csharp texteditor app: Revamping of this example
Summary: Added save and load buttons. Added information popups. Adapted to the style of the rest of the csharp examples. Reviewers: lauromoura, vitor.sousa, felipealmeida, ajwillia.ms Reviewed By: lauromoura Differential Revision: https://phab.enlightenment.org/D7173
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Xavi Artigas
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eb2cf48195
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a040529352
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/* Simple text editor with a main text box and a toolbar on top:
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+vbox----------------------------------------+
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| +hbox------------------------------------+ |
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| | +btn-+ +btn-+ +btn-+ +box-----+ +btn-+ | |
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| | |NEW | |SAVE| |LOAD| | spacer | |QUIT| | |
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| | +----+ +----+ +----+ +--------+ +----+ | |
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| +----------------------------------------+ |
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| +text------------------------------------+ |
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| | | |
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| | | |
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| | Main text box | |
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| | | |
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| | | |
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| +----------------------------------------+ |
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+--------------------------------------------+
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*/
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using System;
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public class TextEditor : IDisposable
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public class TextEditor
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{
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private efl.ui.IWin win;
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private efl.ui.IText editor;
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private efl.ui.IButton toolbarNew;
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private efl.ui.IWin win; // The main window
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private efl.ui.IText editorTextBox; // The main text entry
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private efl.ui.IButton toolbarButtonNew; // The "New" button in the toolbar
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private efl.ui.IButton toolbarButtonSave; // The "Save" button in the toolbar
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private efl.ui.IButton toolbarButtonLoad; // The "Load" button in the toolbar
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private bool edited = false;
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private bool edited = false; // Document was edited since last save
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// File to load and save is fixed since we do not use a file selection dialog
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private readonly string filename = System.IO.Path.Combine(System.IO.Path.GetTempPath(),
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"texteditor_example.txt");
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// Quits the application
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private void GUIQuitCb(object sender, EventArgs ea)
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{
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efl.ui.Config.Exit();
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}
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// Enables or disables buttons on the toolbar as required
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private void GUIToolbarRefresh()
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{
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// "New" is enabled if there is text in the text box
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toolbarButtonNew.SetDisabled(string.IsNullOrEmpty(editorTextBox.GetText()));
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// "Save" is enabled if the text has been modified since last save or load
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toolbarButtonSave.SetDisabled(!edited);
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// "Load" is enabled if there is a file to load
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toolbarButtonLoad.SetDisabled(!System.IO.File.Exists(filename));
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}
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// Called when the text in the editor has changed
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private void EditorChangedCb(object sender, EventArgs ea)
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{
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edited = true;
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GUIToolbarRefresh();
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}
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private efl.ui.IButton GUIToolbarButtonAdd(efl.ui.IBox toolbar, string name, string iconName, EventHandler func)
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// Shows a modal message popup with an "OK" button
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private void ShowMessage(string message)
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{
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efl.ui.IButton button = new efl.ui.Button(toolbar);
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button.SetText(name);
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button.ClickedEvt += func;
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toolbar.DoPack(button);
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efl.ui.IImage img = new efl.ui.Image(toolbar);
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img.SetIcon(iconName);
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efl.Content.static_cast(button.GetPart("efl.content")).SetContent(img);
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return button;
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new efl.ui.Popup_Alert_Text (win, (efl.ui.IPopup_Alert_Text epopup) => {
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epopup.SetText(message);
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epopup.SetExpandable(new eina.Size2D(200,200));
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epopup.SetButton(efl.ui.Popup_Alert_Button.Positive, "OK", null);
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epopup.ButtonClickedEvt +=
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(object sender, efl.ui.Popup_Alert.ButtonClickedEvt_Args ea) => {
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// Dismiss popup when the button is clicked
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((efl.ui.IPopup_Alert_Text)sender).SetParent(null);
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};
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});
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}
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// Adds a button to the toolbar, with the given text, icon and click event handler
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private efl.ui.IButton GUIToolbarButtonAdd(efl.ui.IBox toolbar, string name,
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string iconName, EventHandler func)
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{
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return new efl.ui.Button(toolbar, (efl.ui.IButton ebutton) => {
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ebutton.SetText(name);
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ebutton.ClickedEvt += func;
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ebutton.SetHintWeight(0, 1);
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toolbar.DoPack(ebutton);
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// Set the content of the button
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efl.Content.static_cast(ebutton.GetPart("efl.content")).SetContent(
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// Which is an image
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new efl.ui.Image(toolbar, (efl.ui.IImage eimage) => {
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eimage.SetIcon(iconName);
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})
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);
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});
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}
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// Creates a new toolbar, with all its buttons
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private void GUIToolbarSetup(efl.ui.IBox parent)
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{
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efl.ui.IBox bar = new efl.ui.Box(parent);
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bar.SetHintWeight(1, 0);
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bar.SetDirection(efl.ui.Dir.Horizontal);
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parent.DoPack(bar);
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// Create a horizontal box container for the buttons
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efl.ui.IBox bar = new efl.ui.Box(parent, (efl.ui.IBox ebox) => {
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// 0 vertical weight means that the toolbar will have the minimum height
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// to accommodate all its buttons and not a pixel more. The rest of the
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// space will be given to the other object in the parent container.
