Re: DSFML linking fails
On Monday, 24 December 2018 at 10:08:25 UTC, Dmitriy wrote: Hello. I'm using https://github.com/Jebbs/DSFML library ... The problem when I build my project using these libraries. The problem in linking: Did you look at http://dsfml.com/docs/firstprogram.html ? I remember having to link also the dsfmlc-.. libraries.
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Tuesday, 12 March 2019 at 14:44:59 UTC, Ron Tarrant wrote: another post on the gtkDcoding blog. 0010 says Here’s the code file. Here’s a second code file for you. but no links. I guess it's https://github.com/rontarrant/gtkDcoding/blob/master/003_box/box_003_03_checkbutton.d and https://github.com/rontarrant/gtkDcoding/blob/master/003_box/box_003_04_togglebutton.d
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Tuesday, 12 March 2019 at 14:44:59 UTC, Ron Tarrant wrote: another post on the gtkDcoding blog. 0013 says ... with *setTooltipText()*. Maybe a formatting error? Thanks again for the Blog. FYI: I also had dropped a note in some of the previous gtkdcoding forum threads
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Friday, 22 March 2019 at 11:19:56 UTC, Ron Tarrant wrote: Hmm... I'm not sure why the links didn't show up for you. I just double-checked and they're in the .md file and version of the file has been in place for at least 10 days. Still, no harm in having them on this forum as well. Thanks for taking an interest. Not sure about .md or file version, but there are no links in the actual blog post: http://gtkdcoding.com/2019/02/15/0010-checkbutton.html and apparently also not in in this .md file: https://raw.githubusercontent.com/rontarrant/gtkDcoding/master/docs/_posts/2019-02-15-0010-checkbutton.md
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Tuesday, 12 March 2019 at 14:44:59 UTC, Ron Tarrant wrote: As a side note, in 0004 you say: We can still call the constructor, even though strictly speaking it’s private, because by using ‘new MyButton()’ the constructor isn’t being called directly, but as part of a lower-level process for instantiating the object. I'm still new to D too, but I think it works in this scenario because private in D works on the module/file level. main/TestRigWindow/MyButton are defined in the same file (module) and thus can access each others private members. If you put the button class in its own file/module and import it then you would have to make its constructor public to access it. button_002_04_oop_arg.d(22): Error: class `button_002_04_oop_arg_2.MyButton` member this is not accessible
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Tuesday, 19 March 2019 at 12:33:08 UTC, Ron Tarrant wrote:
Tuesday again. This blog post is about invisible Entry widgets
and the FontButton. Really stimulating stuff and you'll find it
at:
http://gtkdcoding.com/2019/03/19/0019-disappearing-text-entry.html
A little copy/paste glitch..
code (on blog and on github) says 'text entry box' where a
FontButton is used:
writeln("The text entry box holds: ", fontButton.getFontName());
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Friday, 22 March 2019 at 23:34:08 UTC, Ron Tarrant wrote: It's fixed now. The first one :), now there's still the other one "Here’s a second code file for you."
design question, gtkd object interdependence
I have a design question about (i guess) object interdependence
using gtkd.
There is an application class which sets its property mAppWin.
The app is passed as an argument to the window constructor.
During the window constructor a scale (trackbar) is created which
also receives and stores an app reference to later update other
elements during an onChange event. The scale can access
mApp.mSomeData to set its initial value because app has been
passed down. The call to setValue() now triggers onValueChanged()
which wants to access the mAppWin property of the app to update a
canvas. Since all this happens during the initial 'new AppWin()'
call in App, the app's mAppWin property is not set yet, so
onValueChanged() will crash.
class App : Application
{
AppWin mAppWin;
void onActivate(GioApplication gioApp)
{
mSomeData = 123;
mAppWin = new AppWin(app, [...]);
class AppWin : ApplicationWindow
{
Scale1 mScale1;
this(Application application, [...])
{
mScale1 = new Scale1(0, 100, 1, app); // (app is application
casted)
class Scale1 : VScale
{
App mApp;
this([...], App app)
{
[...]
mApp = app;
[...]
setValue(max * mApp.mSomeData);
}
void onValueChanged(Range range)
{
//if (mApp.mAppWin)
mApp.mAppWin.mCanvas.update(); // mAppWin not set
yet, 0
I have several question in mind:
- Is it a bad idea to pass an app around that contains everything
for everywhere?
