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Add scrolling to Tree control in Drag and Drop mode

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This commit is contained in:
Pawel Kowal 2016-09-17 21:29:55 +02:00
parent c05ff0577f
commit 9e5aaa27bc
3 changed files with 36 additions and 0 deletions
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31
scene/gui/tree.cpp
View File

@ -32,6 +32,7 @@
#include "os/keyboard.h"
#include "globals.h"
#include "os/input.h"
#include "scene/main/viewport.h"
@ -829,6 +830,8 @@ void Tree::update_cache() {
cache.guide_width=get_constant("guide_width");
cache.draw_relationship_lines=get_constant("draw_relationship_lines");
cache.relationship_line_color=get_color("relationship_line_color");
cache.scroll_border=get_constant("scroll_border");
cache.scroll_speed=get_constant("scroll_speed");
cache.title_button = get_stylebox("title_button_normal");
cache.title_button_pressed = get_stylebox("title_button_pressed");
@ -2681,11 +2684,17 @@ void Tree::_notification(int p_what) {
if (p_what==NOTIFICATION_DRAG_END) {
drop_mode_flags=0;
scrolling = false;
set_fixed_process(false);
update();
}
if (p_what==NOTIFICATION_DRAG_BEGIN) {
single_select_defer=NULL;
if (cache.scroll_speed > 0 && get_rect().has_point(get_viewport()->get_mouse_pos() - get_global_pos())) {
scrolling = true;
set_fixed_process(true);
}
}
if (p_what==NOTIFICATION_FIXED_PROCESS) {
@ -2731,6 +2740,28 @@ void Tree::_notification(int p_what) {
}
}
if (scrolling) {
Point2 point = get_viewport()->get_mouse_pos() - get_global_pos();
if (point.x < cache.scroll_border) {
point.x -= cache.scroll_border;
} else if (point.x > get_size().width - cache.scroll_border) {
point.x -= get_size().width - cache.scroll_border;
} else {
point.x = 0;
}
if (point.y < cache.scroll_border) {
point.y -= cache.scroll_border;
} else if (point.y > get_size().height - cache.scroll_border) {
point.y -= get_size().height - cache.scroll_border;
} else {
point.y = 0;
}
point *= cache.scroll_speed * get_fixed_process_delta_time();
point += get_scroll();
h_scroll->set_val(point.x);
v_scroll->set_val(point.y);
}
}
if (p_what==NOTIFICATION_DRAW) {

3
scene/gui/tree.h
View File

@ -390,6 +390,8 @@ friend class TreeItem;
int button_margin;
Point2 offset;
int draw_relationship_lines;
int scroll_border;
int scroll_speed;
enum ClickType {
CLICK_NONE,
@ -448,6 +450,7 @@ friend class TreeItem;
bool drag_touching_deaccel;
bool click_handled;
bool allow_rmb_select;
bool scrolling;
bool force_select_on_already_selected;

2
scene/resources/default_theme/default_theme.cpp
View File

@ -714,6 +714,8 @@ void fill_default_theme(Ref<Theme>& t, const Ref<Font> & default_font, const Ref
t->set_constant("item_margin","Tree",12 *scale);
t->set_constant("button_margin","Tree",4 *scale);
t->set_constant("draw_relationship_lines", "Tree", 0);
t->set_constant("scroll_border", "Tree", 4);
t->set_constant("scroll_speed", "Tree", 12);
// ItemList