Add a slider to handle zoom

scene/gui/graph_edit.cpp

@@ -1,6 +1,7 @@
 #include "graph_edit.h"
 #include "os/input.h"
 #include "os/keyboard.h"
+#include "scene/gui/box_container.h"
 bool GraphEditFilter::has_point(const Point2& p_point) const {
 
 	return ge->_filter_input(p_point);
@@ -185,6 +186,8 @@ void GraphEdit::_notification(int p_what) {
 		h_scroll->set_anchor_and_margin(MARGIN_TOP,ANCHOR_END,hmin.height);
 		h_scroll->set_anchor_and_margin(MARGIN_BOTTOM,ANCHOR_END,0);
 
+		zoom_icon->set_texture( get_icon("Zoom", "EditorIcons"));
+
 	}
 	if (p_what==NOTIFICATION_DRAW) {
 		VS::get_singleton()->canvas_item_set_clip(get_canvas_item(),true);
@@ -687,11 +690,11 @@ void GraphEdit::_input_event(const InputEvent& p_ev) {
 		}
 
 		if (b.button_index==BUTTON_WHEEL_UP && b.pressed) {
-			set_zoom(zoom/0.9);
+			sl_zoom->set_val(zoom/0.9);
 		}
 
 		if (b.button_index==BUTTON_WHEEL_DOWN && b.pressed) {
-			set_zoom(zoom*0.9);
+			sl_zoom->set_val(zoom*0.9);
 		}
 	}
 
@@ -826,4 +829,19 @@ GraphEdit::GraphEdit() {
 	v_scroll->connect("value_changed", this,"_scroll_moved");
 
 	zoom = 1;
+
+	HBoxContainer* tools = memnew( HBoxContainer );
+	add_child(tools);
+
+	zoom_icon = memnew( TextureFrame );
+	tools->add_child(zoom_icon);
+
+	sl_zoom = memnew( HSlider );
+	sl_zoom->set_min(0.01);
+	sl_zoom->set_max(4);
+	sl_zoom->set_val(1);
+	sl_zoom->set_step(0.01);
+	sl_zoom->connect("value_changed", this, "set_zoom");
+	tools->add_child(sl_zoom);
+	sl_zoom->set_custom_minimum_size(Size2(200,0));
 }

scene/gui/graph_edit.h

@@ -3,7 +3,8 @@
 
 #include "scene/gui/graph_node.h"
 #include "scene/gui/scroll_bar.h"
-
+#include "scene/gui/slider.h"
+#include "texture_frame.h"
 class GraphEdit;
 
 class GraphEditFilter : public Control {
@@ -34,6 +35,8 @@ public:
 	};
 private:
 
+	TextureFrame* zoom_icon;
+	HSlider* sl_zoom;
 	HScrollBar* h_scroll;
 	VScrollBar* v_scroll;