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godot/scene/gui/scroll_bar.cpp
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

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/*************************************************************************/
/* scroll_bar.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_bar.h"
#include "os/keyboard.h"
#include "print_string.h"
#include "os/os.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::_input_event(InputEvent p_event) {
switch(p_event.type) {
case InputEvent::MOUSE_BUTTON: {
const InputEventMouseButton &b=p_event.mouse_button;
accept_event();
if (b.button_index==5 && b.pressed) {
//if (orientation==VERTICAL)
// set_val( get_val() + get_page() / 4.0 );
//else
set_val( get_val() + get_page() / 4.0 );
accept_event();
}
if (b.button_index==4 && b.pressed) {
//if (orientation==HORIZONTAL)
// set_val( get_val() - get_page() / 4.0 );
//else
set_val( get_val() - get_page() / 4.0 );
accept_event();
}
if (b.button_index!=1)
return;
if (b.pressed) {
double ofs = orientation==VERTICAL ? b.y : b.x ;
Ref<Texture> decr = get_icon("decrement");
Ref<Texture> 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_val( get_val() - (custom_step>=0?custom_step:get_step()) );
break;
}
if (ofs > total-incr_size ) {
set_val( get_val() + (custom_step>=0?custom_step:get_step()) );
break;
}
ofs-=decr_size;
if ( ofs < grabber_ofs ) {
set_val( get_val() - get_page() );
break;
}
ofs-=grabber_ofs;
if (ofs < grabber_size ) {
drag.active=true;
drag.pos_at_click=grabber_ofs+ofs;
drag.value_at_click=get_unit_value();
update();
} else {
set_val( get_val() + get_page() );
}
} else {
drag.active=false;
update();
}
} break;
case InputEvent::MOUSE_MOTION: {
const InputEventMouseMotion &m=p_event.mouse_motion;
accept_event();
if (drag.active) {
double ofs = orientation==VERTICAL ? m.y : m.x ;
Ref<Texture> 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_unit_value( drag.value_at_click + diff );
} else {
double ofs = orientation==VERTICAL ? m.y : m.x ;
Ref<Texture> decr = get_icon("decrement");
Ref<Texture> 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;
HiliteStatus new_hilite;
if (ofs < decr_size ) {
new_hilite=HILITE_DECR;
} else if (ofs > total-incr_size ) {
new_hilite=HILITE_INCR;
} else {
new_hilite=HILITE_RANGE;
}
if (new_hilite!=hilite) {
hilite=new_hilite;
update();
}
}
} break;
case InputEvent::KEY: {
const InputEventKey &k=p_event.key;
if (!k.pressed)
return;
switch (k.scancode) {
case KEY_LEFT: {
if (orientation!=HORIZONTAL)
return;
set_val( get_val() - (custom_step>=0?custom_step:get_step()) );
} break;
case KEY_RIGHT: {
if (orientation!=HORIZONTAL)
return;
set_val( get_val() + (custom_step>=0?custom_step:get_step()) );
} break;
case KEY_UP: {
if (orientation!=VERTICAL)
return;
set_val( get_val() - (custom_step>=0?custom_step:get_step()) );
} break;
case KEY_DOWN: {
if (orientation!=VERTICAL)
return;
set_val( get_val() + (custom_step>=0?custom_step:get_step()) );
} break;
case KEY_HOME: {
set_val( get_min() );
} break;
case KEY_END: {
set_val( get_max() );
} break;
} break;
}
}
}
void ScrollBar::_notification(int p_what) {
if (p_what==NOTIFICATION_DRAW) {
RID ci = get_canvas_item();
Ref<Texture> decr = hilite==HILITE_DECR ? get_icon("decrement_hilite") : get_icon("decrement");
Ref<Texture> incr = hilite==HILITE_INCR ? get_icon("increment_hilite") : get_icon("increment");
Ref<StyleBox> bg = has_focus() ? get_stylebox("scroll_focus") : get_stylebox("scroll");
Ref<StyleBox> grabber = (drag.active || hilite==HILITE_RANGE) ? get_stylebox("grabber_hilite") : get_stylebox("grabber");
Point2 ofs;
VisualServer *vs = VisualServer::get_singleton();
vs->canvas_item_add_texture_rect( ci, Rect2( Point2(), decr->get_size()),decr->get_rid() );
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;
vs->canvas_item_add_texture_rect( ci, Rect2( ofs, decr->get_size()),incr->get_rid() );
Rect2 grabber_rect;
if (orientation==HORIZONTAL) {
grabber_rect.size.width=get_grabber_size();
grabber_rect.size.height=get_size().height;
grabber_rect.pos.y=0;
grabber_rect.pos.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.pos.y=get_grabber_offset()+decr->get_height()+bg->get_margin( MARGIN_TOP );
grabber_rect.pos.x=0;
}
grabber->draw(ci,grabber_rect);
}
if (p_what==NOTIFICATION_ENTER_TREE) {
if (has_node(drag_slave_path)) {
Node *n = get_node(drag_slave_path);
drag_slave=n->cast_to<Control>();
}
if (drag_slave) {
