From fc15e7376f4e24b60f812f1ef31f058253e32d9c Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Tue, 26 Oct 2021 16:59:22 +0100
Subject: rescribe: Separate gui code, and organise it better (should be no
 functional change)

---
 cmd/rescribe/gui.go | 140 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 cmd/rescribe/gui.go

(limited to 'cmd/rescribe/gui.go')

diff --git a/cmd/rescribe/gui.go b/cmd/rescribe/gui.go
new file mode 100644
index 0000000..4944e42
--- /dev/null
+++ b/cmd/rescribe/gui.go
@@ -0,0 +1,140 @@
+// Copyright 2021 Nick White.
+// Use of this source code is governed by the GPLv3
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/app"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/layout"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+)
+
+// copyStdoutToChan creates a pipe to copy anything written
+// to stdout instead to a rune channel
+func copyStdoutToChan() (chan rune, error) {
+	c := make(chan rune)
+
+	origStdout := os.Stdout
+	r, w, err := os.Pipe()
+	if err != nil {
+		return c, fmt.Errorf("Error creating pipe for stdout redirection: %v", err)
+	}
+	os.Stdout = w
+
+	bufReader := bufio.NewReader(r)
+
+	go func() {
+		defer func() {
+			close(c)
+			w.Close()
+			os.Stdout = origStdout
+		}()
+		for {
+			r, _, err := bufReader.ReadRune()
+			if err != nil && err != io.EOF {
+				return
+			}
+			c <- r
+			if err == io.EOF {
+				return
+			}
+		}
+	}()
+
+	return c, nil
+}
+
+// startGui starts the gui process
+func startGui(log log.Logger, cmd string, training string, systess bool, tessdir string) error {
+	myApp := app.New()
+	myWindow := myApp.NewWindow("Rescribe OCR")
+
+	var gobtn *widget.Button
+
+	dir := widget.NewEntry()
+	dir.SetPlaceHolder("Folder to process")
+	dir.OnChanged = func(s string) {
+		// TODO: also check if string is a directory, and only enable if so
+		if dir.Text != "" {
+			gobtn.Enable()
+		} else {
+			gobtn.Disable()
+		}
+	}
+
+	openbtn := widget.NewButtonWithIcon("Choose folder", theme.FolderOpenIcon(), func() {
+		dialog.ShowFolderOpen(func(uri fyne.ListableURI, err error) {
+			if err == nil && uri != nil {
+				dir.SetText(uri.Path())
+			}
+	}, myWindow)})
+
+	progressBar := widget.NewProgressBar()
+
+	logarea := widget.NewMultiLineEntry()
+	logarea.Disable()
+
+
+	// TODO: have the button be pressed if enter is pressed
+	gobtn = widget.NewButtonWithIcon("Process OCR", theme.UploadIcon(), func() {
+		if dir.Text == "" {
+			return
+		}
+
+		gobtn.Disable()
+		gobtn.SetText("Processing...")
+
+		progressBar.SetValue(0.5)
+
+		stdout, err := copyStdoutToChan()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error copying stdout to chan: %v\n", err)
+			return
+		}
+
+		// update log area with output from outC in a concurrent goroutine
+		go func() {
+			for r := range stdout {
+				logarea.SetText(logarea.Text + string(r))
+				logarea.CursorRow = strings.Count(logarea.Text, "\n")
+				// TODO: set text on progress bar, or a label below it, to latest line printed, rather than just using a whole multiline entry like this
+				// TODO: parse the stdout and set progressBar based on that
+			}
+		}()
+
+		err = startProcess(log, cmd, dir.Text, filepath.Base(dir.Text), training, systess, dir.Text, tessdir)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error executing process: %v\n", err)
+			return
+		}
+
+		progressBar.SetValue(1.0)
+		gobtn.SetText("Process OCR")
+		gobtn.Enable()
+	})
+	gobtn.Disable()
+
+	diropener := container.New(layout.NewGridLayout(2), dir, openbtn)
+
+	content := container.NewVBox(diropener, gobtn, progressBar, logarea)
+
+	myWindow.SetContent(content)
+
+	myWindow.Show()
+	myApp.Run()
+
+	return nil
+}
-- 
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