Gtk 当窗口最小化时,如何将滚动条自动滚动到底部
我正在从事一个项目,该项目必须在Gtk 当窗口最小化时,如何将滚动条自动滚动到底部,gtk,gtk2,Gtk,Gtk2,我正在从事一个项目,该项目必须在GTK-2.0中,我面临的问题是,如果窗口在最大化后最小化,滚动条将不再返回底部 下面是可以查看和测试的代码的一部分: #include <gtk/gtk.h> typedef struct { GtkWidget *entry; GtkWidget *textview; } Widgets; void chatMSG ( GtkButton *, Widgets * ); int main ( void ) { Gt
GTK-2.0
中,我面临的问题是,如果窗口在最大化后最小化,滚动条将不再返回底部
下面是可以查看和测试的代码的一部分:
#include <gtk/gtk.h>
typedef struct
{
GtkWidget *entry;
GtkWidget *textview;
} Widgets;
void chatMSG ( GtkButton *, Widgets * );
int main ( void )
{
GtkWidget *window, *scrolled_win, *hbox, *vbox, *button;
Widgets *widg = g_slice_new ( Widgets );
/// ***
gtk_init ( NULL, NULL );
/// ***
window = gtk_window_new ( GTK_WINDOW_TOPLEVEL );
g_signal_connect ( G_OBJECT ( window ), "delete_event", gtk_main_quit, NULL );
gtk_window_set_title ( GTK_WINDOW ( window ), "WhatsChat" );
gtk_container_set_border_width ( GTK_CONTAINER ( window ), 10 );
gtk_widget_set_size_request ( window, 250, 200 );
/// ***
widg->textview = gtk_text_view_new();
gtk_text_view_set_editable ( GTK_TEXT_VIEW ( widg->textview ), FALSE );
gtk_text_view_set_cursor_visible ( GTK_TEXT_VIEW ( widg->textview ), FALSE );
/// ***
widg->entry = gtk_entry_new();
button = gtk_button_new_with_label ( "Send" );
/// ***
g_signal_connect ( G_OBJECT ( button ), "clicked", G_CALLBACK ( chatMSG ), ( gpointer ) widg );
g_signal_connect ( G_OBJECT ( widg->entry ), "activate", G_CALLBACK ( chatMSG ), ( gpointer ) widg );
/// ***
scrolled_win = gtk_scrolled_window_new ( NULL, NULL );
gtk_widget_set_size_request ( scrolled_win, -1, 200 );
gtk_scrolled_window_set_policy ( GTK_SCROLLED_WINDOW ( scrolled_win ), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
gtk_container_add ( GTK_CONTAINER ( scrolled_win ), widg->textview );
/// ***
hbox = gtk_hbox_new ( FALSE, 5 );
gtk_box_pack_start_defaults ( GTK_BOX ( hbox ), widg->entry );
gtk_box_pack_start_defaults ( GTK_BOX ( hbox ), button );
/// ***
vbox = gtk_vbox_new ( FALSE, 5 );
gtk_box_pack_start ( GTK_BOX ( vbox ), scrolled_win, TRUE, TRUE, 0 );
gtk_box_pack_start ( GTK_BOX ( vbox ), hbox, FALSE, TRUE, 0 );
/// ***
gtk_container_add ( GTK_CONTAINER ( window ), vbox );
gtk_widget_show_all ( window );
gtk_main();
}
void chatMSG ( GtkButton *button, Widgets *widg )
{
( void ) button;
GtkTextBuffer *buffer;
GtkTextMark *mark;
GtkTextIter iter, start, end;
const gchar *text;
/// ***
buffer = gtk_text_view_get_buffer ( GTK_TEXT_VIEW ( widg->textview ) );
text = gtk_entry_get_text ( GTK_ENTRY ( widg->entry ) );
/// ***
mark = gtk_text_buffer_get_insert ( buffer );
gtk_text_buffer_get_iter_at_mark ( buffer, &iter, mark );
gtk_text_buffer_get_bounds ( buffer, &start, &end );
if ( gtk_text_buffer_get_char_count ( buffer ) && strlen( text ) > 0 )
{
gtk_text_buffer_insert ( buffer, &iter, "\n", -1 );
}
gtk_text_buffer_insert ( buffer, &iter, text, -1 );
gtk_entry_set_text ( GTK_ENTRY ( widg->entry ), "" );