drag_slave->connect("input_event",this,"_drag_slave_input");
drag_slave->connect("exit_tree",this,"_drag_slave_exit",varray(),CONNECT_ONESHOT);
}
}
if (p_what==NOTIFICATION_EXIT_TREE) {
if (drag_slave) {
drag_slave->disconnect("input_event",this,"_drag_slave_input");
drag_slave->disconnect("exit_tree",this,"_drag_slave_exit");
}
drag_slave=NULL;
}
if (p_what==NOTIFICATION_FIXED_PROCESS) {
if (drag_slave_touching) {
if (drag_slave_touching_deaccel) {
Vector2 pos = Vector2(orientation==HORIZONTAL?get_val():0,orientation==VERTICAL?get_val():0);
pos+=drag_slave_speed*get_fixed_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_val(pos.x);
float sgn_x = drag_slave_speed.x<0? -1 : 1;
float val_x = Math::abs(drag_slave_speed.x);
val_x-=1000*get_fixed_process_delta_time();
if (val_x<0) {
turnoff=true;
}
drag_slave_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_val(pos.y);
float sgn_y = drag_slave_speed.y<0? -1 : 1;
float val_y = Math::abs(drag_slave_speed.y);
val_y-=1000*get_fixed_process_delta_time();
if (val_y<0) {
turnoff=true;
}
drag_slave_speed.y=sgn_y*val_y;
}
if (turnoff) {
set_fixed_process(false);
drag_slave_touching=false;
drag_slave_touching_deaccel=false;
}
} else {
if (time_since_motion==0 || time_since_motion>0.1) {
Vector2 diff = drag_slave_accum - last_drag_slave_accum;
last_drag_slave_accum=drag_slave_accum;
drag_slave_speed=diff/get_fixed_process_delta_time();
}
time_since_motion+=get_fixed_process_delta_time();
}
}
}
if (p_what==NOTIFICATION_MOUSE_EXIT) {
hilite=HILITE_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 {
if (orientation==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;
} else if (orientation==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;
} else {
return 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_unit_value();
}
Size2 ScrollBar::get_minimum_size() const {
Ref<Texture> incr = get_icon("increment");
Ref<Texture> 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_slave_exit() {
if (drag_slave) {
drag_slave->disconnect("input_event",this,"_drag_slave_input");
}
drag_slave=NULL;
}
void ScrollBar::_drag_slave_input(const InputEvent& p_input) {
switch(p_input.type) {
case InputEvent::MOUSE_BUTTON: {
const InputEventMouseButton &mb=p_input.mouse_button;
if (mb.button_index!=1)
break;
if (mb.pressed) {
if (drag_slave_touching) {
set_fixed_process(false);
drag_slave_touching_deaccel=false;
drag_slave_touching=false;
drag_slave_speed=Vector2();
drag_slave_accum=Vector2();
last_drag_slave_accum=Vector2();
drag_slave_from=Vector2();
}
if (true) {
drag_slave_speed=Vector2();
drag_slave_accum=Vector2();
last_drag_slave_accum=Vector2();
//drag_slave_from=Vector2(h_scroll->get_val(),v_scroll->get_val());
drag_slave_from= Vector2(orientation==HORIZONTAL?get_val():0,orientation==VERTICAL?get_val():0);
drag_slave_touching=OS::get_singleton()->has_touchscreen_ui_hint();
drag_slave_touching_deaccel=false;
time_since_motion=0;
if (drag_slave_touching) {
set_fixed_process(true);
time_since_motion=0;
}
}
} else {
if (drag_slave_touching) {
if (drag_slave_speed==Vector2()) {
drag_slave_touching_deaccel=false;
drag_slave_touching=false;
set_fixed_process(false);
} else {
drag_slave_touching_deaccel=true;
}
}
}
} break;
case InputEvent::MOUSE_MOTION: {
const InputEventMouseMotion &mm=p_input.mouse_motion;
if (drag_slave_touching && ! drag_slave_touching_deaccel) {
Vector2 motion = Vector2(mm.relative_x,mm.relative_y);
drag_slave_accum-=motion;
Vector2 diff = drag_slave_from+drag_slave_accum;
if (orientation==HORIZONTAL)
set_val(diff.x);
//else
// drag_slave_accum.x=0;
if (orientation==VERTICAL)
set_val(diff.y);
//else
// drag_slave_accum.y=0;
time_since_motion=0;
}
} break;
}
}
void ScrollBar::set_drag_slave(const NodePath& p_path) {
if (is_inside_tree()) {
if (drag_slave) {
drag_slave->disconnect("input_event",this,"_drag_slave_input");
drag_slave->disconnect("exit_tree",this,"_drag_slave_exit");
}
}
drag_slave=NULL;
drag_slave_path=p_path;
if (is_inside_tree()) {
if (has_node(p_path)) {
Node *n = get_node(p_path);
drag_slave=n->cast_to<Control>();
}
if (drag_slave) {
drag_slave->connect("input_event",this,"_drag_slave_input");
drag_slave->connect("exit_tree",this,"_drag_slave_exit",varray(),CONNECT_ONESHOT);
}
}
}
NodePath ScrollBar::get_drag_slave() const{
return drag_slave_path;
}
#if 0
void ScrollBar::mouse_button(const Point2& p_pos, int b.button_index,bool b.pressed,int p_modifier_mask) {
// wheel!
