add ui to create new pool

src/main/java/com/sparrowwallet/sparrow/joinstr/NewPoolController.java

@@ -1,8 +1,77 @@
 package com.sparrowwallet.sparrow.joinstr;
 
+import javafx.fxml.FXML;
+import javafx.scene.control.TextField;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
+
 public class NewPoolController extends JoinstrFormController {
+    @FXML
+    private TextField denominationField;
+
+    @FXML
+    private TextField peersField;
+
     @Override
     public void initializeView() {
+    }
 
+    @FXML
+    private void handleCreateButton() {
+        try {
+            String denomination = denominationField.getText().trim();
+            String peers = peersField.getText().trim();
+
+            if (denomination.isEmpty() || peers.isEmpty()) {
+                showError("Please enter denomination and peers to create a pool.");
+                return;
+            }
+
+            try {
+                double denominationValue = Double.parseDouble(denomination);
+                if (denominationValue <= 0) {
+                    showError("Denomination must be greater than 0");
+                    return;
+                }
+            } catch (NumberFormatException e) {
+                showError("Invalid denomination format");
+                return;
+            }
+
+            try {
+                int peersValue = Integer.parseInt(peers);
+                if (peersValue <= 0) {
+                    showError("Number of peers must be greater than 0");
+                    return;
+                }
+            } catch (NumberFormatException e) {
+                showError("Invalid number of peers format");
+                return;
+            }
+
+            // TODO: Implement pool creation logic here
+
+            /*
+            Alert alert = new Alert(AlertType.INFORMATION);
+            alert.setTitle("Success");
+            alert.setHeaderText(null);
+            alert.setContentText("Pool created successfully!");
+            alert.showAndWait();
+            */
+
+            denominationField.clear();
+            peersField.clear();
+
+        } catch (Exception e) {
+            showError("An error occurred: " + e.getMessage());
+        }
+    }
+
+    private void showError(String message) {
+        Alert alert = new Alert(AlertType.ERROR);
+        alert.setTitle("Error");
+        alert.setHeaderText(null);
+        alert.setContentText(message);
+        alert.showAndWait();
     }
 }

src/main/resources/com/sparrowwallet/sparrow/joinstr/new_pool.fxml

@@ -9,18 +9,29 @@
         <Insets top="30" right="30" bottom="30" left="30"/>
     </padding>
     <center>
-        <VBox maxWidth="Infinity" fx:id="contentVBox">
+        <VBox maxWidth="Infinity" fx:id="contentVBox" spacing="20">
-            <GridPane maxWidth="Infinity" HBox.hgrow="ALWAYS" hgap="10.0" vgap="10.0">
+            <VBox maxWidth="Infinity" HBox.hgrow="ALWAYS">
-                <columnConstraints>
+                <Label styleClass="sub-title">Create a new pool</Label>
-                    <ColumnConstraints percentWidth="80" />
+            </VBox>
-                    <ColumnConstraints percentWidth="20" />
+
-                </columnConstraints>
+            <GridPane hgap="10" vgap="15" maxWidth="600">
-                <children>
+                <padding>
-                    <VBox maxWidth="Infinity" HBox.hgrow="ALWAYS" GridPane.rowIndex="0" GridPane.columnIndex="0">
+                    <Insets top="20"/>
-                        <Label styleClass="title">New Pool</Label>
+                </padding>
-                        <Label styleClass="sub-title">Create a new pool</Label>
+
-                    </VBox>
+                <Label text="Denomination (BTC):" GridPane.rowIndex="0" GridPane.columnIndex="0" style="-fx-text-fill: #aaaaaa;"/>
-                </children>
+                <TextField fx:id="denominationField" GridPane.rowIndex="0" GridPane.columnIndex="1"
+                    style="-fx-background-color: #444444; -fx-text-fill: white; -fx-prompt-text-fill: #888888;"
+                    promptText="Enter denomination"/>
+
+                <Label text="Number of Peers:" GridPane.rowIndex="1" GridPane.columnIndex="0" style="-fx-text-fill: #aaaaaa;"/>
+                <TextField fx:id="peersField" GridPane.rowIndex="1" GridPane.columnIndex="1"
+                    style="-fx-background-color: #444444; -fx-text-fill: white; -fx-prompt-text-fill: #888888;"
+                    promptText="Enter number of peers"/>
+
+                <Button fx:id="createButton" text="Create" GridPane.rowIndex="2" GridPane.columnIndex="1"
+                    onAction="#handleCreateButton"
+                    style="-fx-background-color: #2196F3; -fx-text-fill: white; -fx-cursor: hand;"/>
             </GridPane>
         </VBox>
     </center>