Merge pull request #296 from Z-Bolt/2.7.3-devv2.7.3

2.7.3 dev into master

34 files changed, 353 insertions, 191 deletions

diff --git a/Makefile b/Makefile
index 09e0b5c..58c48ea 100755
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ JESSIE_GO_TAGS := gtk_3_14
 
 # Build information
 #GIT_COMMIT = $(shell git rev-parse HEAD | cut -c1-7)
-VERSION := 2.7.2
+VERSION := 2.7.3
 BUILD_DATE ?= $(shell date --utc +%Y%m%d-%H:%M:%S)
 #BRANCH = $(shell git rev-parse --abbrev-ref HEAD)
 
diff --git a/README.md b/README.md
index 3826dac..f7fa9ec 100755
--- a/README.md
+++ b/README.md
@@ -83,15 +83,15 @@ There are two ways to install OctoScreen: the recommended and supported way is t
 
 For example, to install on a new RaspberryPi with OctoPi:
 ```sh
-wget https://github.com/Z-Bolt/OctoScreen/releases/download/v2.7.2/octoscreen_2.7.2_armhf.deb
-sudo dpkg -i octoscreen_2.7.2_armhf.deb
+wget https://github.com/Z-Bolt/OctoScreen/releases/download/v2.7.3/octoscreen_2.7.3_armhf.deb
+sudo dpkg -i octoscreen_2.7.3_armhf.deb
 ```
 
 Or to update an existing version of OctoScreen:
 ```sh
-wget https://github.com/Z-Bolt/OctoScreen/releases/download/v2.7.2/octoscreen_2.7.2_armhf.deb
+wget https://github.com/Z-Bolt/OctoScreen/releases/download/v2.7.3/octoscreen_2.7.3_armhf.deb
 sudo dpkg -r octoscreen
-sudo dpkg -i octoscreen_2.7.2_armhf.deb
+sudo dpkg -i octoscreen_2.7.3_armhf.deb
 sudo reboot now
 ```
 
@@ -169,6 +169,11 @@ The controls are limit to static controls without `inputs`.
 
 
 
+------------
+## Wiki
+For troubleshooting and general information about this project, be sure to check out the Wiki page, located at https://github.com/Z-Bolt/OctoScreen/wiki
+
+
 
 ------------
 <!--
diff --git a/interfaces/IPanel.go b/interfaces/IPanel.go
index 4f9f0b5..bca9a8d 100755
--- a/interfaces/IPanel.go
+++ b/interfaces/IPanel.go
@@ -5,6 +5,7 @@ import (
 )
 
 type IPanel interface {
+	Name() string
 	Grid() *gtk.Grid
 	PreShow()
 	Show()
diff --git a/main.go b/main.go
index dc34493..883a2d2 100755
--- a/main.go
+++ b/main.go
@@ -122,6 +122,7 @@ func main() {
 	settings, _ := gtk.SettingsGetDefault()
 	settings.SetProperty("gtk-application-prefer-dark-theme", true)
 
+	utils.DumpSystemInformation()
 	utils.DumpEnvironmentVariables()
 
 	setCursor()
diff --git a/octoprintApis/SystemExecuteCommandRequest.go b/octoprintApis/SystemExecuteCommandRequest.go
new file mode 100644
index 0000000..13eb51e
--- /dev/null
+++ b/octoprintApis/SystemExecuteCommandRequest.go
@@ -0,0 +1,35 @@
+package octoprintApis
+
+import (
+	// "encoding/json"
+	"fmt"
+
+	"github.com/Z-Bolt/OctoScreen/logger"
+	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
+)
+
+
+var ExecuteErrors = StatusMapping {
+	404: "The command could not be found for source and action",
+	500: "The command didn’t define a command to execute, the command returned a non-zero return code and ignore was not true or some other internal server error occurred",
+}
+
+// SystemExecuteCommandRequest retrieves all configured system commands.
+type SystemExecuteCommandRequest struct {
+	// Source for which to list commands.
+	Source dataModels.CommandSource `json:"source"`
+
+	// Action is the identifier of the command, action from its definition.
+	Action string `json:"action"`
+}
+
+// Do sends an API request and returns an error if any.
+func (this *SystemExecuteCommandRequest) Do(client *Client) error {
+	uri := fmt.Sprintf("%s/%s/%s", SystemCommandsApiUri, this.Source, this.Action)
+	_, err := client.doJsonRequest("POST", uri, nil, ExecuteErrors, true)
+	if err != nil {
+		logger.LogError("SystemExecuteCommandRequest.Do()", "client.doJsonRequest(POST)", err)
+	}
+
+	return err
+}
diff --git a/octoprintApis/ZOffsetRequest.go b/octoprintApis/ZOffsetRequest.go
index eb73e31..972ee1c 100755
--- a/octoprintApis/ZOffsetRequest.go
+++ b/octoprintApis/ZOffsetRequest.go
@@ -24,7 +24,7 @@ func (this *ZOffsetRequest) Do(client *Client) (*dataModels.ZOffsetResponse, err
 		return nil, err
 	}
 
-	// bytes, err := client.doJsonRequest("POST", URIZBoltRequest, params, ConnectionErrors)
+	// bytes, err := client.doJsonRequest("POST", UriZBoltRequest, params, ConnectionErrors)
 	bytes, err := client.doJsonRequest("GET", PluginZBoltApiUri, params, ConnectionErrors, true)
 	if err != nil {
 		logger.LogError("ZOffsetRequest.Do()", "client.doJsonRequest()", err)
diff --git a/octoprintApis/client.go b/octoprintApis/client.go
index 080f8a4..de7d596 100755
--- a/octoprintApis/client.go
+++ b/octoprintApis/client.go
@@ -58,21 +58,14 @@ func (this *Client) doJsonRequest(
 
 	bytes, err := this.doRequest(method, target, "application/json", body, statusMapping, isRequired)
 	if err != nil {
-		if isRequired {
-			// Some APIs return an error and the error should be logged.
-			logger.LogError("Client.doJsonRequest()", "this.doRequest()", err)
-		} else {
-			// On the other hand, calls to some APIs are optional, and the result should be logged
-			// as info and leave it up to the caller to determine whether it's an error or not.
-			logger.Infof("Client.doJsonRequest() - this.doRequest() returned %q", err)
-		}
-
+		logOptionalError("Client.doJsonRequest()", "this.doRequest()", err, isRequired)
 		logger.TraceLeave("Client.doJsonRequest()")
 		return nil, err
 	}
 
 	// Use the following only for debugging.
 	if logger.LogLevel() == "debug" {
+		logger.Debug("Client.doJsonRequest() - converting bytes to JSON")
 		json := string(bytes)
 		logger.Debugf("JSON response: %s", json)
 	}
@@ -124,59 +117,103 @@ func (this *Client) doRequest(
 		logger.LogError("Client.doRequest()", "this.httpClient.Do()", err)
 		logger.TraceLeave("Client.doRequest()")
 		return nil, err
+	} else {
+		logger.Debug("Client.doRequest() - httpClient.Do() passed")
 	}
 
