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Add option for a touch-friendly drag handle in SplitContainer

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This commit is contained in:
Anish Mishra
2025-06-01 19:06:51 +05:30
parent 64b09905c7
commit bccf36b27b
6 changed files with 122 additions and 2 deletions
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90
scene/gui/split_container.cpp
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@@ -30,6 +30,7 @@
#include "split_container.h"
#include "scene/gui/texture_rect.h"
#include "scene/main/viewport.h"
#include "scene/theme/theme_db.h"
@@ -161,7 +162,7 @@ void SplitContainerDragger::_notification(int p_what) {
case NOTIFICATION_DRAW: {
SplitContainer *sc = Object::cast_to<SplitContainer>(get_parent());
draw_style_box(sc->theme_cache.split_bar_background, split_bar_rect);
if (sc->dragger_visibility == sc->DRAGGER_VISIBLE && (dragging || mouse_inside || !sc->theme_cache.autohide)) {
if (sc->dragger_visibility == sc->DRAGGER_VISIBLE && (dragging || mouse_inside || !sc->theme_cache.autohide) && !sc->touch_dragger_enabled) {
Ref<Texture2D> tex = sc->_get_grabber_icon();
float available_size = sc->vertical ? (sc->get_size().x - tex->get_size().x) : (sc->get_size().y - tex->get_size().y);
if (available_size - sc->drag_area_margin_begin - sc->drag_area_margin_end > 0) { // Draw the grabber only if it fits.
@@ -208,10 +209,26 @@ Ref<Texture2D> SplitContainer::_get_grabber_icon() const {
}
}
Ref<Texture2D> SplitContainer::_get_touch_dragger_icon() const {
if (is_fixed) {
return theme_cache.touch_dragger_icon;
} else {
if (vertical) {
return theme_cache.touch_dragger_icon_v;
} else {
return theme_cache.touch_dragger_icon_h;
}
}
}
int SplitContainer::_get_separation() const {
if (dragger_visibility == DRAGGER_HIDDEN_COLLAPSED) {
return 0;
}
if (touch_dragger_enabled) {
return theme_cache.separation;
}
// DRAGGER_VISIBLE or DRAGGER_HIDDEN.
Ref<Texture2D> g = _get_grabber_icon();
return MAX(theme_cache.separation, vertical ? g->get_height() : g->get_width());
@@ -267,6 +284,9 @@ void SplitContainer::_resort() {
return;
}
dragging_area_control->set_visible(!collapsed);
if (touch_dragger_enabled) {
touch_dragger->set_visible(dragging_enabled);
}
_compute_split_offset(false); // This recalculates and sets computed_split_offset.
@@ -406,7 +426,15 @@ bool SplitContainer::is_collapsed() const {
void SplitContainer::set_vertical(bool p_vertical) {
ERR_FAIL_COND_MSG(is_fixed, "Can't change orientation of " + get_class() + ".");
if (vertical == p_vertical) {
return;
}
vertical = p_vertical;
if (touch_dragger) {
touch_dragger->set_texture(_get_touch_dragger_icon());
touch_dragger->set_anchors_and_offsets_preset(Control::PRESET_CENTER);
touch_dragger->set_default_cursor_shape(vertical ? CURSOR_VSPLIT : CURSOR_HSPLIT);
}
update_minimum_size();
_resort();
}
@@ -504,6 +532,59 @@ bool SplitContainer::is_show_drag_area_enabled() const {
return show_drag_area;
}
void SplitContainer::set_touch_dragger_enabled(bool p_enabled) {
if (touch_dragger_enabled == p_enabled) {
return;
}
touch_dragger_enabled = p_enabled;
if (p_enabled) {
touch_dragger = memnew(TextureRect);
touch_dragger->set_texture(_get_touch_dragger_icon());
touch_dragger->set_anchors_and_offsets_preset(Control::PRESET_CENTER);
touch_dragger->set_default_cursor_shape(vertical ? CURSOR_VSPLIT : CURSOR_HSPLIT);
touch_dragger->set_modulate(Color(1, 1, 1, 0.3));
touch_dragger->connect(SceneStringName(gui_input), callable_mp(this, &SplitContainer::_touch_dragger_gui_input));