- Should the app pass the data for the initial scale value
through the window constructor? Or should it set the scale value
after initialization is done?
- How would the scale update the canvas without keeping/walking
through a DOM like this. Maybe some asynchronous messaging?
While I could make it work, I wonder what the actual problem is
and what it's called like.
Re: Another Tuesday (Friday?), Another GtkDcoding Blog Post
On Sunday, 24 March 2019 at 19:20:47 UTC, Ron Tarrant wrote: Sunday Blog eXtra: Installing and Using a Linux Build Environment URL: http://gtkdcoding.com/2019/03/24/x0002-gtkd-in-a-linux-environment.html Thanks for the new posts. Link dead? It's also not listed on the blog post list. But I have read it some days before, and what I noticed is that you used the sources from ~/.dub/packages/gtk-d-... I suspect you played with dub + gtkd by that time because I think they wouldn't be there otherwise. So if you use dmd in the example you might want to better use /usr/include/dmd/gtkd3/ (after installing gtkd). I installed gtkd recently like shown here https://github.com/gtkd-developers/GtkD/wiki and here https://d-apt.sourceforge.io/ which was basically this (-85 being my dmd version): sudo wget https://netcologne.dl.sourceforge.net/project/d-apt/files/d-apt.list -O /etc/apt/sources.list.d/d-apt.list sudo apt-get update --allow-insecure-repositories && sudo apt-get -y --allow-unauthenticated install --reinstall d-apt-keyring && sudo apt-get update sudo apt install libgtkd3-85 libgtkd3-dev libgtkd3-doc and I compile like this: dmd -de -w -m64 -I/usr/include/dmd/gtkd3/ -L-lgtkd-3 -run label_008_02_markup.d Not sure if you need the -m64 on x64 linux with a dmd64, should be the default then and works without.
Re: gtkDcoding Blog Post for 2019-03-29 - Grid
On Friday, 29 March 2019 at 14:25:16 UTC, Ron Tarrant wrote: There's a new tutorial for using a GTK Grid. You can find it here: http://gtkdcoding.com/2019/03/29/0022-grids.html Thanks! The first link in the blog post to '..the last blog post' links to the 0022 article itself, not to a previous one. BTW, it compiles fine without 'import gtk.c.types', too. Main.d (and maybe others) contains a 'public import gtk.c.types;'
Re: gtkDcoding Blog Post for 2019-03-29 - Grid
On Tuesday, 2 April 2019 at 11:31:39 UTC, Ron Tarrant wrote: Today's the day for (yet) another blog post over on gtkDcoding.com and the subjects are: - the RadioButton, and - the ColorButton. You can find it here: http://gtkdcoding.com/2019/04/02/0023-radio-and-color-buttons.html Thank you! But if we want one of the others to be active on start-up, as well as syncing up the observed object, we have to call that button’s setActive(true) function. To simplify this two-step process, I broke it out into its own function, setActiveButton(). The function ignores its argument and always uses member variable button2 instead. Changing the parameter type to MyRadioButton and using 'button' instead of 'button2' in the body works, so you could pass another default in RadioBox.this(). Can somebody explain why getRgba() (apparently inherited from ColorChooser) does take an out parameter instead of returning an Gdk.RGBA?
Re: gtkDcoding Blog Post # 26 - Menu Basics
On Friday, 12 April 2019 at 09:05:11 UTC, Ron Tarrant wrote: Today starts a series on GtkD menus. Over the next four weeks, we'll cover enough ground to get you up-n-running with most menu-related topics. And it all starts right here: http://gtkdcoding.com/2019/04/12/0026-menu-basics.html Thanks, I'm still a reader! Are you planning to cover messagebox-like stuff (i.e. gtkdialog.. i guess?)
