Go and Fyne-需要对话框的响应和启用/禁用提交按钮
刚开始看Go和Fyne。使用从示例中获得的信息编写测试CRUD程序后，我需要解决以下问题：Go and Fyne-需要对话框的响应和启用/禁用提交按钮,go,dialog,fyne,Go,Dialog,Fyne,刚开始看Go和Fyne。使用从示例中获得的信息编写测试CRUD程序后，我需要解决以下问题： 我需要一个初始对话框或类似对话框，以允许选择现有记录或“新建”以指示新记录。我现有的对话框不能充分处理这个问题 如果数据没有更改，我需要能够启用/禁用提交按钮以允许或不允许更新 程序编译无误，但“go vet”和VsCode指示（例如，对于行）： 作为Go和Fyne的新手，可能存在一些根本性的错误 测试程序如下： package main // Dependency: local directory "d
package main
// Dependency: local directory "data".
import (
"errors"
"io/ioutil"
"log"
"os"
"strings"
"fyne.io/fyne"
"fyne.io/fyne/app"
"fyne.io/fyne/dialog"
"fyne.io/fyne/layout"
"fyne.io/fyne/widget"
)
const BY_SEP byte = byte('|')
const I_ARRAY_LEN int = 10
const I_NDX_GIVEN int = 0
const I_NDX_FAMILY int = 1
const I_NDX_TITLE int = 2
const I_NDX_ADDR1 int = 3
const I_NDX_ADDR2 int = 4
const I_NDX_ADDR3 int = 5
const I_NDX_STATE int = 6
const I_NDX_ZIP int = 7
const I_NDX_TELE1 int = 8
const I_NDX_TELE2 int = 9
var _arsOldData [I_ARRAY_LEN]string
var _arsNewData [I_ARRAY_LEN]string
var _tfDataHasChanged bool
var _sKey string
var _arwEntryWidgets [I_ARRAY_LEN]*widget.Entry
var _wApp fyne.App
var _wWindow fyne.Window
var _wModal widget.PopUp
var _wFormKeyEntry widget.Form
//-------------------------------------------------------------------------------
func main() {
log.Println("In fytest01")
_, err := os.Stat("./data/")
if err != nil {
log.Println("You need to create directory: 'data'")
os.Exit(1)
}
//fnReadData()
_wApp := app.New()
_wWindow := _wApp.NewWindow("Customer Details")
//_wFormKeyEntry := fnCreateKeyForm()
wFormMain := fnCreateMainForm()
//_wModal := widget.NewModalPopUp(_wFormKeyEntry, _wWindow.Canvas())
_wWindow.Resize(fyne.NewSize(500, 400))
_wWindow.CenterOnScreen()
_wWindow.SetContent(widget.NewVBox(
wFormMain,
widget.NewGroup("",
fyne.NewContainerWithLayout(layout.NewGridLayout(2),
widget.NewButton("Exit", func() {
_wApp.Quit()
}),
widget.NewButton("Submit", func() {
log.Println("Submit button pressed")
err := fnUpdateData()
if err == nil {
dialog.ShowInformation("Information", "Data was updated", _wWindow)
wEntryForKey := widget.NewEntry()
wEntryForKey.SetPlaceHolder("Enter Key (4) : ")
wEntryForKey.OnChanged = func(sKey string) {
log.Println("Entered", sKey)
if len(sKey) == 4 {
_sKey = sKey
}
if len(_sKey) == 4 {
dialog.ShowInformation("Information", "Key "+_sKey+" has been entered - press OK", _wWindow)
fnReadData()
fnRefreshWidgetData()
}
}
dialog.ShowCustom("Enter Customer Key", "OK", wEntryForKey, _wWindow)
} else {
dialog.ShowError(err, _wWindow)
}
}),
))),
)
//fnShowKeyEntryDialog()
wEntryForKey := widget.NewEntry()
