DlangUI

[Mike James via Digitalmars-d-announce]

"Vadim Lopatin" <coolreader.org at gmail.com> wrote in message 
news:fylchhowgmwmqhkewavo at forum.dlang.org...
> Hello!
>
> I would like to announce my project, DlangUI library - cross-platform GUI 
> for D.
> https://github.com/buggins/dlangui
> License: Boost License 1.0
>
> Native library written in D (not a wrapper to other GUI library) - easy to 
> extend.
> As a backend, uses SDL2 on any platform, Win32 API on Windows, XCB on 
> Linux. Other backends can be added easy.
> Tested on Windows and Linux.
> Supports hardware acceleration - drawing using OpenGL when built with 
> version=USE_OPENGL.
> Unicode support.
> Internationalization support.
> Uses Win32 API fonts on Windows, and FreeType on other platforms.
> Same look and feel can be achieved on all platforms.
> Flexible look and feel - themes and styles.
> API is a bit similar to Android UI.
> Flexible layout, support of different screen DPI, scaling.
> Uses two phase layout like in Android.
> Supports drawable resources in .png and .jpeg, nine-patch pngs and state 
> drawables like in Android.
> Single threaded. Use other threads for performing slow tasks.
> Mouse oriented.
>
> Actually, it's a port (with major redesign) of my library used for 
> cross-platform version of my application CoolReader from C++.
>
>
> State of project: alpha. But, already can be used for simple 2D games and 
> simple GUI apps.
> I'm keeping in mind a goal to write D language IDE based on dlangui. :)
> Adding support of 3D graphics is planned.
>
>
> Currently implemented widgets:
>
> TextWidget - simple static text (TODO: implement multiline formatting)
> ImageWidget - static image
> Button - simple button with text label
> ImageButton - image only button
> TextImageButton - button with icon and label
> CheckBox - check button with label
> RadioButton - radio button with label
> EditLine - single line edit
> EditBox - multiline editor
> VSpacer - vertical spacer - just an empty widget with layoutHeight == 
> FILL_PARENT, to fill vertical space in layouts
> HSpacer - horizontal spacer - just an empty widget with layoutWidth == 
> FILL_PARENT, to fill horizontal space in layouts
> ScrollBar - scroll bar
> TabControl - tabs widget, allows to select one of tabs
> TabHost - container for pages controlled by TabControl
> TabWidget - combination of TabControl and TabHost
>
> Layouts - Similar to layouts in Android
>
> LinearLayout - layout children horizontally or vertically depending on 
> orientation
> VerticalLayout - just a LinearLayout with vertical orientation
> HorizontalLayout - just a LinearLayout with vertical orientation
> FrameLayout - all children occupy the same place; usually onle one of them 
> is visible
> TableLayout - children are aligned into rows and columns of table
>
> List Views - similar to lists in Android UI API.
> ListWidget - layout dynamic items horizontally or vertically (one in 
> row/column) with automatic scrollbar; can reuse widgets for similar items
> ListAdapter - interface to provide data and widgets for ListWidget
> WidgetListAdapter - simple implementation of ListAdapter interface - just 
> a list of widgets (one per list item) to show
>
>
> Sample project, example1 contains demo code for most of dlangui API.
>
> Try it using DUB:
>
>     git clone https://github.com/buggins/dlangui.git
>     cd dlangui
>     dub run dlangui:example1
>
> Fonts note: on Linux, several .TTFs are loaded from hardcoded paths 
> (suitable for Ubuntu).
> TODO: add fontconfig support to access all available system fonts.
>
> Helloworld:
>
> // main.d
> import dlangui.all;
> mixin DLANGUI_ENTRY_POINT;
>
> /// entry point for dlangui based application
> extern (C) int UIAppMain(string[] args) {
>     // resource directory search paths
>     string[] resourceDirs = [
>         appendPath(exePath, "../res/"),   // for Visual D and DUB builds
>         appendPath(exePath, "../../res/") // for Mono-D builds
>     ];
>
>     // setup resource directories - will use only existing directories
>     Platform.instance.resourceDirs = resourceDirs;
>     // select translation file - for english language
>     Platform.instance.uiLanguage = "en";
>     // load theme from file "theme_default.xml"
>     Platform.instance.uiTheme = "theme_default";
>
>     // create window
>     Window window = Platform.instance.createWindow("My Window", null);
>     // create some widget to show in window
>     window.mainWidget = (new Button()).text("Hello 
> world"d).textColor(0xFF0000); // red text
>     // show window
>     window.show();
>     // run message loop
>     return Platform.instance.enterMessageLoop();
> }
>
> DDOC generated documentation can be found there: 
> https://github.com/buggins/dlangui/tree/master/docs
> For more info see readme and example1 code.
>
> I would be glad to see any feedback.
> Can this project be useful for someone? What features/widgets are must 
> have for you?
>
>
> Best regards,
>      Vadim  <coolreader.org at gmail.com>
>

Hi Vadim,

I am evaluating GUIs for a project I have in mind and the DLangUI looks 
interesting...

First problem: you need to add gl3n to the git clone list for developing 
under Visual-D.

I am having problems running (debugging) the example1 program. When loading 
the resources it gets to tab_up_background.9.png (line 579 in file 
resources.d) and then fails with an exception:

"Unhandled exception at 0x0044f932 in example1.exe: 0xC0000005: Access 
violation reading location 0x00000000."

Do you have any clues as to what the problem could be?

Regards,
-=mike=-