Re: gtkDcoding Blog Post # 26 - Menu Basics
On Saturday, 13 April 2019 at 00:25:21 UTC, Ron Tarrant wrote: On Friday, 12 April 2019 at 13:56:51 UTC, number wrote: Are you planning to cover messagebox-like stuff (i.e. gtkdialog.. i guess?) Yes. Right after this series on menus, I start on Dialogs. The first couple of those are already in the grist mill (HelpDialog, FileChooserDialog) giving that series five articles so far. But I'll put MessageDialog next on the list which means it'll be posted on May 31st. I'm asking because there was discussion elsewhere on the net about another programming language where a [gtk] messagebox title was too long so the text could not be read completely because the messagebox sized itself to the shorter text in the content area. They said it's an OS limitation (meaning gtk standard dialogs). It also seems dialogs are not user-resizable by default, which seems strange to me. So I thought to roll my own dialog, but didn't get to it yet. I also wonder why I often encounter gtk apps/windows that are unresizable, but still have the resize-icon cursor when hovering the bottom-right window edge, which when used moves the window instead.
Re: gtkDcoding Blog Post # 26 - Menu Basics
On Saturday, 13 April 2019 at 12:42:36 UTC, Ron Tarrant wrote: On Saturday, 13 April 2019 at 09:49:47 UTC, number wrote: On Saturday, 13 April 2019 at 00:25:21 UTC, Ron Tarrant wrote: I'm asking because ... the messagebox sized itself to the shorter text in the content area. They said it's an OS limitation (meaning gtk standard dialogs). Because the Dialog class inherits from Window, you can size it with setSizeRequest(). On Windows, at least. I'm not sure about Linux. I'm about to go out for a few hours, so perhaps you could test this. Yes, this work on Linux, too. It also seems dialogs are not user-resizable by default, which seems strange to me. So I thought to roll my own dialog, but didn't get to it yet. That's another topic I have on my list for the dialog series. Sorry, I was unclear. By rolling my own I meant to not use a predefined library function MessageRequester() that exists in that language, but instead using gtk dialog directly which would be more customizable. Anyway that would only be for learning purposes, nothing I desperately need. I also wonder why I often encounter gtk apps/windows that are unresizable, but still have the resize-icon cursor when hovering the bottom-right window edge, which when used moves the window instead. It's because there are two flags controlling resize-ability, both found in generated\gtkd\gdk\c\types.d: - a window decorations flag (GdkWMDecoration), and - another that controls whether or not the window is allowed to resize (GdkWMFunction). If the programmer turns off the resize flag, but not the decorator flag, well... there's your answer. Hope that helps, number. Ok, I understand. But then it seems still strange that the window can be moved by dragging the edge if it's only a decoration that is active. Thanks for your explanations.
Re: gtkDcoding Blog Post # 28 - Menu II - CheckMenuItem
On Friday, 19 April 2019 at 12:12:28 UTC, Ron Tarrant wrote: Even though it's Good Friday, there's still a new blog post. As the thread title says, it's about using the CheckMenuItem, two examples this time. You can find it here: http://gtkdcoding.com/2019/04/19/0028-checkmenuitems.html Have a great long weekend, everyone! Hi, thanks! The function's closing comments (first code example) need some maintenance, 'exit' also in the code on the page itself: ``` } // exit() ... } // keep() ... } // toss() ```
Re: gtkDcoding Blog Post # 29 - RadioMenuItems
On Tuesday, 23 April 2019 at 09:44:12 UTC, Ron Tarrant wrote: Now that we've got Easter out of the way, it's time for another gtkDcoding blog post: http://gtkdcoding.com/2019/04/23/0029-radiomenuitem.html Hi, thanks! little typo: RadioMeniItem
Re: gtkDcoding Blog Post # 29 - RadioMenuItems
On Tuesday, 23 April 2019 at 20:40:45 UTC, Ron Tarrant wrote: On Tuesday, 23 April 2019 at 12:21:37 UTC, number wrote: Hi, thanks! little typo: RadioMeniItem How about that? The typo was in the article, not the code. Makes for a change. :) Thanks for catching, number. Are your original php gtk tutorials still available somewhere? I found this (https://php.gtk.general.narkive.com/G1Fuuk38/php-gtk-treeview-toggle) but http://www.writingup.com/ does not respond.
Re: Retrieving Column Data from a ListStore?
On Wednesday, 24 April 2019 at 18:56:50 UTC, Ron Tarrant wrote:
For anyone else who comes along looking for the same answer,
here's what I did:
I'm trying to do it with multi-selection. It works now but I
wonder if it's right to just create a dummy TreeModelIF to call
getSelectedRows()? Same question for creating a TreeIter to call
getIter()?
