doubleTabWidgetsInput

Author: Reinissance

src/gui/Widget.m

@@ -70,6 +70,14 @@ - (id)initWithAtomLine:(NSArray *)line andGui:(Gui *)gui {
 	if(self) {
 		[self _init];
 		self.gui = gui;
+        if ([self.type isEqual:@"Symbol"] ||
+            [self.type isEqual:@"List"] ||
+            [self.type isEqual:@"Knob"] ||
+            [self.type hasPrefix:@"Number"] ||
+            [self.type hasSuffix:@"Radio"] ||
+            [self.type hasSuffix:@"Slider"]) {
+            [self addDoubleTabInputToWidget:self];
+        }
 	}
 	return self;
 }
@@ -337,4 +345,54 @@ + (NSString *)stringFromFloat:(double)f withWidth:(int)width {
 	return string;
 }
 
+- (void) addDoubleTabInputToWidget:(Widget*)w {
+    UITapGestureRecognizer *tab = [[UITapGestureRecognizer alloc]
+                                           initWithTarget:self
+                                   action:@selector(handleWidgetTap:)];
+    tab.numberOfTapsRequired = 2;
+    [w addGestureRecognizer:tab];
+}
+
+- (void)handleWidgetTap:(UITapGestureRecognizer *)gestureRecognizer {
+    Widget *control = (Widget *)gestureRecognizer.view;
+    if (control) {
+        [self showInputDialogForWidget:control withNumberPad:!([control.type isEqual:@"Symbol"] || [control.type isEqual:@"List"])];
+    }
+}
+
+- (void) showInputDialogForWidget: (Widget*)w withNumberPad: (BOOL) pad {
+    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil
+                                                                                 message:@"set value:"
+                                                                          preferredStyle:UIAlertControllerStyleAlert];
+    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
+        if (pad) {
+            textField.keyboardType = UIKeyboardTypeDecimalPad;
+        }
+        [textField becomeFirstResponder];
+    }];
+    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel"
+                                                               style:UIAlertActionStyleCancel
+                                                             handler:nil];
+    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"Set"
+                                                       style:UIAlertActionStyleDefault
+                                                     handler:^(UIAlertAction * _Nonnull action) {
+        UITextField *textField = alertController.textFields.firstObject;
+        if (textField) {
+            if (![textField.text  isEqual: @""] && ![textField.text  isEqual: @"-"]) {
+                if (pad) {
+                    NSNumber *value = [NSNumber numberWithFloat:[[textField.text stringByReplacingOccurrencesOfString:@"," withString:@"."] floatValue]];
+                    [w receiveFloat:[value floatValue] fromSource:@"user"]; // source has no effect here
+                }
+                else {
+                    [w receiveSymbol:textField.text fromSource:@"user"]; // source has no effect here
+                }
+            }
+        }
+    }];
+    [alertController addAction:cancelAction];
+    [alertController addAction:okAction];
+    UIViewController *rootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;
+    [rootViewController presentViewController:alertController animated:YES completion:nil];
+}
+
 @end