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virtualx-engine/scene/gui/scroll_container.cpp
Juan Linietsky 8f84f4117c -Fixed a bug in scrollcontainer not respecting expand flag 
If you relied on this, make sure the children of your scrollcontainer
is set to expand with the expand flag in either vertical or horizontal axis
2015-10-25 20:08:18 -03:00

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/*************************************************************************/
/* scroll_container.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2015 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 {
return Size2(1, 1);
};
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::_input_event(const InputEvent& p_input_event) {
switch(p_input_event.type) {
case InputEvent::MOUSE_BUTTON: {
const InputEventMouseButton &mb=p_input_event.mouse_button;
if (mb.button_index==BUTTON_WHEEL_UP && mb.pressed && v_scroll->is_visible()) {
v_scroll->set_val( v_scroll->get_val()-v_scroll->get_page()/8 );
}
if (mb.button_index==BUTTON_WHEEL_DOWN && mb.pressed && v_scroll->is_visible()) {
v_scroll->set_val( v_scroll->get_val()+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_val(),v_scroll->get_val());
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_input_event.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_val(diff.x);
else
drag_accum.x=0;
if (scroll_v)
v_scroll->set_val(diff.y);
else
drag_accum.y=0;
time_since_motion=0;
}
} break;
}
}
void ScrollContainer::_update_scrollbar_pos() {
Size2 size = get_size();
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();
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) {
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) {
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();
VisualServer::get_singleton()->canvas_item_set_clip(get_canvas_item(),true);
}
if (p_what==NOTIFICATION_FIXED_PROCESS) {
if (drag_touching) {
if (drag_touching_deaccel) {
Vector2 pos = Vector2(h_scroll->get_val(),v_scroll->get_val());
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_val(pos.x);
if (scroll_v)
v_scroll->set_val(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_val();
}
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_val();
}
}
void ScrollContainer::_scroll_moved(float) {
scroll.x=h_scroll->get_val();
scroll.y=v_scroll->get_val();
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_val();
}
void ScrollContainer::set_v_scroll(int p_pos) {
v_scroll->set_val(p_pos);
_cancel_drag();
}
int ScrollContainer::get_h_scroll() const {
return h_scroll->get_val();
}
void ScrollContainer::set_h_scroll(int p_pos) {
h_scroll->set_val(p_pos);
_cancel_drag();
}
void ScrollContainer::_bind_methods() {
ObjectTypeDB::bind_method(_MD("_scroll_moved"),&ScrollContainer::_scroll_moved);
ObjectTypeDB::bind_method(_MD("_input_event"),&ScrollContainer::_input_event);
ObjectTypeDB::bind_method(_MD("set_enable_h_scroll","enable"),&ScrollContainer::set_enable_h_scroll);
ObjectTypeDB::bind_method(_MD("is_h_scroll_enabled"),&ScrollContainer::is_h_scroll_enabled);
ObjectTypeDB::bind_method(_MD("set_enable_v_scroll","enable"),&ScrollContainer::set_enable_v_scroll);
ObjectTypeDB::bind_method(_MD("is_v_scroll_enabled"),&ScrollContainer::is_v_scroll_enabled);
ObjectTypeDB::bind_method(_MD("_update_scrollbar_pos"),&ScrollContainer::_update_scrollbar_pos);
ObjectTypeDB::bind_method(_MD("set_h_scroll","val"),&ScrollContainer::set_h_scroll);
ObjectTypeDB::bind_method(_MD("get_h_scroll"),&ScrollContainer::get_h_scroll);
ObjectTypeDB::bind_method(_MD("set_v_scroll","val"),&ScrollContainer::set_v_scroll);
ObjectTypeDB::bind_method(_MD("get_v_scroll"),&ScrollContainer::get_v_scroll);
ADD_PROPERTY( PropertyInfo( Variant::BOOL, "scroll/horizontal"), _SCS("set_enable_h_scroll"),_SCS("is_h_scroll_enabled"));
ADD_PROPERTY( PropertyInfo( Variant::BOOL, "scroll/vertical"), _SCS("set_enable_v_scroll"),_SCS("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;
};
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