```
import std.stdio;
import gtk.Main;
import gtk.MainWindow;
import gtk.TreeView;
import gtk.CellRendererText;
import gtk.TreeViewColumn;
import gtk.ListStore;
import gtk.TreeStore;
import gtk.TreeIter;
import gtk.TreeSelection;
import gtk.TreePath;
void main(string[] args)
{
Main.init(args);
MainWindow window = new MainWindow("title");
window.setSizeRequest(400, 200);
TreeView treeView = new TreeView();
CellRendererText cellRendererText;
TreeViewColumn treeViewColumn;
CellRendererText cellRendererTextA = new CellRendererText();
CellRendererText cellRendererTextB = new CellRendererText();
treeViewColumn = new TreeViewColumn();
treeViewColumn.setTitle("A and B");
treeViewColumn.packStart(cellRendererTextA, true);
treeViewColumn.packStart(cellRendererTextB, true);
treeViewColumn.addAttribute(cellRendererTextA, "text", 0);
treeViewColumn.addAttribute(cellRendererTextB, "text", 1);
treeView.appendColumn(treeViewColumn);
cellRendererText = new CellRendererText();
treeViewColumn = new TreeViewColumn("C", cellRendererText,
"text", 2);
treeView.appendColumn(treeViewColumn);
//ListStore listStore = new ListStore([GType.STRING,
GType.STRING, GType.STRING]);
TreeStore treeStore = new TreeStore([GType.STRING, GType.STRING,
GType.STRING]);
treeView.setModel(treeStore);
TreeIter treeIter;
treeIter = treeStore.createIter();
treeStore.setValue(treeIter, 0, "a");
treeStore.setValue(treeIter, 1, "b");
treeStore.setValue(treeIter, 2, "c");
treeIter = treeStore.createIter();
treeStore.setValue(treeIter, 0, "a2");
treeStore.setValue(treeIter, 1, "b2");
treeStore.setValue(treeIter, 2, "c2");
TreeSelection treeSelection = treeView.getSelection();
treeSelection.setMode(SelectionMode.MULTIPLE);
treeSelection.addOnChanged(delegate void(TreeSelection
treeSelection) {
writeln("");
if (treeSelection.getMode() == SelectionMode.MULTIPLE)
{
import gtk.TreeModelIF;
TreeModelIF tm;
//writeln(tm);
TreePath[] treePaths =
treeSelection.getSelectedRows(tm);
writeln("nb selected: ",
treeSelection.countSelectedRows());
if (treePaths.length)
{
foreach (i, treePath; treePaths)
{
writefln("path(%s) : %s", i, treePath);
TreeIter treeIter = new TreeIter();
treeStore.getIter(treeIter, treePath);
writefln("%s, %s, %s"
,
treeStore.getValueString(treeIter, 0)
,
treeStore.getValueString(treeIter, 1)
,
treeStore.getValueString(treeIter, 2)
);
}
}
else
{
writeln("nothing");
}
}
else
{
TreeIter treeIter = treeSelection.getSelected();
if (treeIter)
{
writefln("%s, %s, %s"
, treeStore.getValueString(treeIter, 0)
, treeStore.getValueString(treeIter, 1)
, treeStore.getValueString(treeIter, 2)
);
}
else
{
writeln("nothing");
}
}
});
window.add(treeView);
window.showAll();
Main.run();
}
```
Re: GTK Scale/Volume Buttons Show Muted Icon on Startup
On Thursday, 25 April 2019 at 11:36:26 UTC, Ron Tarrant wrote: When running this example of a VolumeButton, ... When using `setValue(initialValue)` after `setAdjustment()` the scale seems have the correct value. If in addition the Adjustment is created with an initial value different from the `initialValue` used with `setValue()` then the icons are also correct on startup. Though I don't know why that is. The loading issue doesn't happen here (on linux).
Re: Retrieving Column Data from a ListStore?
On Thursday, 25 April 2019 at 15:16:03 UTC, Ron Tarrant wrote: On Thursday, 25 April 2019 at 11:29:04 UTC, number wrote: I'm trying to do it with multi-selection. It works now but I wonder if it's right to just create a dummy TreeModelIF to call getSelectedRows()? Same question for creating a TreeIter to call getIter()? Whatever works, I guess. Just looking over what you've got, I don't really see anyway around creating the dummy for either one since they each have to be passed into functions. I wasn't sure if it wants the actual tree model used with the tree view, but passing my treeStore didn't work, so I used a dummy. Don't know what it's for though.