touch_dragger->connect(SceneStringName(mouse_exited), callable_mp(this, &SplitContainer::_touch_dragger_mouse_exited));
dragging_area_control->add_child(touch_dragger, false, Node::INTERNAL_MODE_FRONT);
} else {
if (touch_dragger) {
touch_dragger->queue_free();
touch_dragger = nullptr;
}
}
dragging_area_control->queue_redraw();
}
bool SplitContainer::is_touch_dragger_enabled() const {
return touch_dragger_enabled;
}
void SplitContainer::_touch_dragger_mouse_exited() {
if (!dragging_area_control->dragging) {
touch_dragger->set_modulate(Color(1, 1, 1, 0.3));
}
}
void SplitContainer::_touch_dragger_gui_input(const Ref<InputEvent> &p_event) {
if (!touch_dragger_enabled) {
return;
}
Ref<InputEventMouseMotion> mm = p_event;
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT) {
if (mb->is_pressed()) {
touch_dragger->set_modulate(Color(1, 1, 1, 1));
} else {
touch_dragger->set_modulate(Color(1, 1, 1, 0.3));
}
}
if (mm.is_valid() && !dragging_area_control->dragging) {
touch_dragger->set_modulate(Color(1, 1, 1, 0.6));
}
}
void SplitContainer::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_split_offset", "offset"), &SplitContainer::set_split_offset);
ClassDB::bind_method(D_METHOD("get_split_offset"), &SplitContainer::get_split_offset);
@@ -535,6 +616,9 @@ void SplitContainer::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_drag_area_control"), &SplitContainer::get_drag_area_control);
ClassDB::bind_method(D_METHOD("set_touch_dragger_enabled", "enabled"), &SplitContainer::set_touch_dragger_enabled);
ClassDB::bind_method(D_METHOD("is_touch_dragger_enabled"), &SplitContainer::is_touch_dragger_enabled);
ADD_SIGNAL(MethodInfo("dragged", PropertyInfo(Variant::INT, "offset")));
ADD_SIGNAL(MethodInfo("drag_started"));
ADD_SIGNAL(MethodInfo("drag_ended"));
@@ -544,6 +628,7 @@ void SplitContainer::_bind_methods() {
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "dragging_enabled"), "set_dragging_enabled", "is_dragging_enabled");
ADD_PROPERTY(PropertyInfo(Variant::INT, "dragger_visibility", PROPERTY_HINT_ENUM, "Visible,Hidden,Hidden and Collapsed"), "set_dragger_visibility", "get_dragger_visibility");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "vertical"), "set_vertical", "is_vertical");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "touch_dragger_enabled"), "set_touch_dragger_enabled", "is_touch_dragger_enabled");
ADD_GROUP("Drag Area", "drag_area_");
ADD_PROPERTY(PropertyInfo(Variant::INT, "drag_area_margin_begin", PROPERTY_HINT_NONE, "suffix:px"), "set_drag_area_margin_begin", "get_drag_area_margin_begin");
@@ -558,6 +643,9 @@ void SplitContainer::_bind_methods() {
BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, SplitContainer, separation);
BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, SplitContainer, minimum_grab_thickness);
BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, SplitContainer, autohide);
BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_ICON, SplitContainer, touch_dragger_icon, "touch_dragger");
BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_ICON, SplitContainer, touch_dragger_icon_h, "h_touch_dragger");
BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_ICON, SplitContainer, touch_dragger_icon_v, "v_touch_dragger");
BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_ICON, SplitContainer, grabber_icon, "grabber");
BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_ICON, SplitContainer, grabber_icon_h, "h_grabber");
BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_ICON, SplitContainer, grabber_icon_v, "v_grabber");