wEntryForKey.SetPlaceHolder("Enter Key (4) : ")
wEntryForKey.OnChanged = func(sKey string) {
log.Println("Entered", sKey)
if len(sKey) == 4 {
_sKey = sKey
}
if len(_sKey) == 4 {
dialog.ShowInformation("Information", "Key "+_sKey+" has been entered - press OK", _wWindow)
fnReadData()
fnRefreshWidgetData()
}
}
dialog.ShowCustom("Enter Customer Key", "OK", wEntryForKey, _wWindow)
_wWindow.ShowAndRun()
//_wModal.Show()
}
//-------------------------------------------------------------------------------
func fnCreateAllEntryWidgets() {
_arwEntryWidgets[I_NDX_GIVEN] = fnCreateSingleEntryWidget(I_NDX_GIVEN)
_arwEntryWidgets[I_NDX_FAMILY] = fnCreateSingleEntryWidget(I_NDX_FAMILY)
_arwEntryWidgets[I_NDX_TITLE] = fnCreateSingleEntryWidget(I_NDX_TITLE)
_arwEntryWidgets[I_NDX_ADDR1] = fnCreateSingleEntryWidget(I_NDX_ADDR1)
_arwEntryWidgets[I_NDX_ADDR2] = fnCreateSingleEntryWidget(I_NDX_ADDR2)
_arwEntryWidgets[I_NDX_ADDR3] = fnCreateSingleEntryWidget(I_NDX_ADDR3)
_arwEntryWidgets[I_NDX_STATE] = fnCreateSingleEntryWidget(I_NDX_STATE)
_arwEntryWidgets[I_NDX_ZIP] = fnCreateSingleEntryWidget(I_NDX_ZIP)
_arwEntryWidgets[I_NDX_TELE1] = fnCreateSingleEntryWidget(I_NDX_TELE1)
_arwEntryWidgets[I_NDX_TELE2] = fnCreateSingleEntryWidget(I_NDX_TELE2)
}
//-------------------------------------------------------------------------------
func fnCreateSingleEntryWidget(iNdxData int) *widget.Entry {
wEntry := widget.NewEntry()
wEntry.SetText(_arsOldData[iNdxData])
wEntry.OnChanged = func(sText string) {
_arsNewData[iNdxData] = sText
fnCheckIfDataHasChanged()
}
return wEntry
}
//-------------------------------------------------------------------------------
func fnCreateFormFields(arwWidgets [I_ARRAY_LEN]*widget.Entry) []*widget.FormItem {
return []*widget.FormItem{
{"Given Names:", arwWidgets[I_NDX_GIVEN]},
{"Family Name: ", arwWidgets[I_NDX_FAMILY]},
{"Title: ", arwWidgets[I_NDX_TITLE]},
{"Address Ln 1: ", arwWidgets[I_NDX_ADDR1]},
{" '' Ln 2: ", arwWidgets[I_NDX_ADDR2]},
{" '' Ln 3: ", arwWidgets[I_NDX_ADDR3]},
{" '' State ", arwWidgets[I_NDX_STATE]},
{" '' Zip: ", arwWidgets[I_NDX_ZIP]},
{"Telephone 1: ", arwWidgets[I_NDX_TELE1]},
{"Telephone 2: ", arwWidgets[I_NDX_TELE2]},
}
}
//-------------------------------------------------------------------------------
func fnCheckIfDataHasChanged() {
var tfChanged bool = false
for iNdxData := 0; !tfChanged && iNdxData < len(_arsOldData); iNdxData++ {
tfChanged = (_arsNewData[iNdxData] != _arsOldData[iNdxData])
}
if tfChanged != _tfDataHasChanged {
_tfDataHasChanged = tfChanged
if tfChanged {
// COULD NOT CREATE _wBtnSubmitMain AS A GLOBAL VARIABLE.