Re: gtkDcoding Blog: Post #0030 - A More Practical RadioMenuItem Example
On Friday, 26 April 2019 at 11:14:23 UTC, Ron Tarrant wrote: Once again it's Friday and a new blog post is up. And just a room at the Hotel California (any time of year) you can find it here: http://gtkdcoding.com/2019/04/26/0030-radiomenuitem-practical.html There are links to the previous blog post and github code but there is no link to the github code for this one. It's probably this one: https://github.com/rontarrant/gtkDcoding/blob/master/012_menus/menu_012_12_observed_radiomenuitems.d
srand time error uint/long
How to call srand() with time()?
```
void main()
{
import core.stdc.stdlib : rand, srand;
import core.stdc.time : time;
srand(time(null));
}
```
Error: function core.stdc.stdlib.srand(uint seed) is not callable
using argument types (long)
cannot pass argument time(null) of type long to parameter uint
seed
https://run.dlang.io/is/ner0Lx
And how to use the d libs instead? is this the way to go?
```
Random rnd = Random(Clock.currTime().second);
uniform01(rnd); //(or whatever)
```
Re: srand time error uint/long
On Monday, 29 April 2019 at 14:39:29 UTC, rikki cattermole wrote: float f = uniform01(); Its already initialized on module load. If you do want to custom seed it, you'll probably want to cast the seed to uint instead and have your own instance of the random number generator. On Monday, 29 April 2019 at 15:24:41 UTC, Paul Backus wrote: https://dlang.org/phobos/std_random.html#unpredictableSeed Thanks!
Re: Blog Post #0033 - Faking an ImageMenuItem with an AccelKey
On Tuesday, 7 May 2019 at 09:39:55 UTC, Ron Tarrant wrote: But the result is today's post: how to produce a MenuItem with an image AND and AccelKey. Here's the link: http://gtkdcoding.com/2019/05/07/0033-fake_image_menu_and_accel.html Thanks! the github link links to file .._16_.. from 0032 instead of .._17_.. some end block comments need update: class FileMenuHeader ... } // class FileMenu void reportStuff } // exit() void doSomething(MenuItem mi) } // exit()
Re: Blog Post #0032 - Menu Accelerator Keys
On Friday, 3 May 2019 at 12:12:32 UTC, Ron Tarrant wrote: An accelerating post for a rainy Friday (well, it's raining here, at least) all about menu accelerator keys. Here's the link: http://gtkdcoding.com/2019/05/03/0032-accelerator_keys.html some end block comments need update: class FileMenuHeader } // class MenuHeader class EditMenuHeader } // class MenuHeader void doSomething(MenuItem mi) } // exit() (above also on the blog page) void doSomething(MenuItem mi) } // doSomethingNew() There is also 4 times a comment '// arg: ...' that doesn't make sense in that context.
Re: Blog Post #0032 - Menu Accelerator Keys
On Tuesday, 7 May 2019 at 17:41:42 UTC, Ron Tarrant wrote: It always makes me happy when you point out the small stuff. It means I got the big stuff right. :) I do feel a bit pedantic about it too :), on the other hand wrong comments are worse than no comments. I guess you've been away a while? Or do you save up and read a bunch all at once? not away, just reading it when i feel like it, yes.
dirEntries returns relative, not absolute paths
https://dlang.org/phobos/std_file.html#dirEntries
The name of each iterated directory entry contains the
absolute path.
it seems to be absolute only if the specified path is absolute,
or always relative to the parent dir of the specified path.
