag_node_speed.x < 0 ? -1 : 1;
float val_x = Math::abs(drag_node_speed.x);
val_x -= 1000 * get_physics_process_delta_time();
if (val_x < 0) {
turnoff = true;
}
drag_node_speed.x = sgn_x * val_x;
} else {
if (pos.y < 0) {
pos.y = 0;
turnoff = true;
}
if (pos.y > (get_max() - get_page())) {
pos.y = get_max() - get_page();
turnoff = true;
}
set_value(pos.y);
float sgn_y = drag_node_speed.y < 0 ? -1 : 1;
float val_y = Math::abs(drag_node_speed.y);
val_y -= 1000 * get_physics_process_delta_time();
if (val_y < 0) {
turnoff = true;
}
drag_node_speed.y = sgn_y * val_y;
}
if (turnoff) {
set_physics_process_internal(false);
drag_node_touching = false;
drag_node_touching_deaccel = false;
}
} else {
if (time_since_motion == 0 || time_since_motion > 0.1) {
Vector2 diff = drag_node_accum - last_drag_node_accum;
last_drag_node_accum = drag_node_accum;
drag_node_speed = diff / get_physics_process_delta_time();
}
time_since_motion += get_physics_process_delta_time();
}
}
}
if (p_what == NOTIFICATION_MOUSE_EXIT) {
highlight = HIGHLIGHT_NONE;
update();
}
}
double ScrollBar::get_grabber_min_size() const {
Ref<StyleBox> grabber = get_stylebox("grabber");
Size2 gminsize = grabber->get_minimum_size() + grabber->get_center_size();
return (orientation == VERTICAL) ? gminsize.height : gminsize.width;
}
double ScrollBar::get_grabber_size() const {
float range = get_max() - get_min();
if (range <= 0)
return 0;
float page = (get_page() > 0) ? get_page() : 0;
/*
if (grabber_range < get_step())
grabber_range=get_step();
*/
double area_size = get_area_size();
double grabber_size = page / range * area_size;
return grabber_size + get_grabber_min_size();
}
double ScrollBar::get_area_size() const {
switch (orientation) {
case VERTICAL: {
double area = get_size().height;
area -= get_stylebox("scroll")->get_minimum_size().height;
area -= get_icon("increment")->get_height();
area -= get_icon("decrement")->get_height();
area -= get_grabber_min_size();
return area;
} break;
case HORIZONTAL: {
double area = get_size().width;
area -= get_stylebox("scroll")->get_minimum_size().width;
area -= get_icon("increment")->get_width();
area -= get_icon("decrement")->get_width();
area -= get_grabber_min_size();
return area;
} break;
default: {
return 0.0;
}
}
}
double ScrollBar::get_area_offset() const {
double ofs = 0;
if (orientation == VERTICAL) {
ofs += get_stylebox("hscroll")->get_margin(MARGIN_TOP);
ofs += get_icon("decrement")->get_height();
}
if (orientation == HORIZONTAL) {
ofs += get_stylebox("hscroll")->get_margin(MARGIN_LEFT);
ofs += get_icon("decrement")->get_width();
}
return ofs;
}
double ScrollBar::get_click_pos(const Point2 &p_pos) const {
float pos = (orientation == VERTICAL) ? p_pos.y : p_pos.x;
pos -= get_area_offset();
float area = get_area_size();
if (area == 0)
return 0;
else
return pos / area;
}
double ScrollBar::get_grabber_offset() const {
return (get_area_size()) * get_as_ratio();
}
Size2 ScrollBar::get_minimum_size() const {
Ref<Texture2D> incr = get_icon("increment");
Ref<Texture2D> decr = get_icon("decrement");
Ref<StyleBox> bg = get_stylebox("scroll");
Size2 minsize;
if (orientation == VERTICAL) {
minsize.width = MAX(incr->get_size().width, (bg->get_minimum_size() + bg->get_center_size()).width);
minsize.height += incr->get_size().height;
minsize.height += decr->get_size().height;
minsize.height += bg->get_minimum_size().height;
minsize.height += get_grabber_min_size();
}
if (orientation == HORIZONTAL) {
minsize.height = MAX(incr->get_size().height, (bg->get_center_size() + bg->get_minimum_size()).height);
minsize.width += incr->get_size().width;