if (b.button_index==BUTTON_WHEEL_UP && b.pressed) {
if (orientation==VERTICAL)
set_val( get_val() - get_page() / 4.0 );
else
set_val( get_val() + get_page() / 4.0 );
}
if (b.button_index==BUTTON_WHEEL_DOWN && b.pressed) {
if (orientation==HORIZONTAL)
set_val( get_val() - get_page() / 4.0 );
else
set_val( get_val() + get_page() / 4.0 );
}
if (b.button_index!=BUTTON_LEFT)
return;
if (b.pressed) {
int ofs = orientation==VERTICAL ? p_pos.y : p_pos.x ;
int grabber_ofs = get_grabber_offset();
int grabber_size = get_grabber_size();
if ( ofs < grabber_ofs ) {
set_val( get_val() - get_page() );
} else if (ofs > grabber_ofs + grabber_size ) {
set_val( get_val() + get_page() );
} else {
drag.active=true;
drag.pos_at_click=get_click_pos(p_pos);
drag.value_at_click=get_unit_value();
}
} else {
drag.active=false;
}
}
void ScrollBar::mouse_motion(const Point2& p_pos, const Point2& p_rel, int b.button_index_mask) {
if (!drag.active)
return;
double value_ofs=drag.value_at_click+(get_click_pos(p_pos)-drag.pos_at_click);
value_ofs=value_ofs*( get_max() - get_min() );
if (value_ofs<get_min())
value_ofs=get_min();
if (value_ofs>(get_max()-get_page()))
value_ofs=get_max()-get_page();
if (get_val()==value_ofs)
return; //dont bother if the value is the same
set_val( value_ofs );
}
bool ScrollBar::key(unsigned long p_unicode, unsigned long p_scan_code,bool b.pressed,bool p_repeat,int p_modifier_mask) {
if (!b.pressed)
return false;
switch (p_scan_code) {
case KEY_LEFT: {
if (orientation!=HORIZONTAL)
return false;
set_val( get_val() - get_step() );
} break;
case KEY_RIGHT: {
if (orientation!=HORIZONTAL)
return false;
set_val( get_val() + get_step() );
} break;
case KEY_UP: {
if (orientation!=VERTICAL)
return false;
set_val( get_val() - get_step() );
} break;
case KEY_DOWN: {
if (orientation!=VERTICAL)
return false;
set_val( get_val() + get_step() );
} break;
case KEY_HOME: {
set_val( get_min() );
} break;
case KEY_END: {
set_val( get_max() );
} break;
default:
return false;
}
return true;
}
#endif
void ScrollBar::_bind_methods() {
ObjectTypeDB::bind_method(_MD("_input_event"),&ScrollBar::_input_event);
ObjectTypeDB::bind_method(_MD("set_custom_step","step"),&ScrollBar::set_custom_step);
ObjectTypeDB::bind_method(_MD("get_custom_step"),&ScrollBar::get_custom_step);
ObjectTypeDB::bind_method(_MD("_drag_slave_input"),&ScrollBar::_drag_slave_input);
ObjectTypeDB::bind_method(_MD("_drag_slave_exit"),&ScrollBar::_drag_slave_exit);
ADD_PROPERTY( PropertyInfo(Variant::REAL,"custom_step",PROPERTY_HINT_RANGE,"-1,4096"), _SCS("set_custom_step"),_SCS("get_custom_step"));
}
ScrollBar::ScrollBar(Orientation p_orientation)
{
orientation=p_orientation;
hilite=HILITE_NONE;
custom_step=-1;
drag_slave=NULL;
drag.active=false;
drag_slave_speed=Vector2();
drag_slave_touching=false;
drag_slave_touching_deaccel=false;
if (focus_by_default)
set_focus_mode( FOCUS_ALL );
set_step(0);
}
ScrollBar::~ScrollBar()
{
}
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