package main import ( "embed" "fmt" "io/ioutil" "os" "path/filepath" "strings" "github.com/mappu/miqt/qt" ) //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.NewQWidget() ret.tab = tab layout := qt.NewQHBoxLayout2(tab) panes := qt.NewQSplitter() layout.AddWidget(panes.QWidget) ret.outline = qt.NewQListWidget2(tab) panes.AddWidget(ret.outline.QWidget) ret.outline.OnCurrentItemChanged(ret.handleJumpToBookmark) ret.textArea = qt.NewQTextEdit3(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.NewQMainWindow() ret.w.SetWindowTitle("Markdown Outliner") // Menu mnu := qt.NewQMenuBar() fileMenu := mnu.AddMenuWithTitle("&File") newtab := fileMenu.AddAction("New Tab") newtab.SetShortcut(qt.NewQKeySequence2("Ctrl+N")) newtab.SetIcon(qt.QIcon_FromTheme("document-new")) newtab.OnTriggered(func() { ret.createTabWithContents("New Document", "") }) open := fileMenu.AddAction("Open...") open.SetShortcut(qt.NewQKeySequence2("Ctrl+O")) open.SetIcon(qt.QIcon_FromTheme("document-open")) open.OnTriggered(ret.handleFileOpen) fileMenu.AddSeparator() exit := fileMenu.AddAction("Exit") exit.SetIcon(qt.QIcon_FromTheme("application-exit")) exit.OnTriggered(func() { os.Exit(0) }) helpMenu := mnu.AddMenuWithTitle("&Help") aboutQt := helpMenu.AddAction("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.NewQTabWidget2(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.NewQVariant5(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() }