tabInputsImproved

Author: Reinissance

src/gui/Widget.m

@@ -361,38 +361,55 @@ - (void)handleWidgetTap:(UITapGestureRecognizer *)gestureRecognizer {
 }
 
 - (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
+    dispatch_async(dispatch_get_main_queue(), ^{    // make shure we dont affect audio
+        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil
+                                                                                     message:@"set value:"
+                                                                              preferredStyle:UIAlertControllerStyleAlert];
+        [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
+            if (pad) {
+                textField.keyboardType = UIKeyboardTypeDecimalPad;
+                // add button to toggle positive/negative
+                UIButton *minusBtn = [UIButton buttonWithType:UIButtonTypeCustom];
+                [minusBtn addTarget:self action:@selector(toggleNegative:) forControlEvents:UIControlEventTouchUpInside];
+                [minusBtn setTitle:@"-/+" forState:UIControlStateNormal];
+
+                textField.leftView = minusBtn;
+                textField.leftViewMode = UITextFieldViewModeAlways;
+            }
+            textField.textAlignment = NSTextAlignmentCenter;
+            [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) {
+                        float value = [[textField.text stringByReplacingOccurrencesOfString:@"," withString:@"."] floatValue];
+                        // reflect the widget's min/max range
+                        value = ((value >= w.minValue) && (value <= w.maxValue)) ? value : (value >= w.minValue) ? w.maxValue : w.minValue;
+                        [w receiveFloat:value 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];
+        }];
+        [alertController addAction:cancelAction];
+        [alertController addAction:okAction];
+        UIViewController *rootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;
+        [rootViewController presentViewController:alertController animated:YES completion:nil];
+    });
+}
+
+- (void) toggleNegative: (UIButton*) btn {
+    UITextField *tf = (UITextField*) [btn superview];
+    tf.text = ([tf.text hasPrefix:@"-"]) ? [tf.text substringFromIndex:1] : [@"-" stringByAppendingString:tf.text];
 }
 
 @end