-	bytes, err := this.handleResponse(response, statusMapping)
+	bytes, err := this.handleResponse(response, statusMapping, isRequired)
 	if err != nil {
-		if isRequired {
-			// Some APIs return an error and the error should be logged.
-			logger.LogError("Client.doRequest()", "this.handleResponse()", err)
-		} else {
-			// On the other hand, calls to some APIs are optional, and the result should be logged
-			// as info and leave it up to the caller to determine whether it's an error or not.
-			logger.Infof("Client.doRequest() - this.handleResponse() returned %q", err)
-		}
-		logger.TraceLeave("Client.doRequest()")
-		return nil, err
+		logOptionalError("Client.doRequest()", "this.handleResponse()", err, isRequired)
+		bytes = nil
+	} else {
+		logger.Debug("Client.doRequest() - handleResponse() passed")
 	}
 
 	logger.TraceLeave("Client.doRequest()")
 	return bytes, err
 }
 
-
 func (this *Client) handleResponse(
 	httpResponse *http.Response,
 	statusMapping StatusMapping,
+	isRequired bool,
 ) ([]byte, error) {
+	logger.TraceEnter("Client.handleResponse()")
+
 	defer httpResponse.Body.Close()
 
 	if statusMapping != nil {
 		if err := statusMapping.Error(httpResponse.StatusCode); err != nil {
+			logger.LogError("Client.handleResponse()", "statusMapping.Error()", err)
+			logger.TraceLeave("Client.handleResponse()")
 			return nil, err
 		}
 	}
 
 	if httpResponse.StatusCode == 401 {
+		logger.Error("Client.handleResponse() - StatusCode is 401")
+		logger.TraceLeave("Client.handleResponse()")
 		return nil, ErrUnauthorized
 	}
 
 	if httpResponse.StatusCode == 204 {
+		logger.Error("Client.handleResponse() - StatusCode is 204")
+		logger.TraceLeave("Client.handleResponse()")
 		return nil, nil
 	}
 
 	body, err := ioutil.ReadAll(httpResponse.Body)
 	if err != nil {
+		logger.LogError("Client.handleResponse()", "ioutil.ReadAll()", err)
+		logger.TraceLeave("Client.handleResponse()")
 		return nil, err
 	}
 
 	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode <= 209 {
-		return body, nil
+		logger.Debugf("Client.handleResponse() - status code %d was within range", httpResponse.StatusCode)
+	} else {
+		errMsg := fmt.Sprintf("Unexpected status code: %d", httpResponse.StatusCode)
+		if httpResponse.StatusCode == 404 {
+			logOptionalMessage(errMsg, isRequired)
+		} else {
+			logger.Error(errMsg)
+		}
+
+		err = fmt.Errorf(errMsg)
+		body = nil
 	}
 
-	return nil, fmt.Errorf("unexpected status code: %d", httpResponse.StatusCode)
+	logger.TraceLeave("Client.handleResponse()")
+	return body, err
+}
+
+func logOptionalError(
+	currentFunctionName string,
+	functionCalledName string,
+	err error,
+	isRequired bool,
+) {
+	if isRequired {
+		// Some APIs return an error and the error should be logged.
+		logger.LogError(currentFunctionName, functionCalledName, err)
+	} else {
+		// On the other hand, calls to some APIs are optional, and the result should be logged
+		// as info and leave it up to the caller to determine whether it's an error or not.
+		msg := fmt.Sprintf("%s - %s returned %q", currentFunctionName, functionCalledName, err)
+		logger.Info(msg)
+	}
 }
 
+func logOptionalMessage(
+	msg string,
+	isRequired bool,
+) {
+	if isRequired {
+		logger.Error(msg)
+	} else {
+		logger.Info(msg)
+	}
+}
 
 func joinUrl(base, uri string) string {
 	u, _ := url.Parse(uri)
diff --git a/octoprintApis/system.go b/octoprintApis/system.go
index ef1da2f..97f0024 100755
--- a/octoprintApis/system.go
+++ b/octoprintApis/system.go
@@ -2,7 +2,7 @@ package octoprintApis
 
 import (
 	"encoding/json"
-	"fmt"
+	// "fmt"
 
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
@@ -11,13 +11,6 @@ import (
 
 const SystemCommandsApiUri = "/api/system/commands"
 
-
-var ExecuteErrors = StatusMapping {
-	404: "The command could not be found for source and action",
-	500: "The command didn’t define a command to execute, the command returned a non-zero return code and ignore was not true or some other internal server error occurred",
-}
-
-
 // SystemCommandsRequest retrieves all configured system commands.
 type SystemCommandsRequest struct{}
 
@@ -35,39 +28,25 @@ func (cmd *SystemCommandsRequest) Do(c *Client) (*dataModels.SystemCommandsRespo
 
 	for i := range response.Core {
 		commandDefinition := response.Core[i]
-		err = json.Unmarshal(commandDefinition.RawConfirm, &commandDefinition.Confirm)
-		if err != nil {
-			logger.LogError("SystemCommandsRequest.Do()", "json.Unmarshal(Core)", err)
-			commandDefinition.Confirm = ""
-			return nil, err
-		}
+		convertRawConfirm(commandDefinition)
 	}
 
 	for i := range response.Custom {
 		commandDefinition := response.Custom[i]
-		err = json.Unmarshal(commandDefinition.RawConfirm, &commandDefinition.Confirm)
-		if err != nil {
-			logger.LogError("SystemCommandsRequest.Do()", "json.Unmarshal(Custom)", err)
-			commandDefinition.Confirm = ""
-			return nil, err
-		}
+		convertRawConfirm(commandDefinition)
 	}
 
 	return response, err
 }
 
-// SystemExecuteCommandRequest retrieves all configured system commands.
-type SystemExecuteCommandRequest struct {
-	// Source for which to list commands.
-	Source dataModels.CommandSource `json:"source"`
-
-	// Action is the identifier of the command, action from its definition.
-	Action string `json:"action"`
-}
+func convertRawConfirm(commandDefinition *dataModels.CommandDefinition) {
+	if commandDefinition == nil || commandDefinition.RawConfirm == nil || len(commandDefinition.RawConfirm) < 1 {
+		return
+	}
 