//_wBtnSubmitMain.Show()
//_wBtnSubmitMain.Enable()
} else {
//_wBtnSubmitMain.Disable()
//_wBtnSubmitMain.Hide()
}
}
}
//-------------------------------------------------------------------------------
func fnReadData() {
_tfDataHasChanged = false
log.Println("fnReadData: Key = " + _sKey)
var sData string
if len(_sKey) > 0 {
arbData, _ := ioutil.ReadFile("./data/" + _sKey)
if arbData != nil {
sData = string(arbData)
}
}
log.Println("fnReadData: sData = " + sData)
/* CLEAR OLD DATA */
for iNdxData := 0; iNdxData < I_ARRAY_LEN; iNdxData++ {
_arsOldData[iNdxData] = ""
}
/* POPULATE DATA IF ANY */
var iNdx1 int = 0
var iNdxData int = 0
var iLen int = len(sData)
for iNdx2 := 0; iNdx2 < len(sData); iNdx2++ {
if sData[iNdx2] == BY_SEP {
_arsOldData[iNdxData] = sData[iNdx1:iNdx2]
iNdx1 = iNdx2 + 1
iNdxData++
} else if iNdx2 == (iLen - 1) {
_arsOldData[iNdxData] = sData[iNdx1 : iNdx2+1]
}
}
for iNdx := 0; iNdx < I_ARRAY_LEN; iNdx++ {
_arsNewData[iNdx] = _arsOldData[iNdx]
}
}
//-------------------------------------------------------------------------------
func fnUpdateData() error {
if !_tfDataHasChanged {
return errors.New("Data has not changed")
}
if len(_sKey) < 1 {
_sKey = "9999"
//dialog.ShowInformation("Information", "Default key of 9999 was used", _wWindow) // CAUSES ERROR
}
var sNewData string = ""
for iNdxData, sVal := range _arsNewData {
if strings.Index(sVal, "|") >= 0 {
sVal = strings.ReplaceAll(sVal, "|", ":")
}
if iNdxData != I_ARRAY_LEN-1 {
sNewData += sVal + string(BY_SEP)
} else {
sNewData += sVal
}
}
log.Println("New Data = " + sNewData)
var err error = ioutil.WriteFile("./data/"+_sKey, []byte(sNewData), 0644)
if err == nil {
for iNdxData := 0; iNdxData < len(_arsNewData); iNdxData++ {
_arsOldData[iNdxData] = _arsNewData[iNdxData]
}
fnCheckIfDataHasChanged()
}
return err
}
//-------------------------------------------------------------------------------
func fnCreateKeyForm() *widget.Form {
wEntryKey := widget.NewEntry()
return &widget.Form{
Items: []*widget.FormItem{
{"Key:", wEntryKey}},
OnSubmit: func() {
_sKey = wEntryKey.Text
log.Println("Key = " + _sKey)
fnReadData()
log.Println("Data has been read")
fnRefreshWidgetData()
_wFormKeyEntry.Hide()
//_wModal.Hide()
},
}
}
//-------------------------------------------------------------------------------
//func fnCreateMainWindow() {
// log.Println("Creating Main Window Form")
// wFormMain := fnCreateMainForm()
// log.Println("Creating Main Window Window")
// _wWindow.SetContent( //widget.NewVBox(
// wFormMain,
// )
//}
//-------------------------------------------------------------------------------
func fnCreateMainForm() *widget.Form {
log.Println("Create form1 widgets")
fnCreateAllEntryWidgets()
log.Println("Create form1 FormFields")
arwFormFields := fnCreateFormFields(_arwEntryWidgets)
log.Println("Creating Form1")
return &widget.Form{
Items: arwFormFields,
}
}
//-------------------------------------------------------------------------------
func fnRefreshWidgetData() {
for iNdx := 0; iNdx < I_ARRAY_LEN; iNdx++ {
_arwEntryWidgets[iNdx].SetText(_arsNewData[iNdx])
}
}
主程序包
//依赖项：本地目录“数据”。
进口(
“错误”
“io/ioutil”
“日志”
“操作系统”
“字符串”
“fyne.io/fyne”
“fyne.io/fyne/app”
“fyne.io/fyne/dialog”
“fyne.io/fyne/layout”
“fyne.io/fyne/widget”
)
const BY_SEP byte=字节（“|”）
常数I_数组长度int=10
给定int=0的常数I\u NDX\u
常数I_NDX_族int=1
const I_NDX_TITLE int=2
常数I\u NDX\u ADDR1 int=3
常数I\u NDX\u ADDR2 int=4
常数I\u NDX\u ADDR3 int=5
常数I_NDX_状态int=6
