scrollable mdems with proper deletion

src/compiler/parser/parser.go

@@ -19,15 +19,15 @@ type SingleAnswerQuestion struct {
 }
 
 type Choice struct {
-	answer    string
-	isCorrect bool
+	Answer    string
+	IsCorrect bool
 }
 
 type MultipleChoiceQuestion struct {
-	id       string
-	question string
-	choices  []Choice
-	section  string
+	ID       string
+	Question string
+	Choices  []Choice
+	Section  string
 }
 
 func (question SingleAnswerQuestion) ToString() string {
@@ -46,16 +46,16 @@ func (question MultipleChoiceQuestion) ToString() string {
 	acc += fmt.Sprintf(
         "%20s: section: %-10s id: %-10s %-30s",
         "<Multi choice>",
-		question.section,
-		question.id,
-		question.question,
+		question.Section,
+		question.ID,
+		question.Question,
 	)
-	for _, el := range question.choices {
+	for _, el := range question.Choices {
 		opener := '-'
-		if el.isCorrect {
+		if el.IsCorrect {
 			opener = '+'
 		}
-		acc += fmt.Sprintf("\t%c %s\n", opener, strings.Trim(el.answer, "\t\n "))
+		acc += fmt.Sprintf("\t%c %s\n", opener, strings.Trim(el.Answer, "\t\n "))
 	}
 	return acc
 }
@@ -238,20 +238,20 @@ func ParseQuestions(tokens []lexer.Token) ([]Question, error) {
 			}
 			if len(questionElements) > 1 {
 				question := MultipleChoiceQuestion{
-					id:       id,
-					question: question,
+					ID:       id,
+					Question: question,
 				}
 				choices := []Choice{}
 				for k := 0; k < len(questionElements); k++ {
 					choice := Choice{}
-					choice.answer = questionElements[k].content
-					choice.isCorrect = !questionElements[k].isDash
+					choice.Answer = questionElements[k].content
+					choice.IsCorrect = !questionElements[k].isDash
 					choices = append(choices, choice)
 				}
 				if section != "" {
-					question.section = section
+					question.Section = section
 				}
-				question.choices = choices
+				question.Choices = choices
 				questions = append(questions, question)
                 if DEBUG {
                     fmt.Printf("%s", question.ToString())

src/mdemory-app-qt/main.go

@@ -3,20 +3,22 @@ package main
 import (
 	"fmt"
 	"os"
+	"strings"
+	"time"
 
 	"github.com/jorenchik/mdemory/src/compiler/api"
+	"github.com/jorenchik/mdemory/src/compiler/parser"
 	"github.com/therecipe/qt/core"
 	"github.com/therecipe/qt/widgets"
 )
 
+var mdems             []*widgets.QWidget
+var hMdemScroll       *widgets.QVBoxLayout
+var mdemSpacer        *widgets.QSpacerItem
+var spacerInitialized bool = false
 var workingPath       string = "/home/jorenchik/Code/mdemory/memorybase"
 
-// type Mdem struct {
-//     frontText string;
-//     widget    *widgets.QWidget;
-// }
-
-func CreateMdem(frontText string, backText string) *widgets.QWidget {
+func CreateMdem(frontText string, backTexts []string) *widgets.QWidget {
     // frontText := "What is the capital of Latvia?"
 
     // DefineMdem
@@ -31,6 +33,7 @@ func CreateMdem(frontText string, backText string) *widgets.QWidget {
     wFront := widgets.NewQWidget(nil, 0)
     hFront := widgets.NewQHBoxLayout()
     wFront.SetMinimumHeight(60)
+    // wFront.SetMaximumHeight(60)
     wFront.SetLayout(hFront)
     wFront.SetProperty("first", core.NewQVariant1(true));
     wMdem.SetStyleSheet(fmt.Sprintf(`
@@ -62,12 +65,15 @@ func CreateMdem(frontText string, backText string) *widgets.QWidget {
 
     vMdem.AddWidget(wBack, 0, 0)
     // AddBackContent
+    for i := range(backTexts) {
+        backText := strings.Trim(backTexts[i], " \t\n")
         elBackText := widgets.NewQLabel2(
             fmt.Sprintf("- %s", backText),
             nil,
             0,
         )
         hBack.AddWidget(elBackText, 0, 0)
+    }
     hBack.AddStretch(1)
 
     vMdem.AddWidget(wFront, 0, 0)
@@ -92,6 +98,63 @@ func CreateMdem(frontText string, backText string) *widgets.QWidget {
 }
 
