Merge pull request #67 from rcalixte/mdoutliner6

Add mdoutliner6

.gitignore

@@ -23,6 +23,7 @@ cmd/miqt-rcc/miqt-rcc
 examples/helloworld/helloworld
 examples/helloworld6/helloworld6
 examples/mdoutliner/mdoutliner
+examples/mdoutliner/mdoutliner6
 examples/windowsmanifest/windowsmanifest
 examples/uidesigner/uidesigner
 examples/libraries/extras-scintillaedit/extras-scintillaedit

examples/mdoutliner6/README.md

@@ -0,0 +1,8 @@
+# Markdown Outliner
+
+This is sample markdown content.
+
+## Features
+
+- You can use the outline on the left to jump to parts of the document
+- Demonstrates use of the MIQT library

examples/mdoutliner6/main.go

@@ -0,0 +1,187 @@
+package main
+
+import (
+	"embed"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	qt "github.com/mappu/miqt/qt6"
+)
+
+//go:embed README.md
+var embedContent embed.FS
+
+const (
+	lineNumberRole = int(qt.UserRole + 1)
+)
+
+type AppWindow struct {
+	w  *qt.QMainWindow
+	cw *qt.QWidget
+
+	tabs *qt.QTabWidget
+}
+
+type AppTab struct {
+	tab      *qt.QWidget
+	outline  *qt.QListWidget
+	textArea *qt.QTextEdit
+}
+
+func NewAppTab() *AppTab {
+	var ret AppTab
+
+	tab := qt.NewQWidget2()
+	ret.tab = tab
+
+	layout := qt.NewQHBoxLayout(tab)
+
+	panes := qt.NewQSplitter2()
+	layout.AddWidget(panes.QWidget)
+
+	ret.outline = qt.NewQListWidget(tab)
+	panes.AddWidget(ret.outline.QWidget)
+	ret.outline.OnCurrentItemChanged(ret.handleJumpToBookmark)
+
+	ret.textArea = qt.NewQTextEdit(tab)
+	ret.textArea.OnTextChanged(ret.handleTextChanged)
+
+	panes.AddWidget(ret.textArea.QWidget)
+
+	panes.SetSizes([]int{250, 550})
+
+	return &ret
+}
+
+func NewAppWindow() *AppWindow {
+	ret := AppWindow{}
+
+	ret.w = qt.NewQMainWindow2()
+	ret.w.SetWindowTitle("Markdown Outliner")
+
+	// Menu
+
+	mnu := qt.NewQMenuBar2()
+	fileMenu := mnu.AddMenuWithTitle("&File")
+
+	newtab := fileMenu.QWidget.AddActionWithText("New Tab")
+	newtab.SetShortcut(qt.NewQKeySequence2("Ctrl+N"))
+	newtab.SetIcon(qt.QIcon_FromTheme("document-new"))
+	newtab.OnTriggered(func() {
+		ret.createTabWithContents("New Document", "")
+	})
+
+	open := fileMenu.QWidget.AddActionWithText("Open...")
+	open.SetShortcut(qt.NewQKeySequence2("Ctrl+O"))
+	open.SetIcon(qt.QIcon_FromTheme("document-open"))
+	open.OnTriggered(ret.handleFileOpen)
+
+	fileMenu.AddSeparator()
+	exit := fileMenu.QWidget.AddActionWithText("Exit")
+	exit.SetShortcut(qt.NewQKeySequence2("Ctrl+Q"))
+	exit.SetIcon(qt.QIcon_FromTheme("application-exit"))
+	exit.OnTriggered(func() {
+		os.Exit(0)
+	})
+
+	helpMenu := mnu.AddMenuWithTitle("&Help")
+	aboutQt := helpMenu.QWidget.AddActionWithText("About Qt")
+	aboutQt.SetIcon(qt.QIcon_FromTheme("help-about"))
+	aboutQt.SetShortcut(qt.NewQKeySequence2("F1"))
+	aboutQt.OnTriggered(func() {
+		qt.QApplication_AboutQt()
+	})
+	ret.w.SetMenuBar(mnu)
+
+	// Main widgets
+
+	ret.tabs = qt.NewQTabWidget(ret.w.QWidget)
+	ret.tabs.SetTabsClosable(true)
+	ret.tabs.OnTabCloseRequested(func(index int) {
+		ret.handleTabClose(index)
+	})
+
+	ret.w.SetCentralWidget(ret.tabs.QWidget)
+
+	// Add initial tab
+
+	sampleContent, err := embedContent.ReadFile("README.md")
+	if err != nil {
+		panic(err)
+	}
+	ret.createTabWithContents("README.md", string(sampleContent))
+
+	return &ret
+}
+
+func (a *AppWindow) handleTabClose(tabIndex int) {
+	a.tabs.RemoveTab(tabIndex)
+}
+
+func (a *AppWindow) handleFileOpen() {
+	fname := qt.QFileDialog_GetOpenFileName4(a.w.QWidget, "Open markdown file...", "", "Markdown files (*.md *.txt);;All Files (*)")
+	if fname == "" {
+		return
+	}
+
+	contents, err := ioutil.ReadFile(fname)
+	if err != nil {
+		qt.QMessageBox_Warning(a.w.QWidget, "Failed to open file", fmt.Sprintf("Opening file %q: %v", fname, err))
+		return
+	}
+
+	a.createTabWithContents(filepath.Base(fname), string(contents))
+}
+
+func (a *AppWindow) createTabWithContents(tabTitle, tabContent string) {
+	tab := NewAppTab()
+	tab.textArea.SetText(tabContent)
+
+	tabIdx := a.tabs.AddTab2(tab.tab, qt.QIcon_FromTheme("text-markdown"), tabTitle)
+	a.tabs.SetCurrentIndex(tabIdx)
+}
+
+func (t *AppTab) handleTextChanged() {
+	content := t.textArea.ToPlainText()
+	t.updateOutlineForContent(content)
+}
+
+func (t *AppTab) updateOutlineForContent(content string) {
+	t.outline.Clear()
+
+	lines := strings.Split(content, "\n")
+
+	for lineNumber, line := range lines {
+		if strings.HasPrefix(line, `#`) {
+			bookmark := qt.NewQListWidgetItem7(line, t.outline)
+			bookmark.SetToolTip(fmt.Sprintf("Line %d", lineNumber+1))
+			bookmark.SetData(lineNumberRole, qt.NewQVariant4(lineNumber))
+		}
+	}
+}
+
+func (t *AppTab) handleJumpToBookmark(current *qt.QListWidgetItem, previous *qt.QListWidgetItem) {
+	itm := t.outline.CurrentItem()
+	if itm == nil {
+		return
+	}
+
+	lineNumber := itm.Data(lineNumberRole).ToInt()
+
+	targetBlock := t.textArea.Document().FindBlockByLineNumber(lineNumber)
+	t.textArea.SetTextCursor(qt.NewQTextCursor4(targetBlock))
+
+	t.textArea.SetFocus()
+}
+
+func main() {
+	qt.NewQApplication(os.Args)
+
+	app := NewAppWindow()
+	app.w.Show()
+
+	qt.QApplication_Exec()
+}