常数I\u NDX\u ZIP int=7
const I_NDX_TELE1 int=8
const I_NDX_TELE2 int=9
var\u arsOldData[I\u ARRAY\u LEN]字符串
var\u arsNewData[I\u ARRAY\u LEN]字符串
变量tfDataHasChanged bool
var_sKey字符串
var\u arwEntryWidgets[I\u ARRAY\u LEN]*widget.Entry
var_wApp fyne.App
变量wWindow fyne.窗口
var\u wModal widget.PopUp
var\u wFormKeyEntry小部件。表单
//-------------------------------------------------------------------------------
func main（）{
log.Println（“在fytest01中”）
_，err:=os.Stat（“./data/”）
如果错误！=零{
Println（“您需要创建目录：'data'”）
操作系统退出（1）
}
//fnReadData（）
_wApp:=app.New（）
_wWindow:=\u wApp.NewWindow（“客户详细信息”）
//_wFormKeyEntry:=fnCreateKeyForm（）
wFormMain:=fnCreateMainForm（）
//_wModal:=widget.NewModalPopUp（\u wFormKeyEntry，\u wWindow.Canvas（））
_wWindow.Resize（fyne.NewSize（500400））
_wWindow.CenterOnScreen（）
_wWindow.SetContent（widget.NewVBox(
弗曼，
widget.NewGroup（“，
fyne.新集装箱布局（布局。新网格布局（2），
widget.NewButton（“退出”，func（）{
_wApp.Quit（）
}),
widget.NewButton（“提交”，func（）{
log.Println（“按下提交按钮”）
错误：=fnUpdateData（）
如果err==nil{
对话框。显示信息（“信息”，“数据已更新”，\u wWindow）
WentryWorkey:=widget.NewEntry（）
SetPlaceHolder（“输入键（4）：”）
WentryWorkey.OnChanged=func（sKey字符串）{
log.Println（“已输入”，sKey）
如果len（sKey）==4{
_sKey=sKey
}
如果len（_sKey）==4{
对话框。显示信息（“信息”，“键”+_sKey+”已输入-按“确定”，_wWindow）
fnReadData（）
fnRefreshWidgetData（）
}
}
对话框.ShowCustom（“输入客户密钥”、“确定”、WentryWorkey、\u wWindow）
}否则{
对话。淋浴错误（错误，错误）
}
}),
))),
)
//fnShowKeyEntryDialog（）
WentryWorkey:=widget.NewEntry（）
SetPlaceHolder（“输入键（4）：”）
WentryWorkey.OnChanged=func（sKey字符串）{
log.Println（“已输入”，sKey）
如果len（sKey）==4{
_sKey=sKey
}
如果len（_sKey）==4{
对话框。显示信息（“信息”，“键”+_sKey+”已输入-按“确定”，_wWindow）
fnReadData（）
fnRefreshWidgetData（）
}
}
对话框.ShowCustom（“输入客户密钥”、“确定”、WentryWorkey、\u wWindow）
_wWindow.ShowAndRun（）
//_wModal.Show（）
}
//-------------------------------------------------------------------------------
func fnCreateAllEntryWidgets（）{
_arwEntryWidgets[I\u NDX\u给定]=fnCreateSingleEntryWidget（I\u NDX\u给定）
_arwEntryWidgets[I\u NDX\u FAMILY]=fnCreateSingleEntryWidget（I\u NDX\u FAMILY）
_arwEntryWidgets[I\u NDX\u TITLE]=fnCreateSingleEntryWidget（I\u NDX\u TITLE）
_arwEntryWidgets[I\u NDX\u ADDR1]=fnCreateSingleEntryWidget（I\u NDX\u ADDR1）
_arwEntryWidgets[I\u NDX\u ADDR2]=fnCreateSingleEntryWidget（I\u NDX\u ADDR2）
_arwEntryWidgets[I\u NDX\u ADDR3]=fnCreateSingleEntryWidget（I\u NDX\u ADDR3）
_arwEntryWidgets[I\u NDX\u STATE]=fnCreateSingleEntryWidget（I\u NDX\u STATE）
_arwEntryWidgets[I\u NDX\u ZIP]=fnCreateSingleEntryWidget（I\u NDX\u ZIP）
_arwEntryWidgets[I_NDX_TELE1]=fnCreateSingleEntryWidget（I_NDX_TELE1）
_arwEntryWidgets[I_NDX_TELE2]=fnCreateSingleEntryWidget（I_NDX_TELE2）
}
//-------------------------------------------------------------------------------
func fnCreateSingleEntryWidget（iNdxData int）*widget.Entry{
wEntry:=widget.NewEntry（）
wEntry.SetText（_arsOldData[iNdxData]）
wEntry.OnChanged=func（sText字符串）{
_arsNewData[iNdxData]=sText
fnCheckIfDataHasChanged（）
}
返回温特里
}
//-------------------------------------------------------------------------------
func fnCreateFormFields（arwWidgets[I_ARRAY\u LEN]*widget.Entry）[]*widget.FormItem{
return[]*widget.FormItem{
{“给定名称：”，arwWidgets[I_NDX_给定]}，
{“姓氏：”，arwWidgets[I_NDX_Family]}，
{“Title:，arwWidgets[I_NDX_Title]}，
{“地址LN1:”，arwWidgets[I_NDX_ADDR1]}，
{'''ln2:，arwWidgets[I_NDX_ADDR2]}，
{'''ln3:，arwWidgets[I_NDX_ADDR3]
go vet shows:
ERROR: "unknown field 'Key' in struct literal of type widget.FormItem",
however, if I include a key, compiler fails.
