Add scrolling to Tree control in Drag and Drop mode
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3 changed files with 36 additions and 0 deletions
scene
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@ -32,6 +32,7 @@
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#include "os/keyboard.h"
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#include "globals.h"
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#include "os/input.h"
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#include "scene/main/viewport.h"
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@ -829,6 +830,8 @@ void Tree::update_cache() {
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cache.guide_width=get_constant("guide_width");
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cache.draw_relationship_lines=get_constant("draw_relationship_lines");
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cache.relationship_line_color=get_color("relationship_line_color");
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cache.scroll_border=get_constant("scroll_border");
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cache.scroll_speed=get_constant("scroll_speed");
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cache.title_button = get_stylebox("title_button_normal");
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cache.title_button_pressed = get_stylebox("title_button_pressed");
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@ -2681,11 +2684,17 @@ void Tree::_notification(int p_what) {
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if (p_what==NOTIFICATION_DRAG_END) {
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drop_mode_flags=0;
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scrolling = false;
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set_fixed_process(false);
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update();
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}
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if (p_what==NOTIFICATION_DRAG_BEGIN) {
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single_select_defer=NULL;
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if (cache.scroll_speed > 0 && get_rect().has_point(get_viewport()->get_mouse_pos() - get_global_pos())) {
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scrolling = true;
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set_fixed_process(true);
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}
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}
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if (p_what==NOTIFICATION_FIXED_PROCESS) {
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@ -2731,6 +2740,28 @@ void Tree::_notification(int p_what) {
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}
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}
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if (scrolling) {
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Point2 point = get_viewport()->get_mouse_pos() - get_global_pos();
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if (point.x < cache.scroll_border) {
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point.x -= cache.scroll_border;
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} else if (point.x > get_size().width - cache.scroll_border) {
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point.x -= get_size().width - cache.scroll_border;
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} else {
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point.x = 0;
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}
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if (point.y < cache.scroll_border) {
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point.y -= cache.scroll_border;
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} else if (point.y > get_size().height - cache.scroll_border) {
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point.y -= get_size().height - cache.scroll_border;
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} else {
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point.y = 0;
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}
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point *= cache.scroll_speed * get_fixed_process_delta_time();
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point += get_scroll();
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h_scroll->set_val(point.x);
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v_scroll->set_val(point.y);
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}
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}
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if (p_what==NOTIFICATION_DRAW) {
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@ -390,6 +390,8 @@ friend class TreeItem;
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int button_margin;
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Point2 offset;
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int draw_relationship_lines;
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int scroll_border;
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int scroll_speed;
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enum ClickType {
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CLICK_NONE,
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@ -448,6 +450,7 @@ friend class TreeItem;
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bool drag_touching_deaccel;
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bool click_handled;
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bool allow_rmb_select;
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bool scrolling;
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bool force_select_on_already_selected;
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@ -714,6 +714,8 @@ void fill_default_theme(Ref<Theme>& t, const Ref<Font> & default_font, const Ref
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t->set_constant("item_margin","Tree",12 *scale);
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t->set_constant("button_margin","Tree",4 *scale);
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t->set_constant("draw_relationship_lines", "Tree", 0);
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t->set_constant("scroll_border", "Tree", 4);
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t->set_constant("scroll_speed", "Tree", 12);
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// ItemList
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