-// Do sends an API request and returns an error if any.
-func (cmd *SystemExecuteCommandRequest) Do(c *Client) error {
-	uri := fmt.Sprintf("%s/%s/%s", SystemCommandsApiUri, cmd.Source, cmd.Action)
-	_, err := c.doJsonRequest("POST", uri, nil, ExecuteErrors, true)
-	return err
+	err := json.Unmarshal(commandDefinition.RawConfirm, &commandDefinition.Confirm)
+	if err != nil {
+		logger.LogError("SystemCommandsRequest.convertRawConfirm()", "json.Unmarshal(Custom)", err)
+		commandDefinition.Confirm = ""
+	}
 }
diff --git a/ui/BedLevelPanel.go b/ui/BedLevelPanel.go
index b96290f..caa36da 100755
--- a/ui/BedLevelPanel.go
+++ b/ui/BedLevelPanel.go
@@ -4,13 +4,15 @@ import (
 	"fmt"
 
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var bedLevelPanelInstance *bedLevelPanel
 
 type bedLevelPanel struct {
@@ -23,11 +25,10 @@ type bedLevelPanel struct {
 
 func BedLevelPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *bedLevelPanel {
 	if bedLevelPanelInstance == nil {
 		instance := &bedLevelPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("BedLevelPanel", ui),
 		}
 		instance.initialize()
 		bedLevelPanelInstance = instance
diff --git a/ui/CommonPanel.go b/ui/CommonPanel.go
index c7b75c2..845b545 100755
--- a/ui/CommonPanel.go
+++ b/ui/CommonPanel.go
@@ -9,48 +9,72 @@ import (
 
 	// "github.com/gotk3/gotk3/glib"
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
-// OctoScreenVersion - set at compilation time.
-var OctoScreenVersion = "2.7.2"
 
 type CommonPanel struct {
+	name				string
 	UI					*UI
+	// parentPanel			interfaces.IPanel
+	includeBackButton	bool
 	grid				*gtk.Grid
 	preShowCallback		func()
 	backgroundTask		*utils.BackgroundTask
-	// parentPanel			interfaces.IPanel
 	panelWidth			int
 	panelHeight			int
-	includeBackButton	bool
 	backButton			*gtk.Button
 	buttons				[]gtk.IWidget
 }
 
-func NewCommonPanel(ui *UI, parentPanel interfaces.IPanel) CommonPanel {
-	return newPanel(ui, parentPanel, true)
+func NewCommonPanel(
+	name string,
+	ui *UI,
+	//parentPanel interfaces.IPanel,
+) CommonPanel {
+	return newPanel(
+		name,
+		ui,
+		//parentPanel,
+		true,
+	)
 }
 
-func NewTopLevelCommonPanel(ui *UI, parentPanel interfaces.IPanel) CommonPanel {
-	return newPanel(ui, parentPanel, false)
+func NewTopLevelCommonPanel(
+	name string,
+	ui *UI,
+	//parentPanel interfaces.IPanel,
+) CommonPanel {
+	return newPanel(
+		name,
+		ui,
+		//parentPanel,
+		false,
+	)
 }
 
-func newPanel(ui *UI, parentPanel interfaces.IPanel, includeBackButton bool) CommonPanel {
+func newPanel(
+	name string,
+	ui *UI,
+	// parentPanel interfaces.IPanel,
+	includeBackButton bool,
+) CommonPanel {
 	grid := utils.MustGrid()
 	grid.SetRowHomogeneous(true)
 	grid.SetColumnHomogeneous(true)
 
 	return CommonPanel {
+		name:				name,
 		UI:					ui,
-		grid:				grid,
 		// parentPanel:		parentPanel,
+		includeBackButton:	includeBackButton,
+		grid:				grid,
 		panelWidth:			4,
 		panelHeight:		3,
-		includeBackButton:	includeBackButton,
 	}
 }
 
@@ -97,6 +121,10 @@ func (this *CommonPanel) Hide() {
 	}
 }
 
+func (this *CommonPanel) Name() string {
+	return this.name
+}
+
 func (this *CommonPanel) Grid() *gtk.Grid {
 	return this.grid
 }
diff --git a/ui/ConfigurationPanel.go b/ui/ConfigurationPanel.go
index a67a28d..82efb89 100755
--- a/ui/ConfigurationPanel.go
+++ b/ui/ConfigurationPanel.go
@@ -1,10 +1,11 @@
 package ui
 
 import (
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var configurationPanelInstance *configurationPanel
 
 type configurationPanel struct {
@@ -13,11 +14,10 @@ type configurationPanel struct {
 
 func ConfigurationPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *configurationPanel {
 	if configurationPanelInstance == nil {
 		instance := &configurationPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("ConfigurationPanel", ui),
 		}
 		instance.initialize()
 		configurationPanelInstance = instance
@@ -67,17 +67,17 @@ func (this *configurationPanel) initialize() {
 }
 
 func (this *configurationPanel) showBedLevelPanel() {
-	this.UI.GoToPanel(BedLevelPanel(this.UI, this))
+	this.UI.GoToPanel(BedLevelPanel(this.UI))
 }
 
 func (this *configurationPanel) showZOffsetCalibrationPanel() {
-	this.UI.GoToPanel(ZOffsetCalibrationPanel(this.UI, this))
+	this.UI.GoToPanel(ZOffsetCalibrationPanel(this.UI))
 }
 
 func (this *configurationPanel) showNetworkPanel() {
-	this.UI.GoToPanel(NetworkPanel(this.UI, this))
+	this.UI.GoToPanel(NetworkPanel(this.UI))
 }
 
 func (this *configurationPanel) showSystemPanel() {
-	this.UI.GoToPanel(SystemPanel(this.UI, this))
+	this.UI.GoToPanel(SystemPanel(this.UI))
 }
diff --git a/ui/ConnectionPanel.go b/ui/ConnectionPanel.go
index 5ec3d43..e7e86ae 100755
--- a/ui/ConnectionPanel.go
+++ b/ui/ConnectionPanel.go
@@ -5,13 +5,15 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/gotk3/gotk3/gtk"
 	"pifke.org/wpasupplicant"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	"github.com/gotk3/gotk3/gtk"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	// "github.com/Z-Bolt/OctoScreen/uiWidgets"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var connectionPanelInstance *connectionPanel
 
 var keyBoardChars = []byte{
@@ -35,12 +37,11 @@ type connectionPanel struct {
 
 func ConnectionPanel(
 	ui					*UI,
-	parentPanel			interfaces.IPanel,
 	SSID				string,
 ) *connectionPanel {
 	if connectionPanelInstance == nil {
 		instance := &connectionPanel {
-			CommonPanel:		NewCommonPanel(ui, parentPanel),
+			CommonPanel:		NewCommonPanel("ConnectionPanel", ui),
 			cursorPosition:		0,
 		}
 		instance.initialize()
diff --git a/ui/ControlPanel.go b/ui/ControlPanel.go
index 71fc839..2bea460 100755
--- a/ui/ControlPanel.go
+++ b/ui/ControlPanel.go
@@ -4,7 +4,8 @@ import (
 	"strings"
 