package main
// Dependency: local directory "data".
import (
"errors"
"io/ioutil"
"log"
"os"
"strings"
"fyne.io/fyne"
"fyne.io/fyne/app"
"fyne.io/fyne/dialog"
"fyne.io/fyne/layout"
"fyne.io/fyne/widget"
)
const BY_SEP byte = byte('|')
const I_ARRAY_LEN int = 10
const I_NDX_GIVEN int = 0
const I_NDX_FAMILY int = 1
const I_NDX_TITLE int = 2
const I_NDX_ADDR1 int = 3
const I_NDX_ADDR2 int = 4
const I_NDX_ADDR3 int = 5
const I_NDX_STATE int = 6
const I_NDX_ZIP int = 7
const I_NDX_TELE1 int = 8
const I_NDX_TELE2 int = 9
var _arsOldData [I_ARRAY_LEN]string
var _arsNewData [I_ARRAY_LEN]string
var _tfDataHasChanged bool
var _sKey string
var _arwEntryWidgets [I_ARRAY_LEN]*widget.Entry
var _wApp fyne.App
var _wWindow fyne.Window
var _wModal widget.PopUp
var _wFormKeyEntry widget.Form
//-------------------------------------------------------------------------------
func main() {
log.Println("In fytest01")
_, err := os.Stat("./data/")
if err != nil {
log.Println("You need to create directory: 'data'")
os.Exit(1)
}
//fnReadData()
_wApp := app.New()
_wWindow := _wApp.NewWindow("Customer Details")
//_wFormKeyEntry := fnCreateKeyForm()
wFormMain := fnCreateMainForm()
//_wModal := widget.NewModalPopUp(_wFormKeyEntry, _wWindow.Canvas())
_wWindow.Resize(fyne.NewSize(500, 400))
_wWindow.CenterOnScreen()
_wWindow.SetContent(widget.NewVBox(
wFormMain,
widget.NewGroup("",
fyne.NewContainerWithLayout(layout.NewGridLayout(2),
widget.NewButton("Exit", func() {
_wApp.Quit()
}),
widget.NewButton("Submit", func() {
log.Println("Submit button pressed")
err := fnUpdateData()
if err == nil {
dialog.ShowInformation("Information", "Data was updated", _wWindow)
wEntryForKey := widget.NewEntry()
wEntryForKey.SetPlaceHolder("Enter Key (4) : ")
wEntryForKey.OnChanged = func(sKey string) {
log.Println("Entered", sKey)
if len(sKey) == 4 {
_sKey = sKey
}
if len(_sKey) == 4 {
dialog.ShowInformation("Information", "Key "+_sKey+" has been entered - press OK", _wWindow)
fnReadData()
fnRefreshWidgetData()
}
}
dialog.ShowCustom("Enter Customer Key", "OK", wEntryForKey, _wWindow)
} else {
dialog.ShowError(err, _wWindow)
}
}),
))),
)
//fnShowKeyEntryDialog()
wEntryForKey := widget.NewEntry()
wEntryForKey.SetPlaceHolder("Enter Key (4) : ")
wEntryForKey.OnChanged = func(sKey string) {
log.Println("Entered", sKey)
if len(sKey) == 4 {
_sKey = sKey
}
if len(_sKey) == 4 {
