Implements filtering in bindings editor

3 files changed, 126 insertions, 0 deletions

diff --git a/libs/gtkmm2ext/gtkmm2ext/searchbar.h b/libs/gtkmm2ext/gtkmm2ext/searchbar.h
new file mode 100644
index 0000000000..5096ed53f9
--- /dev/null
+++ b/libs/gtkmm2ext/gtkmm2ext/searchbar.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <gtkmm/entry.h>
+#include <string>
+
+namespace Gtkmm2ext {
+
+class SearchBar : public Gtk::Entry
+{
+public:
+	SearchBar(const std::string& placeholder_text = "Search...", bool icon_click_resets = true);
+
+	void reset ();
+	// emitted when the filter has been updated
+	sigc::signal<void, const std::string&> signal_search_string_updated () { return sig_search_string_updated; }
+protected:
+	bool focus_in_event (GdkEventFocus*);
+	bool focus_out_event (GdkEventFocus*);
+
+	bool key_press_event (GdkEventKey*);
+	void icon_clicked_event (Gtk::EntryIconPosition, const GdkEventButton*);
+
+	const std::string placeholder_text;
+	sigc::signal<void, const std::string&> sig_search_string_updated;
+private:
+	void search_string_changed () const;
+
+	Glib::RefPtr<Gdk::Pixbuf> icon;
+	bool icon_click_resets;
+};
+
+}
diff --git a/libs/gtkmm2ext/searchbar.cc b/libs/gtkmm2ext/searchbar.cc
new file mode 100644
index 0000000000..75915c1f2e
--- /dev/null
+++ b/libs/gtkmm2ext/searchbar.cc
@@ -0,0 +1,93 @@
+#include "gtkmm2ext/searchbar.h"
+#include "gtkmm2ext/keyboard.h"
+#include <iostream>
+
+namespace Gtkmm2ext {
+
+SearchBar::SearchBar (const std::string& label, bool icon_resets)
+	: placeholder_text (label)
+	, icon_click_resets (icon_resets)
+{
+	set_text (placeholder_text);
+	set_alignment (Gtk::ALIGN_CENTER);
+	signal_key_press_event().connect (sigc::mem_fun (*this, &SearchBar::key_press_event));
+	signal_focus_in_event().connect (sigc::mem_fun (*this, &SearchBar::focus_in_event));
+	signal_focus_out_event().connect (sigc::mem_fun (*this, &SearchBar::focus_out_event));
+	signal_changed().connect (sigc::mem_fun (*this, &SearchBar::search_string_changed));
+	signal_icon_release().connect (sigc::mem_fun (*this, &SearchBar::icon_clicked_event));
+}
+
+bool
+SearchBar::focus_in_event (GdkEventFocus*)
+{
+	if (get_text ().compare (placeholder_text) == 0) {
+		set_text ("");
+	}
+
+	icon = get_icon_pixbuf ();
+	if (icon) {
+		set_icon_from_pixbuf (Glib::RefPtr<Gdk::Pixbuf> ());
+	}
+	return true;
+}
+
+bool
+SearchBar::focus_out_event (GdkEventFocus*)
+{
+	if (get_text ().empty ()) {
+		set_text (placeholder_text);
+	}
+
+	if (icon) {
+		set_icon_from_pixbuf (icon);
+		icon.reset ();
+	}
+
+	search_string_changed ();
+	return false;
+}
+
+bool
+SearchBar::key_press_event (GdkEventKey* ev)
+{
+	switch (ev->keyval) {
+	case GDK_Escape: 
+		set_text (placeholder_text);
+		return true;
+	default:
+		break;
+	}
+
+	return false;
+}
+
+void
+SearchBar::icon_clicked_event (Gtk::EntryIconPosition, const GdkEventButton*)
+{
+		if (icon_click_resets) {
+			reset ();
+		}
+		else {
+			search_string_changed ();
+		}
+}
+
+void
+SearchBar::search_string_changed () const
+{
+	const std::string& text = get_text ();
+	if (text.empty() || text.compare (placeholder_text) == 0) {
+		sig_search_string_updated ("");
+		return;
+	}
+	sig_search_string_updated (text);
+}
+
+void
+SearchBar::reset ()
+{
+	set_text (placeholder_text);
+	search_string_changed ();
+}
+
+}
\ No newline at end of file
diff --git a/libs/gtkmm2ext/wscript b/libs/gtkmm2ext/wscript
index 0c8f454128..b5676d1423 100644
--- a/libs/gtkmm2ext/wscript
+++ b/libs/gtkmm2ext/wscript
@@ -57,6 +57,7 @@ gtkmm2ext_sources = [
         'popup.cc',
         'prompter.cc',
         'scroomer.cc',
+        'searchbar.cc',
         'selector.cc',
         'slider_controller.cc',
         'stateful_button.cc',