 	// "github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
@@ -12,6 +13,7 @@ import (
 	// "github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var controlPanelInstance *controlPanel
 
 type controlPanel struct {
@@ -20,11 +22,10 @@ type controlPanel struct {
 
 func ControlPanel(
 	ui 				*UI,
-	parentPanel		interfaces.IPanel,
 ) *controlPanel {
 	if controlPanelInstance == nil {
 		instance := &controlPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("ControlPanel", ui),
 		}
 		instance.initialize()
 		controlPanelInstance = instance
@@ -36,20 +37,32 @@ func ControlPanel(
 func (this *controlPanel) initialize() {
 	defer this.Initialize()
 
-	for _, controlDefinition := range this.getDefaultControls() {
+	defaultControls := this.getDefaultControls()
+	for _, controlDefinition := range defaultControls {
 		icon := strings.ToLower(strings.Replace(controlDefinition.Name, " ", "-", -1))
 		button := uiWidgets.CreateControlButton(this.UI.Client, this.UI.window, controlDefinition, icon)
 		this.AddButton(button)
 	}
 
+
+	// 12 (max) - Back button = 11 available slots to display.
+	const maxSlots = 11
+	currentButtonCount := len(defaultControls)
+
 	for _, controlDefinition := range this.getCustomControls() {
-		button := uiWidgets.CreateControlButton(this.UI.Client, this.UI.window, controlDefinition, "custom-script")
-		this.AddButton(button)
+		if currentButtonCount < maxSlots {
+			button := uiWidgets.CreateControlButton(this.UI.Client, this.UI.window, controlDefinition, "custom-script")
+			this.AddButton(button)
+			currentButtonCount++
+		}
 	}
 
 	for _, commandDefinition := range this.getCommands() {
-		button := uiWidgets.CreateCommandButton(this.UI.Client, this.UI.window, commandDefinition, "custom-script")
-		this.AddButton(button)
+		if currentButtonCount < maxSlots {
+			button := uiWidgets.CreateCommandButton(this.UI.Client, this.UI.window, commandDefinition, "custom-script")
+			this.AddButton(button)
+			currentButtonCount++
+		}
 	}
 }
 
diff --git a/ui/CustomItemsPanel.go b/ui/CustomItemsPanel.go
index fb39399..98ab875 100755
--- a/ui/CustomItemsPanel.go
+++ b/ui/CustomItemsPanel.go
@@ -1,12 +1,13 @@
 package ui
 
 import (
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	// "github.com/Z-Bolt/OctoScreen/uiWidgets"
 )
 
+
 type customItemsPanel struct {
 	CommonPanel
 	items			[]dataModels.MenuItem
@@ -14,11 +15,10 @@ type customItemsPanel struct {
 
 func CustomItemsPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 	items			[]dataModels.MenuItem,
 ) *customItemsPanel {
 	instance := &customItemsPanel {
-		CommonPanel: NewCommonPanel(ui, parentPanel),
+		CommonPanel: NewCommonPanel("CustomItemsPanel", ui),
 		items:       items,
 	}
 	instance.initialize()
diff --git a/ui/FanPanel.go b/ui/FanPanel.go
index ea02e5c..83b7ea5 100755
--- a/ui/FanPanel.go
+++ b/ui/FanPanel.go
@@ -4,11 +4,12 @@ import (
 	// "fmt"
 
 	// "github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
 	// "github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var fanPanelInstance *fanPanel
 
 type fanPanel struct {
@@ -17,11 +18,10 @@ type fanPanel struct {
 
 func FanPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *fanPanel {
 	if fanPanelInstance == nil {
 		instance := &fanPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("FanPanel", ui),
 		}
 		instance.initialize()
 		fanPanelInstance = instance
diff --git a/ui/FilamentPanel.go b/ui/FilamentPanel.go
index df7e313..9b6e0ca 100755
--- a/ui/FilamentPanel.go
+++ b/ui/FilamentPanel.go
@@ -6,11 +6,13 @@ import (
 	// "time"
 
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var filamentPanelInstance *filamentPanel
 
 type filamentPanel struct {
@@ -34,11 +36,10 @@ type filamentPanel struct {
 
 func FilamentPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *filamentPanel {
 	if filamentPanelInstance == nil {
 		instance := &filamentPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("FilamentPanel", ui),
 		}
 		instance.initialize()
 		filamentPanelInstance = instance
@@ -120,5 +121,5 @@ func (this *filamentPanel) initialize() {
 }
 
 func (this *filamentPanel) showTemperaturePanel() {
-	this.UI.GoToPanel(TemperaturePanel(this.UI, this))
+	this.UI.GoToPanel(TemperaturePanel(this.UI))
 }
diff --git a/ui/FilesPanel.go b/ui/FilesPanel.go
index 3d749f0..74d88e2 100755
--- a/ui/FilesPanel.go
+++ b/ui/FilesPanel.go
@@ -10,7 +10,8 @@ import (
 	"github.com/coreos/go-systemd/daemon"
 	"github.com/dustin/go-humanize"
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
@@ -32,7 +33,6 @@ type filesPanel struct {
 
 func FilesPanel(
 	ui					*UI,
-	parentPanel			interfaces.IPanel,
 ) *filesPanel {
 	if filesPanelInstance == nil {
 		locationHistory := utils.LocationHistory {
@@ -40,7 +40,7 @@ func FilesPanel(
 		}
 
 		instance := &filesPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("FilesPanel", ui),
 			locationHistory: locationHistory,
 		}
 		instance.initialize()
diff --git a/ui/HomePanel.go b/ui/HomePanel.go
index 5b26473..58cc326 100755
--- a/ui/HomePanel.go
+++ b/ui/HomePanel.go
@@ -2,13 +2,15 @@ package ui
 
 import (
 	// "github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
 	// "github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var homePanelInstance *homePanel
 
 type homePanel struct {
@@ -17,11 +19,10 @@ type homePanel struct {
 
 func HomePanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *homePanel {
 	if homePanelInstance == nil {
 		instance := &homePanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("HomePanel", ui),
 		}
 		instance.initialize()
 		homePanelInstance = instance
diff --git a/ui/IdleStatusPanel.go b/ui/IdleStatusPanel.go
index a9bf56f..0535e46 100755
--- a/ui/IdleStatusPanel.go
+++ b/ui/IdleStatusPanel.go
@@ -29,7 +29,7 @@ type idleStatusPanel struct {
 func IdleStatusPanel(ui *UI) *idleStatusPanel {
 	if idleStatusPanelInstance == nil {
 		instance := &idleStatusPanel{
-			CommonPanel: NewTopLevelCommonPanel(ui, nil),
+			CommonPanel: NewTopLevelCommonPanel("IdleStatusPanel", ui),
 		}
 		instance.backgroundTask = utils.CreateBackgroundTask(time.Second * 2, instance.update)
 		instance.initialize()
@@ -88,7 +88,7 @@ func (this *idleStatusPanel) initialize() {
 func (this *idleStatusPanel) showFiles() {
 	logger.TraceEnter("IdleStatusPanel.showFiles()")
 
