GtkAda简单聊天错误 [英] GtkAda simple chat error

问题描述

我正在用Ada编写简单的聊天程序，并且在聊天窗口模拟方面遇到问题-单击按钮时，它会读取文本表单条目并将其放在text_view上。这是我编写的代码，这是编译输出：

I'm writing simple chat program in Ada, and I'm having problem with chat window simulation - on button clicked it reads text form entry and puts it on text_view. Here is the code I've written and here is the compile output:

gnatmake client `gtkada-config`
gcc -c -I/usr/include/gtkada client_pkg.adb
client_pkg.adb:14:19: no candidate interpretations match the actuals:
client_pkg.adb:14:37: expected private type "Gtk_Text_Iter" defined at gtk-text_iter.ads:48
client_pkg.adb:14:37: found type "Gtk_Text_View" defined at gtk-text_view.ads:58
client_pkg.adb:14:37:   ==> in call to "Get_Buffer" at gtk-text_buffer.ads:568
client_pkg.adb:14:37:   ==> in call to "Get_Buffer" at gtk-text_buffer.ads:407
client_pkg.adb:15:34: no candidate interpretations match the actuals:
client_pkg.adb:15:34: missing argument for parameter "Start" in call to "Get_Text" declared at gtk-text_buffer.ads:283
client_pkg.adb:15:34: missing argument for parameter "Start" in call to "Get_Text" declared at gtk-text_buffer.ads:270
gnatmake: "client_pkg.adb" compilation error

谁能告诉我这是什么问题，因为我不知道为什么过程 Get_Buffer 期望 Gtk_Text_Iter ，以及为什么 Get_Text 是否缺少启动参数？

Can anyone tell me what is the problem, since I have no idea why procedure Get_Buffer expects Gtk_Text_Iter, and why Get_Text miss Start parameter?

推荐答案

您必须调用正确的过程/函数。

You have to call the correct procedures/functions.

在您的示例中，您调用 Gtk.Text_Buffer.Get_Buffer ，而不是正确的 Gtk.Text_View.Get_Buffer 。这是因为您与和使用使用Gtk.Text_Buffer，但不要使用 Gtk.Text_View。 使用时应小心。

In your example, you call Gtk.Text_Buffer.Get_Buffer, not the correct Gtk.Text_View.Get_Buffer. This is because you with and use Gtk.Text_Buffer, but don't use Gtk.Text_View. You should be careful what you use. Same for Get_Text.

如果为Gtk.Text_View和Gtk.GEntry添加 use 子句，这些错误应该消失

If you add use clauses for Gtk.Text_View and Gtk.GEntry, those errors should disappear.

但是我给你一个建议：尝试使用尽可能少的 use 子句。这样，您便始终知道真正调用了什么函数。

But I give you an advice: try to use as few as possible use clauses. That way you always know what function is really called.

TLDR：使用Gtk.Text_View添加；使用Gtk.GEntry; 到 On_Btn_Send_Clicked 过程的声明部分。

TLDR: Add use Gtk.Text_View; use Gtk.GEntry; to the declaration part of the On_Btn_Send_Clicked procedure.

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