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ebox.SetHintWeight(1, 0);
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ebox.SetDirection(efl.ui.Dir.Horizontal);
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parent.DoPack(ebox);
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});
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toolbarNew = GUIToolbarButtonAdd(bar, "New", "document-new",
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(object sender, EventArgs ea) =>
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{
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editor.SetText("");
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edited = false;
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// "New" button
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toolbarButtonNew = GUIToolbarButtonAdd(bar, "New", "document-new",
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(object sender, EventArgs ea) => {
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// When this button is clicked, remove content and refresh toolbar
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editorTextBox.SetText("");
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GUIToolbarRefresh();
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});
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});
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// spacer box
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// "Save" button
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toolbarButtonSave = GUIToolbarButtonAdd(bar, "Save", "document-save",
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(object sender, EventArgs ea) => {
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// When this button is clicked, try to save content and refresh toolbar
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try {
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System.IO.File.WriteAllText(filename, editorTextBox.GetText());
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edited = false;
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GUIToolbarRefresh();
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ShowMessage("Saved!");
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} catch (Exception e) {
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// If something fails, show the error message
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ShowMessage(e.Message);
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}
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});
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// "Load" button
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toolbarButtonLoad = GUIToolbarButtonAdd(bar, "Load", "document-open",
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(object sender, EventArgs ea) => {
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// When this button is clicked, try to load content and refresh toolbar
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try {
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editorTextBox.SetText(System.IO.File.ReadAllText(filename));
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edited = false;
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GUIToolbarRefresh();
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ShowMessage("Loaded!");
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} catch (Exception e) {
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// If something fails, show the error message
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ShowMessage(e.Message);
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}
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});
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// Spacer box to use all available space not required by buttons
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// (It has a default horizontal weight of 1, whereas all buttons have
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// a horizontal weight of 0).
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// As a result, it pushes the "Quit" button to the right margin and
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// the rest to the left.
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efl.ui.IBox box = new efl.ui.Box(parent);
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box.SetHintWeight(10, 0);
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bar.DoPack(box);
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// "Quit" button
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GUIToolbarButtonAdd(bar, "Quit", "application-exit", GUIQuitCb);
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}
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// Builds the user interface for the text editor
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public TextEditor()
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{
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// Create a window and initialize it
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win = new efl.ui.Win(efl.App.GetLoopMain(), (efl.ui.IWin ewin) => {
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ewin.SetText("Text Editor");
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ewin.SetAutohide(true);
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ewin.HideEvt += GUIQuitCb;
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});
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// Create a vertical box container
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efl.ui.IBox box = new efl.ui.Box(win);
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win.SetContent(box);
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// Create the toolbar and add it to the box
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GUIToolbarSetup(box);
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// Create the main text entry
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editorTextBox = new efl.ui.Text(box, (efl.ui.IText etext) => {
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etext.SetFont("Mono", 14);
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etext.SetMultiline(true);
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etext.SetEditable(true);
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etext.SetScrollable(true);
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etext.SetHintMin(new eina.Size2D(360, 240));
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etext.ChangedEvt += EditorChangedCb;
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etext.ChangedUserEvt += EditorChangedCb;
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box.DoPack(etext);
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});
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// Initial refresh of the toolbar buttons
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GUIToolbarRefresh();
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}
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private void GUIToolbarRefresh()
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{
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toolbarNew.SetDisabled(!edited);
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}
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public TextEditor()
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{
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win = new efl.ui.Win(null, (efl.ui.IWin ewin) => {
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ewin.SetWinType(efl.ui.Win_Type.Basic);
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ewin.SetText("Text Editor");
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ewin.SetAutohide(true);
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});
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// when the user clicks "close" on a window there is a request to hide
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win.HideEvt += GUIQuitCb;
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efl.ui.IBox box = new efl.ui.Box(win);
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eina.Size2D sz;
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sz.W = 360;
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sz.H = 240;
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box.SetHintMin(sz);
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win.SetContent(box);
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GUIToolbarSetup(box);
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editor = new efl.ui.Text(box);
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editor.SetFont("Mono", 14);
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editor.SetMultiline(true);
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editor.SetEditable(true);
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editor.SetScrollable(true);
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editor.SetScrollable(true);
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editor.ChangedEvt += EditorChangedCb;
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editor.ChangedUserEvt += EditorChangedCb;
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box.DoPack(editor);
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}
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~TextEditor()
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{
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Dispose(false);
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}
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protected void Dispose(bool disposing)
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{
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editor.Dispose();
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toolbarNew.Dispose();
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win.Dispose();
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}
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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// This method won't return until the application quits
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public void Run()
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{
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// start main loop
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// Start the EFL main loop
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efl.ui.Config.Run();
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}
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}
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public class Example
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{
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#if WIN32
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[STAThreadAttribute()]
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#endif
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public static void Main()
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{
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// Initialize EFL and all UI components
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efl.All.Init(efl.Components.Ui);
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var textEditor = new TextEditor();
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textEditor.Run();
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// dispose after quit
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textEditor.Dispose();
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// Shutdown EFL
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efl.All.Shutdown();
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}
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}
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