-	this.UI.GoToPanel(FilesPanel(this.UI, this))
+	this.UI.GoToPanel(FilesPanel(this.UI))
 
 	logger.TraceLeave("IdleStatusPanel.showFiles()")
 }
diff --git a/ui/MovePanel.go b/ui/MovePanel.go
index f4398d8..2323c99 100755
--- a/ui/MovePanel.go
+++ b/ui/MovePanel.go
@@ -2,7 +2,8 @@ package ui
 
 import (
 	// "github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
@@ -18,11 +19,10 @@ type movePanel struct {
 
 func MovePanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *movePanel {
 	if movePanelInstance == nil {
 		instance := &movePanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("MovePanel", ui),
 		}
 		instance.initialize()
 		movePanelInstance = instance
diff --git a/ui/NetworkPanel.go b/ui/NetworkPanel.go
index ffeb016..1feab9a 100755
--- a/ui/NetworkPanel.go
+++ b/ui/NetworkPanel.go
@@ -5,14 +5,16 @@ import (
 	"net"
 	"time"
 
+	"pifke.org/wpasupplicant"
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	// "github.com/Z-Bolt/OctoScreen/uiWidgets"
 	"github.com/Z-Bolt/OctoScreen/utils"
-	"pifke.org/wpasupplicant"
 )
 
+
 var networkPanelInstance *networkPanel
 
 type networkPanel struct {
@@ -25,11 +27,10 @@ type networkPanel struct {
 
 func NetworkPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *networkPanel {
 	if networkPanelInstance == nil {
 		instance := &networkPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("NetworkPanel", ui),
 		}
 		instance.initialize()
 		instance.backgroundTask = utils.CreateBackgroundTask(time.Second * 3, instance.update)
@@ -168,7 +169,7 @@ func (this *networkPanel) addNetwork(box *gtk.Box, ssid string) {
 	frame, _ := gtk.FrameNew("")
 
 	clicked := func() {
-		this.UI.GoToPanel(ConnectionPanel(this.UI, this, ssid))
+		this.UI.GoToPanel(ConnectionPanel(this.UI, ssid))
 	}
 
 	image := utils.MustImageFromFileWithSize("network.svg", this.Scaled(25), this.Scaled(25))
diff --git a/ui/PrintMenuPanel.go b/ui/PrintMenuPanel.go
index da7d8eb..f3a21d3 100755
--- a/ui/PrintMenuPanel.go
+++ b/ui/PrintMenuPanel.go
@@ -1,10 +1,11 @@
 package ui
 
 import (
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var printMenuPanelInstance *printMenuPanel
 
 type printMenuPanel struct {
@@ -13,11 +14,10 @@ type printMenuPanel struct {
 
 func PrintMenuPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *printMenuPanel {
 	if printMenuPanelInstance == nil {
 		instance := &printMenuPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("PrintMenuPanel", ui),
 		}
 		instance.initialize()
 		printMenuPanelInstance = instance
@@ -49,25 +49,25 @@ func (this *printMenuPanel) initialize() {
 }
 
 func (this *printMenuPanel) showMove() {
-	this.UI.GoToPanel(MovePanel(this.UI, this))
+	this.UI.GoToPanel(MovePanel(this.UI))
 }
 
 func (this *printMenuPanel) showFilament() {
-	this.UI.GoToPanel(FilamentPanel(this.UI, this))
+	this.UI.GoToPanel(FilamentPanel(this.UI))
 }
 
 func (this *printMenuPanel) showTemperature() {
-	this.UI.GoToPanel(TemperaturePanel(this.UI, this))
+	this.UI.GoToPanel(TemperaturePanel(this.UI))
 }
 
 func (this *printMenuPanel) showFan() {
-	this.UI.GoToPanel(FanPanel(this.UI, this))
+	this.UI.GoToPanel(FanPanel(this.UI))
 }
 
 func (this *printMenuPanel) showNetwork() {
-	this.UI.GoToPanel(NetworkPanel(this.UI, this))
+	this.UI.GoToPanel(NetworkPanel(this.UI))
 }
 
 func (this *printMenuPanel) showSystem() {
-	this.UI.GoToPanel(SystemPanel(this.UI, this))
+	this.UI.GoToPanel(SystemPanel(this.UI))
 }
diff --git a/ui/PrintStatusPanel.go b/ui/PrintStatusPanel.go
index 8a82bcb..cb39cc3 100755
--- a/ui/PrintStatusPanel.go
+++ b/ui/PrintStatusPanel.go
@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/gotk3/gotk3/gtk"
+
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
@@ -39,7 +40,7 @@ type printStatusPanel struct {
 func PrintStatusPanel(ui *UI) *printStatusPanel {
 	if printStatusPanelInstance == nil {
 		instance := &printStatusPanel{
-			CommonPanel: NewTopLevelCommonPanel(ui, nil),
+			CommonPanel: NewTopLevelCommonPanel("PrintStatusPanel", ui),
 		}
 
 		// TODO: revisit... some set the background task and then initialize
@@ -192,7 +193,7 @@ func (this *printStatusPanel) createControlButton() gtk.IWidget {
 		"printing-control.svg",
 		"color3",
 		func() {
-			this.UI.GoToPanel(PrintMenuPanel(this.UI, this))
+			this.UI.GoToPanel(PrintMenuPanel(this.UI))
 		},
 	)
 	return this.menuButton
diff --git a/ui/SplashPanel.go b/ui/SplashPanel.go
index 2e3e80e..cb2cd6a 100755
--- a/ui/SplashPanel.go
+++ b/ui/SplashPanel.go
@@ -3,6 +3,7 @@ package ui
 
 import (
 	"github.com/gotk3/gotk3/gtk"
+
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
@@ -15,7 +16,7 @@ type SplashPanel struct {
 
 func NewSplashPanel(ui *UI) *SplashPanel {
 	instane := &SplashPanel {
-		CommonPanel: NewCommonPanel(ui, nil),
+		CommonPanel: NewCommonPanel("SplashPanel", ui),
 	}
 	instane.initialize()
 
@@ -108,7 +109,7 @@ func (this *SplashPanel) releaseFromHold() {
 func (this *SplashPanel) showNetwork() {
 	logger.TraceEnter("SplashPanel.showNetwork()")
 
-	this.UI.GoToPanel(NetworkPanel(this.UI, this))
+	this.UI.GoToPanel(NetworkPanel(this.UI))
 
 	logger.TraceLeave("SplashPanel.showNetwork()")
 }
@@ -116,7 +117,7 @@ func (this *SplashPanel) showNetwork() {
 func (this *SplashPanel) showSystem() {
 	logger.TraceEnter("SplashPanel.showSystem()")
 
