Add keyboard shortcut and setting to increase text size (fixes #978)add-kbd-shortcut-to-zoom-text

	* Can zoom in / out or reset zoom levels via shortcuts
	* Can change zoom value via global preferences window

2 files changed, 35 insertions, 4 deletions

diff --git a/main/src/ui/application.vala b/main/src/ui/application.vala
index 2e785224..1a2c93ff 100644
--- a/main/src/ui/application.vala
+++ b/main/src/ui/application.vala
@@ -10,6 +10,9 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
     private const string[] KEY_COMBINATION_ADD_CONFERENCE = {"<Ctrl>G", null};
     private const string[] KEY_COMBINATION_LOOP_CONVERSATIONS = {"<Ctrl>Tab", null};
     private const string[] KEY_COMBINATION_LOOP_CONVERSATIONS_REV = {"<Ctrl><Shift>Tab", null};
+    private const string[] KEY_COMBINATION_ZOOM_IN = {"<Ctrl>KP_Add", "<Ctrl>plus", null};
+    private const string[] KEY_COMBINATION_ZOOM_OUT = {"<Ctrl>KP_Subtract","<Ctrl>minus", null};
+    private const string[] KEY_COMBINATION_ZOOM_RESET = {"<Ctrl>0", "<Ctrl>KP_0", null};
 
     private MainWindow window;
     public MainWindowController controller;
@@ -32,10 +35,8 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
         init();
         Environment.set_application_name("Dino");
         Window.set_default_icon_name("im.dino.Dino");
-
         create_actions();
         add_main_option_entries(options);
-
         startup.connect(() => {
             if (print_version) {
                 print(@"Dino $(Dino.get_version())\n");
@@ -79,6 +80,7 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
                 if ((get_flags() & ApplicationFlags.IS_SERVICE) == ApplicationFlags.IS_SERVICE) window.hide_on_close = true;
             }
             window.present();
+            Util.force_css(window, "* { font-size: " + settings.zoom_level.to_string() + "% ;} " ); 
         });
     }
 
@@ -111,7 +113,12 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
                 break;
         }
     }
-
+    
+    private void set_zoom(int step){
+       if (step == 0) settings.zoom_level = 100; else settings.zoom_level += step;
+       Util.force_css(window, "* { font-size: " + settings.zoom_level.to_string() + "% ;} " ); 
+    }
+    
     private void create_actions() {
         SimpleAction accounts_action = new SimpleAction("accounts", null);
         accounts_action.activate.connect(show_accounts_window);
@@ -146,6 +153,23 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
         });
         add_action(deny_subscription_action);
 
+        
+        SimpleAction zoom_in_action = new SimpleAction("zoom_in", null);
+        zoom_in_action.activate.connect(() => { set_zoom(+5); } );
+        add_action(zoom_in_action);
+        set_accels_for_action("app.zoom_in", KEY_COMBINATION_ZOOM_IN);
+        
+        SimpleAction zoom_out_action = new SimpleAction("zoom_out", null);
+        zoom_out_action.activate.connect(() => { set_zoom(-5); } );
+        add_action(zoom_out_action);
+        set_accels_for_action("app.zoom_out", KEY_COMBINATION_ZOOM_OUT);
+        
+        SimpleAction zoom_reset_action = new SimpleAction("zoom_reset", null);
+        zoom_reset_action.activate.connect(() => { set_zoom(0); } );
+        add_action(zoom_reset_action);
+        set_accels_for_action("app.zoom_reset", KEY_COMBINATION_ZOOM_RESET);
+
+
         SimpleAction contacts_action = new SimpleAction("add_chat", null);
         contacts_action.activate.connect(() => {
             AddChatDialog add_chat_dialog = new AddChatDialog(stream_interactor, stream_interactor.get_accounts());
@@ -244,6 +268,9 @@ public class Dino.Ui.Application : Adw.Application, Dino.Application {
     private void show_settings_window() {
         SettingsDialog dialog = new SettingsDialog();
         dialog.set_transient_for(get_active_window());
+        dialog.zoom_spinbutton_config.value_changed.connect( () => {
+            Util.force_css(window, "* { font-size: " + settings.zoom_level.to_string() + "% ;} " ); 
+        });
         dialog.present();
     }
 
diff --git a/main/src/ui/settings_dialog.vala b/main/src/ui/settings_dialog.vala
index 3635879c..c4890a86 100644
--- a/main/src/ui/settings_dialog.vala
+++ b/main/src/ui/settings_dialog.vala
@@ -5,13 +5,14 @@ namespace Dino.Ui {
 [GtkTemplate (ui = "/im/dino/Dino/settings_dialog.ui")]
 class SettingsDialog : Adw.PreferencesWindow {
 
+    [GtkChild] private unowned SpinButton zoom_spinbutton;
     [GtkChild] private unowned Switch typing_switch;
     [GtkChild] private unowned Switch marker_switch;
     [GtkChild] private unowned Switch notification_switch;
     [GtkChild] private unowned Switch emoji_switch;
 
     Dino.Entities.Settings settings = Dino.Application.get_default().settings;
-
+    public Adjustment zoom_spinbutton_config;
     public SettingsDialog() {
         Object();
 
@@ -19,11 +20,14 @@ class SettingsDialog : Adw.PreferencesWindow {
         marker_switch.active = settings.send_marker;
         notification_switch.active = settings.notifications;
         emoji_switch.active = settings.convert_utf8_smileys;
+        zoom_spinbutton_config = new Adjustment((double) settings.zoom_level, 0.0, 300.0, 1.0, 5.0, 0.0);
+        zoom_spinbutton.set_adjustment(zoom_spinbutton_config);
 
         typing_switch.notify["active"].connect(() => { settings.send_typing = typing_switch.active; } );
         marker_switch.notify["active"].connect(() => { settings.send_marker = marker_switch.active; } );
         notification_switch.notify["active"].connect(() => { settings.notifications = notification_switch.active; } );
         emoji_switch.notify["active"].connect(() => { settings.convert_utf8_smileys = emoji_switch.active; });
+        zoom_spinbutton.value_changed.connect(() => { settings.zoom_level = zoom_spinbutton.get_value_as_int(); });
     }
 }