dialog.ShowInformation("Information", "Key "+_sKey+" has been entered - press OK", _wWindow)
fnReadData()
fnRefreshWidgetData()
}
}
dialog.ShowCustom("Enter Customer Key", "OK", wEntryForKey, _wWindow)
_wWindow.ShowAndRun()
//_wModal.Show()
}
//-------------------------------------------------------------------------------
func fnCreateAllEntryWidgets() {
_arwEntryWidgets[I_NDX_GIVEN] = fnCreateSingleEntryWidget(I_NDX_GIVEN)
_arwEntryWidgets[I_NDX_FAMILY] = fnCreateSingleEntryWidget(I_NDX_FAMILY)
_arwEntryWidgets[I_NDX_TITLE] = fnCreateSingleEntryWidget(I_NDX_TITLE)
_arwEntryWidgets[I_NDX_ADDR1] = fnCreateSingleEntryWidget(I_NDX_ADDR1)
_arwEntryWidgets[I_NDX_ADDR2] = fnCreateSingleEntryWidget(I_NDX_ADDR2)
_arwEntryWidgets[I_NDX_ADDR3] = fnCreateSingleEntryWidget(I_NDX_ADDR3)
_arwEntryWidgets[I_NDX_STATE] = fnCreateSingleEntryWidget(I_NDX_STATE)
_arwEntryWidgets[I_NDX_ZIP] = fnCreateSingleEntryWidget(I_NDX_ZIP)
_arwEntryWidgets[I_NDX_TELE1] = fnCreateSingleEntryWidget(I_NDX_TELE1)
_arwEntryWidgets[I_NDX_TELE2] = fnCreateSingleEntryWidget(I_NDX_TELE2)
}
//-------------------------------------------------------------------------------
func fnCreateSingleEntryWidget(iNdxData int) *widget.Entry {
wEntry := widget.NewEntry()
wEntry.SetText(_arsOldData[iNdxData])
wEntry.OnChanged = func(sText string) {
_arsNewData[iNdxData] = sText
fnCheckIfDataHasChanged()
}
return wEntry
}
//-------------------------------------------------------------------------------
func fnCreateFormFields(arwWidgets [I_ARRAY_LEN]*widget.Entry) []*widget.FormItem {
return []*widget.FormItem{
{"Given Names:", arwWidgets[I_NDX_GIVEN]},
{"Family Name: ", arwWidgets[I_NDX_FAMILY]},
{"Title: ", arwWidgets[I_NDX_TITLE]},
{"Address Ln 1: ", arwWidgets[I_NDX_ADDR1]},
{" '' Ln 2: ", arwWidgets[I_NDX_ADDR2]},
{" '' Ln 3: ", arwWidgets[I_NDX_ADDR3]},
{" '' State ", arwWidgets[I_NDX_STATE]},
{" '' Zip: ", arwWidgets[I_NDX_ZIP]},
{"Telephone 1: ", arwWidgets[I_NDX_TELE1]},
{"Telephone 2: ", arwWidgets[I_NDX_TELE2]},
}
}
//-------------------------------------------------------------------------------
func fnCheckIfDataHasChanged() {
var tfChanged bool = false
for iNdxData := 0; !tfChanged && iNdxData < len(_arsOldData); iNdxData++ {
tfChanged = (_arsNewData[iNdxData] != _arsOldData[iNdxData])
}
if tfChanged != _tfDataHasChanged {
_tfDataHasChanged = tfChanged
if tfChanged {
// COULD NOT CREATE _wBtnSubmitMain AS A GLOBAL VARIABLE.