-	this.UI.GoToPanel(SystemPanel(this.UI, this))
+	this.UI.GoToPanel(SystemPanel(this.UI))
 
 	logger.TraceLeave("SplashPanel.showSystem()")
 }
diff --git a/ui/SystemPanel.go b/ui/SystemPanel.go
index e297950..b7c9ad6 100755
--- a/ui/SystemPanel.go
+++ b/ui/SystemPanel.go
@@ -3,11 +3,12 @@ package ui
 import (
 	// "time"
 
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
-	// "github.com/Z-Bolt/OctoScreen/utils"
+	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var systemPanelInstance *systemPanel = nil
 
 type systemPanel struct {
@@ -29,11 +30,10 @@ type systemPanel struct {
 
 func SystemPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *systemPanel {
 	if systemPanelInstance == nil {
 		instance := &systemPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("SystemPanel", ui),
 		}
 		instance.initialize()
 		instance.preShowCallback = instance.refreshSystemInformationInfoBox
@@ -51,7 +51,7 @@ func (this *systemPanel) initialize() {
 	this.octoPrintInfoBox = uiWidgets.CreateOctoPrintInfoBox(this.UI.Client, logoWidth)
 	this.Grid().Attach(this.octoPrintInfoBox,        0, 0, 1, 1)
 
-	this.octoScreenInfoBox = uiWidgets.CreateOctoScreenInfoBox(this.UI.Client, OctoScreenVersion)
+	this.octoScreenInfoBox = uiWidgets.CreateOctoScreenInfoBox(this.UI.Client, utils.OctoScreenVersion)
 	this.Grid().Attach(this.octoScreenInfoBox,       1, 0, 2, 1)
 
 	this.octoScreenPluginInfoBox = uiWidgets.CreateOctoScreenPluginInfoBox(this.UI.Client, this.UI.UIState, this.UI.OctoPrintPluginIsAvailable)
diff --git a/ui/TemperaturePanel.go b/ui/TemperaturePanel.go
index a772079..4e8eb04 100755
--- a/ui/TemperaturePanel.go
+++ b/ui/TemperaturePanel.go
@@ -2,11 +2,13 @@ package ui
 
 import (
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/uiWidgets"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var temperaturePanelInstance *temperaturePanel
 
 type temperaturePanel struct {
@@ -28,11 +30,10 @@ type temperaturePanel struct {
 
 func TemperaturePanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *temperaturePanel {
 	if temperaturePanelInstance == nil {
 		temperaturePanelInstance = &temperaturePanel{
-			CommonPanel:	NewCommonPanel(ui, parentPanel),
+			CommonPanel:	NewCommonPanel("TemperaturePanel", ui),
 		}
 		temperaturePanelInstance.initialize()
 	}
@@ -84,6 +85,6 @@ func (this *temperaturePanel) initialize() {
 }
 
 func (this *temperaturePanel) showTemperaturePresetsPanel() {
-	temperaturePresetsPanel := TemperaturePresetsPanel(this.UI, this, this.selectHotendStepButton)
+	temperaturePresetsPanel := TemperaturePresetsPanel(this.UI, this.selectHotendStepButton)
 	this.UI.GoToPanel(temperaturePresetsPanel)
 }
diff --git a/ui/TemperaturePresetsPanel.go b/ui/TemperaturePresetsPanel.go
index 47b6df2..98489f6 100755
--- a/ui/TemperaturePresetsPanel.go
+++ b/ui/TemperaturePresetsPanel.go
@@ -1,7 +1,7 @@
 package ui
 
 import (
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
@@ -9,6 +9,7 @@ import (
 	// "github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var temperaturePresetsPanelInstance *temperaturePresetsPanel
 
 type temperaturePresetsPanel struct {
@@ -20,12 +21,11 @@ type temperaturePresetsPanel struct {
 
 func TemperaturePresetsPanel(
 	ui						*UI,
-	parentPanel				interfaces.IPanel,
 	selectHotendStepButton	*uiWidgets.SelectToolStepButton,
 ) *temperaturePresetsPanel {
 	if temperaturePresetsPanelInstance == nil {
 		instance := &temperaturePresetsPanel {
-			CommonPanel:			NewCommonPanel(ui, parentPanel),
+			CommonPanel:			NewCommonPanel("temperaturePresetsPanel", ui),
 			selectHotendStepButton:	selectHotendStepButton,
 		}
 		instance.initialize()
@@ -37,9 +37,15 @@ func TemperaturePresetsPanel(
 
 func (this *temperaturePresetsPanel) initialize() {
 	defer this.Initialize()
+	this.createAllOffButton()
 	this.createTemperaturePresetButtons()
 }
 
+func (this *temperaturePresetsPanel) createAllOffButton() {
+	allOffButton := uiWidgets.CreateCoolDownButton(this.UI.Client, this.UI.GoToPreviousPanel)
+	this.AddButton(allOffButton)
+}
+
 func (this *temperaturePresetsPanel) createTemperaturePresetButtons() {
 	settings, err := (&octoprintApis.SettingsRequest{}).Do(this.UI.Client)
 	if err != nil {
@@ -47,11 +53,12 @@ func (this *temperaturePresetsPanel) createTemperaturePresetButtons() {
 		return
 	}
 
-	this.createAllOffButton()
+	// 12 (max) - Back button - All Off button = 10 available slots to display.
+	const maxSlots = 10
 
 	count := 0
 	for _, temperaturePreset := range settings.Temperature.TemperaturePresets {
-		if count < 10 {
+		if count < maxSlots {
 			temperaturePresetButton := uiWidgets.CreateTemperaturePresetButton(
 				this.UI.Client,
 				this.selectHotendStepButton,
@@ -63,10 +70,4 @@ func (this *temperaturePresetsPanel) createTemperaturePresetButtons() {
 			count++
 		}
 	}
-
-}
-
-func (this *temperaturePresetsPanel) createAllOffButton() {
-	allOffButton := uiWidgets.CreateCoolDownButton(this.UI.Client, this.UI.GoToPreviousPanel)
-	this.AddButton(allOffButton)
 }
diff --git a/ui/menu.go b/ui/menu.go
index 7e53555..500c14f 100755
--- a/ui/menu.go
+++ b/ui/menu.go
@@ -19,53 +19,53 @@ func getPanel(
 	switch menuItem.Panel {
 		// The standard "top four" panels that are in the idleStatus panel
 		case "home":
-			return HomePanel(ui, parentPanel)
+			return HomePanel(ui)
 
 		case "menu":
 			fallthrough
 		case "custom_items":
-			return CustomItemsPanel(ui, parentPanel, menuItem.Items)
+			return CustomItemsPanel(ui, menuItem.Items)
 
 		case "filament":
-			return FilamentPanel(ui, parentPanel)
+			return FilamentPanel(ui)
 
 		case "configuration":
-			return ConfigurationPanel(ui, parentPanel)
+			return ConfigurationPanel(ui)
 