import std.stdio;import std.stdio;
void main()
{
import std.file;
import std.path;
assert(!"dir".exists);
scope(exit) if ("dir".exists) rmdirRecurse("dir");
mkdirRecurse("dir/dir1/dir2/dir3");
writeln("-");
foreach (DirEntry e; dirEntries("dir", SpanMode.breadth))
{
writeln("e: " ~ e);
}
writeln("-");
foreach (DirEntry e; dirEntries("../" ~ getcwd.baseName ~
"/dir", SpanMode.breadth))
{
writeln("e: " ~ e);
}
writeln("-");
foreach (DirEntry e; dirEntries(getcwd ~ "/dir",
SpanMode.breadth))
{
writeln("e: " ~ e);
}
// -
// e: dir/dir1
// e: dir/dir1/dir2
// e: dir/dir1/dir2/dir3
// -
// e: ../dTests/dir/dir1
// e: ../dTests/dir/dir1/dir2
// e: ../dTests/dir/dir1/dir2/dir3
// -
// e: /home/user/dTests/dir/dir1
// e: /home/user/dTests/dir/dir1/dir2
// e: /home/user/dTests/dir/dir1/dir2/dir3
}
unable to fork: Cannot allocate memory / core.checkedint / gtkd
I get dmd ouput:
"unable to fork: Cannot allocate memory"
when compiling the following code:
import std.stdio;
import gio.Application : GioApplication = Application;
import gtk.Application;
import gtk.ApplicationWindow;
import gtk.Widget;
import gdk.Keysyms;
int main(string[] args)
{
Application application;
bool onKeyPress(GdkEventKey* eventKey, Widget widget)
{
writeln(GdkKeysyms.GDK_Escape);
return false;
}
void activate(GioApplication app)
{
ApplicationWindow win = new ApplicationWindow(application);
win.addOnKeyPress(&onKeyPress);
win.showAll();
}
application = new Application("org.gtkd.demo.cairo.clock",
GApplicationFlags.FLAGS_NONE);
application.addOnActivate(&activate);
return application.run(args);
}
with this commandline..
dmd -v -L-lgtkd-3 -run test2.d
..it hangs for a some seconds at..
import
core.checkedint (/usr/include/dmd/druntime/import/core/checkedint.d)
..while memory usage grows up to 100%, then continues with other
imports..
code test2
function D main
function test2.main.onKeyPress
function test2.main.activate
function std.stdio.writeln!(GdkKeysyms).writeln
function std.stdio.File.write!(GdkKeysyms, char).write
function std.format.formattedWrite!(LockingTextWriter, char,
GdkKeysyms).formattedWrite
...
then finally..
cc test2.o -o /tmp/dmd_run6k9PhI -m64 -L/usr/lib/x86_64-linux-gnu
-Xlinker --export-dynamic -Xlinker -Bstatic -lphobos2 -Xlinker
-Bdynamic -lpthread -lm -lrt -ldl
unable to fork: Cannot allocate memory
if i comment-out the line..
writeln(GdkKeysyms.GDK_Escape);
then it compiles/links/runs fine.
I actually want to close the application if escape key is pressed
with
if (eventKey.keyval == GdkKeysyms.GDK_Escape) ...
but i don't know if my imports and the event handler are correct,
and i dont know how to close the application yet.
I guess there is something wrong during the compilation process?
DMD64 D Compiler v2.078.1
gtkd import path is in /etc/dmd.conf:
...
[Environment64]
DFLAGS=-I/usr/include/dmd/phobos
-I/usr/include/dmd/druntime/import -I/usr/include/dmd/gtkd3
-L-L/usr/lib/x86_64-linux-gnu -L--export-dynamic -fPIC
...
Re: unable to fork: Cannot allocate memory / core.checkedint / gtkd
On Sunday, 11 February 2018 at 13:17:13 UTC, number wrote: unable to fork: Cannot allocate memory if i comment-out the line.. writeln(GdkKeysyms.GDK_Escape); then it compiles/links/runs fine. [...] I actually want to close the application if escape key is pressed with if (eventKey.keyval == GdkKeysyms.GDK_Escape) ... Some gtkd demo used core.stdc.stdlib.exit to quit the application. I use widget.destroy now, seems to work fine. About the compilation error with writeln(), its not a problem anymore for me right now. Don't know if this is a [known] issue or what the cause is.
Re: unable to fork: Cannot allocate memory / core.checkedint / gtkd
On Sunday, 11 February 2018 at 15:05:26 UTC, number wrote:
On Sunday, 11 February 2018 at 13:17:13 UTC, number wrote:
unable to fork: Cannot allocate memory
if i comment-out the line..
writeln(GdkKeysyms.GDK_Escape);
then it compiles/links/runs fine.
I just tried again.
compiling the following code eats up my 4GB of RAM and fails.
Please copy the enumeration
from:
https://github.com/gtkd-developers/GtkD/blob/master/generated/gtkd/gdk/Keysyms.d
into the code.
import std.stdio;
void main()
{
writeln(GdkKeysyms.GDK_Escape);
}
public enum GdkKeysyms
{
...