     
+func CreateMdems(questions *[]parser.Question) {
+    if spacerInitialized {
+        hMdemScroll.RemoveItem(mdemSpacer)
+    }
+    for i := range(mdems) {
+        hMdemScroll.RemoveWidget(mdems[i])
+        mdems[i].Hide()
+        mdems[i].DeleteLater()
+    }
+
+    // destroy widgets
+    mdems = nil 
+    for i := range(*questions) {
+        question := (*questions)[i]
+        switch question.(type) {
+        case parser.SingleAnswerQuestion:
+            mdems = append(
+                mdems,
+                CreateMdem(
+                    question.(parser.SingleAnswerQuestion).Question,
+                    []string{
+                        question.(parser.SingleAnswerQuestion).Answer,
+                    },
+                ),
+            )
+        case parser.MultipleChoiceQuestion:
+            var answers []string
+            choices := question.(parser.MultipleChoiceQuestion).Choices
+            for i := range(choices) {
+                answers = append(answers, choices[i].Answer)
+            }
+            mdems = append(
+                mdems,
+                CreateMdem(
+                    question.(parser.MultipleChoiceQuestion).Question,
+                    answers,
+                ),
+            )
+        }
+    }
+    for i := 0; i < len(mdems); i++ {
+        hMdemScroll.AddWidget(mdems[i], 0, 0)
+    }
+
+    if !spacerInitialized {
+        mdemSpacer = widgets.NewQSpacerItem(
+            40,
+            40,
+            widgets.QSizePolicy__Minimum,
+            widgets.QSizePolicy__Expanding,
+        )
+        spacerInitialized = true
+    }
+    hMdemScroll.AddItem(mdemSpacer)
+}
+
+
 func main() {
 	// InitApp 
 	app       := widgets.NewQApplication(len(os.Args), os.Args)
@@ -133,7 +196,8 @@ func main() {
             )
             return
         }
-        _, err = api.Compile(string(fileContents))
+        start := time.Now().UnixMicro()
+        questions, err := api.Compile(string(fileContents))
         if (err != nil) {
             widgets.QMessageBox_Critical(
                 nil,
@@ -142,8 +206,11 @@ func main() {
                 widgets.QMessageBox__Ok,
                 widgets.QMessageBox__Ok,
             )
+            return
         }
-
+        duration := float32(time.Now().UnixMicro() - start) / 1000
+        fmt.Printf("Compilation took %.3fms", duration)
+        CreateMdems(&questions)
 	})
 
 	deckLabel := widgets.NewQLabel2("Decks", nil, 0)
@@ -175,31 +242,15 @@ func main() {
 	practice.SetText("Practice")
 
 	mdemScroll    := widgets.NewQScrollArea(nil)
-	hMdemScroll := widgets.NewQVBoxLayout()
-	mdemScroll.SetLayout(hMdemScroll)
+    mdemContainer := widgets.NewQWidget(nil, 0)
+	hMdemScroll = widgets.NewQVBoxLayout()
+    mdemScroll.SetWidget(mdemContainer)
+    mdemScroll.SetWidgetResizable(true)
+	mdemContainer.SetLayout(hMdemScroll)
 
     // CreateMdems
-    var mdems []*widgets.QWidget
-    mdems = append(
-        mdems, CreateMdem("What is the capital of Latvia?", "Riga"),
-    )
-    mdems = append(
-        mdems, CreateMdem("What is the capital of Estonia?", "Tallin"),
-    )
-    mdems = append(
-        mdems, CreateMdem("What is the capital of Lithuania?", "Vilnius"),
-    )
-    mdems = append(
-        mdems, CreateMdem("What is the capital of Croatia?", "Zagreb"),
-    )
-    mdems = append(
-        mdems, CreateMdem("What is the capital of Chechia?", "Prague"),
-    )
-    for i := 0; i < len(mdems); i++ {
-        hMdemScroll.AddWidget(mdems[i], 0, 0)
     rightLayout.AddWidget(mdemScroll, 1, 0)
-    }
-    hMdemScroll.AddStretch(1)
+    // CreateMdems(nil, hMdemScroll)
 
     // Pagination 
 	pagination  := widgets.NewQWidget(nil, 0)