 
 
 		case "files":
-			return FilesPanel(ui, parentPanel)
+			return FilesPanel(ui)
 
 		case "temperature":
-			return TemperaturePanel(ui, parentPanel)
+			return TemperaturePanel(ui)
 
 		case "control":
-			return ControlPanel(ui, parentPanel)
+			return ControlPanel(ui)
 
 		case "network":
-			return NetworkPanel(ui, parentPanel)
+			return NetworkPanel(ui)
 
 		case "move":
-			return MovePanel(ui, parentPanel)
+			return MovePanel(ui)
 
 		case "tool-changer":
-			return ToolChangerPanel(ui, parentPanel)
+			return ToolChangerPanel(ui)
 
 		case "system":
-			return SystemPanel(ui, parentPanel)
+			return SystemPanel(ui)
 
 		case "fan":
-			return FanPanel(ui, parentPanel)
+			return FanPanel(ui)
 
 		case "bed-level":
-			return BedLevelPanel(ui, parentPanel)
+			return BedLevelPanel(ui)
 
 		case "z-offset-calibration":
-			return ZOffsetCalibrationPanel(ui, parentPanel)
+			return ZOffsetCalibrationPanel(ui)
 
 		case "print-menu":
-			return PrintMenuPanel(ui, parentPanel)
+			return PrintMenuPanel(ui)
 
 
 		case "filament_multitool":
@@ -76,19 +76,19 @@ func getPanel(
 			logger.Warnf("WARNING! the '%s' panel has been deprecated.  Please use the 'filament' panel instead.", menuItem.Panel)
 			logger.Warnf("Support for the %s panel remains in this release, but will be removed in a future.", menuItem.Panel)
 			logger.Warn("Please update the custom menu structure in your OctoScreen settings in OctoPrint.")
-			return FilamentPanel(ui, parentPanel)
+			return FilamentPanel(ui)
 
 		case "toolchanger":
 			logger.Warn("WARNING! the 'toolchanger' panel has been renamed to 'tool-changer'.  Please use the 'tool-changer' panel instead.")
 			logger.Warnf("Support for the %s panel remains in this release, but will be removed in a future.", menuItem.Panel)
 			logger.Warn("Please update the custom menu structure in your OctoScreen settings in OctoPrint.")
-			return ToolChangerPanel(ui, parentPanel)
+			return ToolChangerPanel(ui)
 
 		case "nozzle-calibration":
 			logger.Warn("WARNING! the 'nozzle-calibration' panel has been deprecated.  Please use the 'z-offset-calibration' panel instead.")
 			logger.Warn("Support for the nozzle-calibration panel remains in this release, but will be removed in a future.")
 			logger.Warn("Please update the custom menu structure in your OctoScreen settings in OctoPrint.")
-			return ZOffsetCalibrationPanel(ui, parentPanel)
+			return ZOffsetCalibrationPanel(ui)
 
 		default:
 			logLevel := logger.LogLevel()
diff --git a/ui/tool_changer_panel.go b/ui/tool_changer_panel.go
index dc29fcb..9e9f648 100755
--- a/ui/tool_changer_panel.go
+++ b/ui/tool_changer_panel.go
@@ -4,7 +4,8 @@ import (
 	"fmt"
 
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
@@ -12,6 +13,7 @@ import (
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var toolChangerPanelInstance *toolChangerPanel
 
 type toolChangerPanel struct {
@@ -21,11 +23,10 @@ type toolChangerPanel struct {
 
 func ToolChangerPanel(
 	ui				*UI,
-	parentPanel		interfaces.IPanel,
 ) *toolChangerPanel {
 	if toolChangerPanelInstance == nil {
 		this := &toolChangerPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("ToolChangerPanel", ui),
 		}
 		this.initialize()
 		toolChangerPanelInstance = this
@@ -49,7 +50,7 @@ func (this *toolChangerPanel) initialize() {
 
 func (this *toolChangerPanel) createZCalibrationButton() gtk.IWidget {
 	button := utils.MustButtonImageStyle("Z Offsets", "z-calibration.svg", "color2", func() {
-		this.UI.GoToPanel(ZOffsetCalibrationPanel(this.UI, this))
+		this.UI.GoToPanel(ZOffsetCalibrationPanel(this.UI))
 	})
 
 	return button
diff --git a/ui/ui.go b/ui/ui.go
index 2f4b90e..e5e5aad 100755
--- a/ui/ui.go
+++ b/ui/ui.go
@@ -2,6 +2,8 @@ package ui
 
 import (
 	"fmt"
+	"os"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -100,7 +102,23 @@ func New(endpoint, key string, width, height int) *UI {
 	}
 
 	instance.splashPanel = NewSplashPanel(instance)
-	instance.backgroundTask = utils.CreateBackgroundTask(time.Second * 20, instance.update)
+
+	// Default timeout of 20 seconds.
+	durration := time.Second * 20
+
+	// Experimental, set the timeout based on config setting, but only if the config is pressent.
+	updateFrequency := os.Getenv("EXPERIMENTAL_UPDATE_FREQUENCY")
+	if updateFrequency != "" {
+		logger.Infof("Ui.New() - EXPERIMENTAL_UPDATE_FREQUENCY is present, frequency is %s", updateFrequency)
+		val, err := strconv.Atoi(updateFrequency)
+		if err == nil {
+			durration = time.Second * time.Duration(val)
+		} else {
+			logger.LogError("Ui.New()", "strconv.Atoi()", err)
+		}
+	}
+
+	instance.backgroundTask = utils.CreateBackgroundTask(durration, instance.update)
 	instance.initialize()
 
 	logger.TraceLeave("ui.New()")
@@ -523,6 +541,8 @@ func (this *UI) GoToPreviousPanel() {
 func (this *UI) SetUiToPanel(panel interfaces.IPanel) {
 	logger.TraceEnter("ui.SetUiToPanel()")
 
+	logger.Infof("Setting panel to %q", panel.Name())
+
 	stackLength := this.PanelHistory.Len()
 	if stackLength > 0 {
 		currentPanel := this.PanelHistory.Peek().(interfaces.IPanel)
diff --git a/ui/z_offset_calibration_panel.go b/ui/z_offset_calibration_panel.go
index e0ab17c..7cefa6f 100755
--- a/ui/z_offset_calibration_panel.go
+++ b/ui/z_offset_calibration_panel.go
@@ -6,7 +6,8 @@ import (
 	"time"
 