}
Reducing the number of enum entries step by step finally will
make the compilation succeed. Is it normal that it needs so much
memory?
Re: unable to fork: Cannot allocate memory / core.checkedint / gtkd
On Tuesday, 13 February 2018 at 12:32:58 UTC, Stefan Koch wrote:
On Tuesday, 13 February 2018 at 12:17:31 UTC, number wrote:
I just tried again.
compiling the following code eats up my 4GB of RAM and fails.
Please copy the enumeration
from:
https://github.com/gtkd-developers/GtkD/blob/master/generated/gtkd/gdk/Keysyms.d
into the code.
import std.stdio;
void main()
{
writeln(GdkKeysyms.GDK_Escape);
}
public enum GdkKeysyms
{
...
}
Reducing the number of enum entries step by step finally will
make the compilation succeed. Is it normal that it needs so
much memory?
Yes unfortunately std.conv approaches the problem of printing
enums with recursive templates , which eat a ton of memory.
Ok, thanks for the info. I guess I'll just use printf then for
larger enums.
Re: unable to fork: Cannot allocate memory / core.checkedint / gtkd
On Tuesday, 13 February 2018 at 21:46:31 UTC, Stefan Koch wrote: On Tuesday, 13 February 2018 at 14:10:44 UTC, number wrote: Ok, thanks for the info. I guess I'll just use printf then for larger enums. To get the same convince you can use. the enumToString from: https://forum.dlang.org/post/pnggoabnnkojdonyz...@forum.dlang.org and writeln the result oft that. however it'll cause an error if there are two enum memebrs with the same value. Thanks!
Re: Need example of usage DerelictPQ
On Wednesday, 24 December 2014 at 11:56:40 UTC, Suliman wrote:
Could anybody provide any simple examples of usage DerelictPQ.
I do not have experience of C, and I can't understand how to
use this driver.
I need just basics like connect, select and insert.
http://code.dlang.org/packages/derelict-pq
thanks!
A bit late, but maybe useful for others, and googling 'dlang
derelict postgres example' brings you here..
The default ubuntu (16.04) postgres version caused runtime errors
for me (DerelictPQ.load()), what worked was installation from
here:
https://www.postgresql.org/download/linux/ubuntu/
the example expects a postgres user/role 'sammy' with password
'sammypw' and a database 'sammy' with a table as shown in
comments and set up as here:
https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-16-04
if you don't specify a host at PQconnectdb() then you might get
an error
'Peer authentication failed for user "sammy"'
when you run the binary as a OS user different from 'sammy', or
you would have to run the program as the postgres user like
sudo -iu sammy /path/to/prog
dub.json
{
"name": "prog",
"targetType": "executable",
"sourceFiles": [ "prog.d" ],
"dependencies": {
"derelict-pq": "~>2.2.0"
}
}
prog.d
import core.stdc.stdlib;
import std.stdio;
import std.conv;
import derelict.pq.pq;
/*
CREATE TABLE playground (
equip_id serial PRIMARY KEY,
type varchar (50) NOT NULL,
color varchar (25) NOT NULL,
location varchar(25) check (location in ('north', 'south',
'west', 'east', 'northeast', 'southeast', 'southwest',
'northwest')),
install_date date
);
INSERT INTO playground (type, color, location, install_date)
VALUES ('slide', 'blue', 'south', '2014-04-28');
INSERT INTO playground (type, color, location, install_date)
VALUES ('swing', 'yellow', 'northwest', '2010-08-16');
*/
int main(string[] args)
{
int retval = EXIT_SUCCESS;
DerelictPQ.load();
PGconn* conn = PQconnectdb("user = 'sammy' password = 'sammypw'
dbname = 'sammy' host = '127.0.0.1'");
if (PQstatus(conn) != CONNECTION_OK)
{
writefln("ERROR (connection): %s",
to!string(PQerrorMessage(conn)));
retval = EXIT_FAILURE;
}
else
{
writeln("OK (connection)");
PGresult* result = PQexec(conn, "select * from playground");
if (PQresultStatus(result) != PGRES_TUPLES_OK)
{
writefln("ERROR (result): %s",
to!string(PQerrorMessage(conn)));
retval = EXIT_FAILURE;
}
else
{
writeln("OK (result)");
int nbFields = PQnfields(result);
writeln("nbFields: ", nbFields);
int nbRows = PQntuples(result);
writeln("nbRows: ", nbRows);
for (int f; f < nbFields; f++)
{
writef("%16s", to!string(PQfname(result, f)));
}
writeln("");
for (int r; r < nbRows; r++)
{
for (int f; f < nbFields; f++)
{
ubyte* ub =
cast(ubyte*)(PQgetvalue(result, r, f));
int len = PQgetlength(result, r, f);
char[] c = cast(char[])ub[0..len];
string s = to!string(c);
writef("%16s", s);
}
writeln("");
}
}
PQclear(result);
}
PQfinish(conn);
return retval;
}
If someone has a better way to convert the PQgetvalue() to
string, i'm interested :)
The functions are as follows:
alias da_PQgetvalue = const(ubyte)*
function(const(PGresult)*,int,int);
alias da_PQgetlength = int function(const(PGresult)*,int,int);
have a nice day
get classname in static member
Is there a way to get the classname without specifying the class
in the first place as required by classinfo and
fullyQualifiedName? extracting it from __FUNCTION__ wouldn't work
outside a function, i.e. for a classfield, and 'this' doesn't
work in static members.