//_wBtnSubmitMain.Show()
//_wBtnSubmitMain.Enable()
} else {
//_wBtnSubmitMain.Disable()
//_wBtnSubmitMain.Hide()
}
}
}
//-------------------------------------------------------------------------------
func fnReadData() {
_tfDataHasChanged = false
log.Println("fnReadData: Key = " + _sKey)
var sData string
if len(_sKey) > 0 {
arbData, _ := ioutil.ReadFile("./data/" + _sKey)
if arbData != nil {
sData = string(arbData)
}
}
log.Println("fnReadData: sData = " + sData)
/* CLEAR OLD DATA */
for iNdxData := 0; iNdxData < I_ARRAY_LEN; iNdxData++ {
_arsOldData[iNdxData] = ""
}
/* POPULATE DATA IF ANY */
var iNdx1 int = 0
var iNdxData int = 0
var iLen int = len(sData)
for iNdx2 := 0; iNdx2 < len(sData); iNdx2++ {
if sData[iNdx2] == BY_SEP {
_arsOldData[iNdxData] = sData[iNdx1:iNdx2]
iNdx1 = iNdx2 + 1
iNdxData++
} else if iNdx2 == (iLen - 1) {
_arsOldData[iNdxData] = sData[iNdx1 : iNdx2+1]
}
}
for iNdx := 0; iNdx < I_ARRAY_LEN; iNdx++ {
_arsNewData[iNdx] = _arsOldData[iNdx]
}
}
//-------------------------------------------------------------------------------
func fnUpdateData() error {
if !_tfDataHasChanged {
return errors.New("Data has not changed")
}
if len(_sKey) < 1 {
_sKey = "9999"
//dialog.ShowInformation("Information", "Default key of 9999 was used", _wWindow) // CAUSES ERROR
}
var sNewData string = ""
for iNdxData, sVal := range _arsNewData {
if strings.Index(sVal, "|") >= 0 {
sVal = strings.ReplaceAll(sVal, "|", ":")
}
if iNdxData != I_ARRAY_LEN-1 {
sNewData += sVal + string(BY_SEP)
} else {
sNewData += sVal
}
}
log.Println("New Data = " + sNewData)
var err error = ioutil.WriteFile("./data/"+_sKey, []byte(sNewData), 0644)
if err == nil {
for iNdxData := 0; iNdxData < len(_arsNewData); iNdxData++ {
_arsOldData[iNdxData] = _arsNewData[iNdxData]
}
fnCheckIfDataHasChanged()
}
return err
}
//-------------------------------------------------------------------------------
func fnCreateKeyForm() *widget.Form {
wEntryKey := widget.NewEntry()
return &widget.Form{
Items: []*widget.FormItem{
{"Key:", wEntryKey}},
OnSubmit: func() {
_sKey = wEntryKey.Text
log.Println("Key = " + _sKey)
fnReadData()
log.Println("Data has been read")
fnRefreshWidgetData()
_wFormKeyEntry.Hide()
//_wModal.Hide()
},
}
}
//-------------------------------------------------------------------------------
//func fnCreateMainWindow() {
// log.Println("Creating Main Window Form")
// wFormMain := fnCreateMainForm()
// log.Println("Creating Main Window Window")
// _wWindow.SetContent( //widget.NewVBox(
// wFormMain,
// )
//}
//-------------------------------------------------------------------------------
func fnCreateMainForm() *widget.Form {
log.Println("Create form1 widgets")
fnCreateAllEntryWidgets()
log.Println("Create form1 FormFields")
arwFormFields := fnCreateFormFields(_arwEntryWidgets)
log.Println("Creating Form1")
return &widget.Form{
Items: arwFormFields,
}
}
//-------------------------------------------------------------------------------
func fnRefreshWidgetData() {
for iNdx := 0; iNdx < I_ARRAY_LEN; iNdx++ {
_arwEntryWidgets[iNdx].SetText(_arsNewData[iNdx])
}
}
submitButton := widget.NewButton("Submit", func() {
log.Println("Submit button pressed")
...
})
_wWindow.SetContent(widget.NewVBox(
wFormMain,
widget.NewGroup("",
fyne.NewContainerWithLayout(layout.NewGridLayout(2),
widget.NewButton("Exit", func() {
_wApp.Quit()
}),
submitButton,
))),
)
...
if dataChanged {
submitButton.Enable()
} else {
submitButton.Disable()
}
return []*widget.FormItem{
{ Text: "Given Names:", Widget: arwWidgets[I_NDX_GIVEN]},
...