 	"github.com/gotk3/gotk3/gtk"
-	"github.com/Z-Bolt/OctoScreen/interfaces"
+
+	// "github.com/Z-Bolt/OctoScreen/interfaces"
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	// "github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
@@ -14,6 +15,7 @@ import (
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 var zOffsetCalibrationPanelInstance *zOffsetCalibrationPanel
 
 type pointCoordinates struct {
@@ -43,11 +45,10 @@ type zOffsetCalibrationPanel struct {
 
 func ZOffsetCalibrationPanel(
 	ui 					*UI,
-	parentPanel 		interfaces.IPanel,
 ) *zOffsetCalibrationPanel {
 	if zOffsetCalibrationPanelInstance == nil {
 		instane := &zOffsetCalibrationPanel {
-			CommonPanel: NewCommonPanel(ui, parentPanel),
+			CommonPanel: NewCommonPanel("ZOffsetCalibrationPanel", ui),
 		}
 		instane.cPoint = pointCoordinates {
 			x: 20,
diff --git a/uiWidgets/CommandButton.go b/uiWidgets/CommandButton.go
index 030d4c8..2ed5dd8 100755
--- a/uiWidgets/CommandButton.go
+++ b/uiWidgets/CommandButton.go
@@ -4,12 +4,14 @@ import (
 	// "fmt"
 
 	"github.com/gotk3/gotk3/gtk"
+
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 type CommandButton struct {
 	*gtk.Button
 
@@ -24,7 +26,12 @@ func CreateCommandButton(
 	commandDefinition	*dataModels.CommandDefinition,
 	iconName			string,
 ) *CommandButton {
-	base := utils.MustButtonImage(utils.StrEllipsisLen(commandDefinition.Name, 16), iconName + ".svg", nil)
+	style := ""
+	if commandRequiresConfirmation(commandDefinition) {
+		style = "color-warning-sign-yellow"
+	}
+	base := utils.MustButtonImageStyle(utils.StrEllipsisLen(commandDefinition.Name, 16), iconName + ".svg", style, nil)
+
 	instance := &CommandButton {
 		Button:				base,
 		client:				client,
@@ -40,11 +47,15 @@ func CreateCommandButton(
 	return instance
 }
 
+func commandRequiresConfirmation(commandDefinition *dataModels.CommandDefinition) bool {
+	return commandDefinition != nil && len(commandDefinition.Confirm) > 0
+}
+
 func (this *CommandButton) handleClicked() {
-	if len(this.commandDefinition.Confirm) != 0 {
+	if commandRequiresConfirmation(this.commandDefinition) {
 		utils.MustConfirmDialogBox(
 			this.parentWindow,
-			this.commandDefinition.Confirm,
+			this.commandDefinition.Confirm + "\n\nAre you sure you want to proceed?",
 			this.sendCommand,
 		)()
 	} else {
diff --git a/uiWidgets/ControlButton.go b/uiWidgets/ControlButton.go
index 232abed..575639e 100755
--- a/uiWidgets/ControlButton.go
+++ b/uiWidgets/ControlButton.go
@@ -4,12 +4,14 @@ import (
 	// "fmt"
 
 	"github.com/gotk3/gotk3/gtk"
+
 	"github.com/Z-Bolt/OctoScreen/logger"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis"
 	"github.com/Z-Bolt/OctoScreen/octoprintApis/dataModels"
 	"github.com/Z-Bolt/OctoScreen/utils"
 )
 
+
 type ControlButton struct {
 	*gtk.Button
 
@@ -24,7 +26,12 @@ func CreateControlButton(
 	controlDefinition	*dataModels.ControlDefinition,
 	iconName			string,
 ) *ControlButton {
-	base := utils.MustButtonImage(utils.StrEllipsisLen(controlDefinition.Name, 16), iconName + ".svg", nil)
+	style := ""
+	if controlRequiresConfirmation(controlDefinition) {
+		style = "color-warning-sign-yellow"
+	}
+	base := utils.MustButtonImageStyle(utils.StrEllipsisLen(controlDefinition.Name, 16), iconName + ".svg", style, nil)
+
 	instance := &ControlButton {
 		Button:				base,
 		client:				client,
@@ -40,11 +47,15 @@ func CreateControlButton(
 	return instance
 }
 
+func controlRequiresConfirmation(controlDefinition *dataModels.ControlDefinition) bool {
+	return controlDefinition != nil && len(controlDefinition.Confirm) > 0
+}
+
 func (this *ControlButton) handleClicked() {
-	if len(this.controlDefinition.Confirm) != 0 {
+	if controlRequiresConfirmation(this.controlDefinition) {
 		utils.MustConfirmDialogBox(
 			this.parentWindow,
-			this.controlDefinition.Confirm,
+			this.controlDefinition.Confirm + "\n\nAre you sure you want to proceed?",
 			this.sendCommand,
 		)()
 	} else {
@@ -54,7 +65,7 @@ func (this *ControlButton) handleClicked() {
 
 func (this *ControlButton) sendCommand() {
 	logger.Infof("ControlButton.sendCommand(), now sending command %q", this.controlDefinition.Name)
-	
+
 	commandRequest := &octoprintApis.CommandRequest{
 		Commands: this.controlDefinition.Commands,
 	}
diff --git a/utils/environment.go b/utils/environment.go
index c9b9448..476dcfd 100755
--- a/utils/environment.go
+++ b/utils/environment.go
@@ -10,6 +10,9 @@ import (
 )
 
 
+// OctoScreenVersion is set during compilation.
+var OctoScreenVersion = "2.7.3"
+
 const MISSING_ENV_TOKEN = ">>MISSING<<"
 const INVALID_ENV_TOKEN = "!!!INVALID!!!"
 
@@ -83,6 +86,13 @@ func NameOfMissingRequiredEnvironmentVariable(apiKey string) string {
 	return "UNKNOWN"
 }
 
+func DumpSystemInformation() {
+	logger.Info("System Information...")
+	logger.Infof("OctoScreen version: %q", OctoScreenVersion)
+	// More system stats to come...
+	logger.Info("")
+}
+
 func DumpEnvironmentVariables() {
 	logger.Info("Environment variables...")
 
@@ -101,11 +111,10 @@ func DumpEnvironmentVariables() {
 	// 8. make sure what's dumped to the log is correct, for both when present and when missing.
 	dumpObfuscatedEnvironmentVariable(EnvAPIKey)
 
-
 	dumpEnvironmentVariable(EnvStylePath)
+	logger.Info("")
 
 	// Optional environment variables
-	logger.Info("")
 	logger.Info("Optional environment variables:")
 	dumpEnvironmentVariable(EnvConfigFile)
 	dumpEnvironmentVariable(EnvLogFilePath)
@@ -116,6 +125,7 @@ func DumpEnvironmentVariables() {
 	// default to the values defined in globalVars.go.
 
 	dumpEnvironmentVariable(EnvDisplayCursor)
+	logger.Info("")
 }
 
 func dumpEnvironmentVariable(key string) {