It's just about simple debugging like 'writeln(, ":
message: ..")' ..and learning.
And could somebody explain to me why 'typeid(this).stringof' is
returning 'typeid(this)'?
I'm using dmd v2.078.3
```
import std.stdio;
void main() {
class C
{
static void foo()
{
writeln(__FUNCTION__); // test.main.C.foo
writeln(C.classinfo); // test.main.C
import std.traits; //
writeln(fullyQualifiedName!C); // test.main.C
}
void fuu()
{
writeln(this); // test.main.C
writeln(typeid(this)); // test.main.C
writeln(typeid(this).stringof); // typeid(this)
writeln(this.classinfo);// test.main.C
}
}
C.foo();
writeln();
C c = new C();
c.fuu;
}
```
Re: get classname in static member
On Wednesday, 28 March 2018 at 10:10:19 UTC, Simen Kjærås wrote: So to get the class name you'd generally use typeof(this).stringof. ... And could somebody explain to me why 'typeid(this).stringof' is returning 'typeid(this)'? Because that's what you're asking for. :p typeid returns the run-time (also called dynamic) type of a class instance. stringof is a compile-time construct that resolves to a compile-time constant string representation of its argument. If that argument is a type, it gives the name of the type. If it's an expression (such as 1+2, foo(), or typeid(this)), it gives a string representation of the expression. For typeid(this), that's "typeid(this)". If you want to know the dynamic type of a class reference at run-time, such as in fuu(), you'd need to write writeln(typeid(this)). -- Simen On Wednesday, 28 March 2018 at 10:12:34 UTC, bauss wrote: On Wednesday, 28 March 2018 at 09:44:35 UTC, number wrote: And could somebody explain to me why 'typeid(this).stringof' is returning 'typeid(this)'? stringof will return a string equivalent to the expression or symbol's representation, not its definition. Meaning: (212 + 221).stringof == "212 + 221" (new Foo).stringof == "new Foo" etc. Thank you for the explanations. I somehow forgot about typeof though i must have seen it a lot in 'Ali Cehreli's Book.
toString contains null for struct with function/method
the write() shows a 'null' if the struct has a function/method.
why is that?
```
import std.stdio;
void main()
{
struct S
{
int i;
}
S s;
writeln(s);// S(0)
writeln(typeid(s).sizeof); // 8
struct S2
{
int i;
this(this){}
}
S2 s2;
import std.conv: to;
writeln(s2);// S2(0, null)
writeln(typeid(s2).sizeof); // 8
}
```
Re: toString contains null for struct with function/method
On Sunday, 8 April 2018 at 15:51:05 UTC, Paul Backus wrote: On Sunday, 8 April 2018 at 15:04:49 UTC, number wrote: writeln(s2);// S2(0, null) S2 is a nested struct [1], which means it has a hidden pointer field that's used to access its enclosing scope. If you change the definition to `static struct S2`, you'll get the same output for both structs. [1] https://dlang.org/spec/struct.html#nested Aha, its the nesting. And if i access the outer scope in the function its not null anymore. Thank you!
