qml: Validate input for dbcache, threads, and prune target settings

Validates that the input for these settings is not less or larger than
the allowed values. If so, displays an informational error text.

Author: jarolrod

src/qml/components/DeveloperOptions.qml

@@ -27,12 +27,19 @@ ColumnLayout {
         id: dbcacheSetting
         Layout.fillWidth: true
         header: qsTr("Database cache size (MiB)")
+        errorText: qsTr("This is not a valid cache size. Please choose a value between %1 and %2 MiB.").arg(optionsModel.minDbcacheSizeMiB).arg(optionsModel.maxDbcacheSizeMiB)
+        showErrorText: false
         actionItem: ValueInput {
             parentState: dbcacheSetting.state
             description: optionsModel.dbcacheSizeMiB
             onEditingFinished: {
-                optionsModel.dbcacheSizeMiB = parseInt(text)
-                dbcacheSetting.forceActiveFocus()
+                if (checkValidity(optionsModel.minDbcacheSizeMiB, optionsModel.maxDbcacheSizeMiB, parseInt(text))) {
+                    optionsModel.dbcacheSizeMiB = parseInt(text)
+                    dbcacheSetting.forceActiveFocus()
+                    dbcacheSetting.showErrorText = false
+                } else {
+                    dbcacheSetting.showErrorText = true
+                }
             }
         }
         onClicked: {
@@ -45,12 +52,19 @@ ColumnLayout {
         id: parSetting
         Layout.fillWidth: true
         header: qsTr("Script verification threads")
+        errorText: qsTr("This is not a valid thread count. Please choose a value between %1 and %2 threads.").arg(optionsModel.minScriptThreads).arg(optionsModel.maxScriptThreads)
+        showErrorText: !loadedItem.acceptableInput && loadedItem.length > 0
         actionItem: ValueInput {
             parentState: parSetting.state
             description: optionsModel.scriptThreads
             onEditingFinished: {
-                optionsModel.scriptThreads = parseInt(text)
-                parSetting.forceActiveFocus()
+                if (checkValidity(optionsModel.minScriptThreads, optionsModel.maxScriptThreads, parseInt(text))) {
+                    optionsModel.scriptThreads = parseInt(text)
+                    parSetting.forceActiveFocus()
+                    parSetting.showErrorText = false
+                } else {
+                    parSetting.showErrorText = true
+                }
             }
         }
         onClicked: {

src/qml/components/StorageSettings.qml

@@ -33,12 +33,19 @@ ColumnLayout {
         id: pruneTargetSetting
         Layout.fillWidth: true
         header: qsTr("Storage limit (GB)")
+        errorText: qsTr("This is not a valid prune target. Please choose a value that is equal to or larger than 1GB")
+        showErrorText: false
         actionItem: ValueInput {
             parentState: pruneTargetSetting.state
             description: optionsModel.pruneSizeGB
             onEditingFinished: {
-                optionsModel.pruneSizeGB = parseInt(text)
-                pruneTargetSetting.forceActiveFocus()
+                if (parseInt(text) < 1) {
+                    pruneTargetSetting.showErrorText = true
+                } else {
+                    optionsModel.pruneSizeGB = parseInt(text)
+                    pruneTargetSetting.forceActiveFocus()
+                    pruneTargetSetting.showErrorText = false
+                }
             }
         }
         onClicked: {

src/qml/controls/ValueInput.qml

@@ -14,6 +14,8 @@ TextInput {
     property color textColor: root.filled ? Theme.color.neutral9 : Theme.color.neutral5
     enabled: true
     state: root.parentState
+    validator: IntValidator{}
+    maximumLength: 5
 
     states: [
         State {
@@ -48,4 +50,12 @@ TextInput {
     Behavior on color {
         ColorAnimation { duration: 150 }
     }
+
+    function checkValidity(minVal, maxVal, input) {
+        if (input < minVal || input > maxVal) {
+            return false
+        } else {
+            return true
+        }
+    }
 }