minsize.width += decr->get_size().width;
minsize.width += bg->get_minimum_size().width;
minsize.width += get_grabber_min_size();
}
return minsize;
}
void ScrollBar::set_custom_step(float p_custom_step) {
custom_step = p_custom_step;
}
float ScrollBar::get_custom_step() const {
return custom_step;
}
void ScrollBar::_drag_node_exit() {
if (drag_node) {
drag_node->disconnect_compat("gui_input", this, "_drag_node_input");
}
drag_node = NULL;
}
void ScrollBar::_drag_node_input(const Ref<InputEvent> &p_input) {
Ref<InputEventMouseButton> mb = p_input;
if (mb.is_valid()) {
if (mb->get_button_index() != 1)
return;
if (mb->is_pressed()) {
drag_node_speed = Vector2();
drag_node_accum = Vector2();
last_drag_node_accum = Vector2();
drag_node_from = Vector2(orientation == HORIZONTAL ? get_value() : 0, orientation == VERTICAL ? get_value() : 0);
drag_node_touching = OS::get_singleton()->has_touchscreen_ui_hint();
drag_node_touching_deaccel = false;
time_since_motion = 0;
if (drag_node_touching) {
set_physics_process_internal(true);
time_since_motion = 0;
}
} else {
if (drag_node_touching) {
if (drag_node_speed == Vector2()) {
drag_node_touching_deaccel = false;
drag_node_touching = false;
set_physics_process_internal(false);
} else {
drag_node_touching_deaccel = true;
}
}
}
}
Ref<InputEventMouseMotion> mm = p_input;
if (mm.is_valid()) {
if (drag_node_touching && !drag_node_touching_deaccel) {
Vector2 motion = Vector2(mm->get_relative().x, mm->get_relative().y);
drag_node_accum -= motion;
Vector2 diff = drag_node_from + drag_node_accum;
if (orientation == HORIZONTAL)
set_value(diff.x);
if (orientation == VERTICAL)
set_value(diff.y);
time_since_motion = 0;
}
}
}
void ScrollBar::set_drag_node(const NodePath &p_path) {
if (is_inside_tree()) {
if (drag_node) {
drag_node->disconnect_compat("gui_input", this, "_drag_node_input");
drag_node->disconnect_compat("tree_exiting", this, "_drag_node_exit");
}
}
drag_node = NULL;
drag_node_path = p_path;
if (is_inside_tree()) {
if (has_node(p_path)) {
Node *n = get_node(p_path);
drag_node = Object::cast_to<Control>(n);
}
if (drag_node) {
drag_node->connect_compat("gui_input", this, "_drag_node_input");
drag_node->connect_compat("tree_exiting", this, "_drag_node_exit", varray(), CONNECT_ONESHOT);
}
}
}
NodePath ScrollBar::get_drag_node() const {
return drag_node_path;
}
void ScrollBar::set_smooth_scroll_enabled(bool p_enable) {
smooth_scroll_enabled = p_enable;
}
bool ScrollBar::is_smooth_scroll_enabled() const {
return smooth_scroll_enabled;
}
void ScrollBar::_bind_methods() {
ClassDB::bind_method(D_METHOD("_gui_input"), &ScrollBar::_gui_input);
ClassDB::bind_method(D_METHOD("set_custom_step", "step"), &ScrollBar::set_custom_step);
ClassDB::bind_method(D_METHOD("get_custom_step"), &ScrollBar::get_custom_step);
ClassDB::bind_method(D_METHOD("_drag_node_input"), &ScrollBar::_drag_node_input);
ClassDB::bind_method(D_METHOD("_drag_node_exit"), &ScrollBar::_drag_node_exit);
ADD_SIGNAL(MethodInfo("scrolling"));
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "custom_step", PROPERTY_HINT_RANGE, "-1,4096"), "set_custom_step", "get_custom_step");
}
ScrollBar::ScrollBar(Orientation p_orientation) {
orientation = p_orientation;
highlight = HIGHLIGHT_NONE;
custom_step = -1;
drag_node = NULL;
drag.active = false;
drag_node_speed = Vector2();
drag_node_touching = false;
drag_node_touching_deaccel = false;
scrolling = false;
target_scroll = 0;
smooth_scroll_enabled = false;
if (focus_by_default)
set_focus_mode(FOCUS_ALL);
set_step(0);
}
ScrollBar::~ScrollBar() {
}
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