/// ***
mark = gtk_text_buffer_create_mark ( buffer, NULL, &iter, FALSE );
gtk_text_view_scroll_mark_onscreen ( GTK_TEXT_VIEW ( widg->textview ), mark );
gtk_text_buffer_delete_mark ( buffer, mark );
}
但它也不起作用。经过大量搜索并尝试了不同的东西,但这些都没有帮助,我通过搜索“帮助”并设法修复了它 我决定把这个分享给两个人,因为这对以后的其他人也有帮助。 以下是一个工作示例:
#include <gtk/gtk.h>
typedef struct
{
GtkWidget *entry;
GtkWidget *textview;
} Widgets;
void chatMSG ( GtkButton *, Widgets * );
void scroll_value_changed ( GtkAdjustment *adjustment, gpointer user_data );
void scroll_bottom_gravity ( GtkWidget *scrolled_window, gpointer user_data );
int main ( void )
{
GtkWidget *window, *scrolled_win, *hbox, *vbox, *button;
Widgets *widg = g_slice_new ( Widgets );
double from_bottom = 0.0;
/// ***
gtk_init ( NULL, NULL );
/// ***
window = gtk_window_new ( GTK_WINDOW_TOPLEVEL );
g_signal_connect ( G_OBJECT ( window ), "delete_event", gtk_main_quit, NULL );
gtk_window_set_title ( GTK_WINDOW ( window ), "WhatsChat" );
gtk_container_set_border_width ( GTK_CONTAINER ( window ), 10 );
gtk_widget_set_size_request ( window, 250, 200 );
/// ***
widg->textview = gtk_text_view_new();
gtk_text_view_set_editable ( GTK_TEXT_VIEW ( widg->textview ), FALSE );
gtk_text_view_set_cursor_visible ( GTK_TEXT_VIEW ( widg->textview ), FALSE );
/// ***
widg->entry = gtk_entry_new();
button = gtk_button_new_with_label ( "Send" );
/// ***
g_signal_connect ( G_OBJECT ( button ), "clicked", G_CALLBACK ( chatMSG ), ( gpointer ) widg );
g_signal_connect ( G_OBJECT ( widg->entry ), "activate", G_CALLBACK ( chatMSG ), ( gpointer ) widg );
/// ***
scrolled_win = gtk_scrolled_window_new ( NULL, NULL );
gtk_widget_set_size_request ( scrolled_win, -1, 200 );
gtk_scrolled_window_set_policy ( GTK_SCROLLED_WINDOW ( scrolled_win ), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
GtkAdjustment *adjustment = gtk_scrolled_window_get_vadjustment ( GTK_SCROLLED_WINDOW ( scrolled_win ) );
g_signal_connect ( scrolled_win, "size-allocate", ( GCallback ) scroll_bottom_gravity, &from_bottom );
g_signal_connect ( adjustment, "value-changed", ( GCallback ) scroll_value_changed, &from_bottom );
gtk_container_add ( GTK_CONTAINER ( scrolled_win ), widg->textview );
/// ***
hbox = gtk_hbox_new ( FALSE, 5 );
gtk_box_pack_start_defaults ( GTK_BOX ( hbox ), widg->entry );
gtk_box_pack_start_defaults ( GTK_BOX ( hbox ), button );
/// ***
vbox = gtk_vbox_new ( FALSE, 5 );
gtk_box_pack_start ( GTK_BOX ( vbox ), scrolled_win, TRUE, TRUE, 0 );
gtk_box_pack_start ( GTK_BOX ( vbox ), hbox, FALSE, TRUE, 0 );
/// ***
gtk_container_add ( GTK_CONTAINER ( window ), vbox );
gtk_widget_show_all ( window );
gtk_main();
}
void chatMSG ( GtkButton *button, Widgets *widg )
{
( void ) button;
GtkTextMark *mark;
GtkTextIter iter;
/// ***
GtkTextBuffer *buffer = gtk_text_view_get_buffer ( GTK_TEXT_VIEW ( widg->textview ) );
const gchar *text = gtk_entry_get_text ( GTK_ENTRY ( widg->entry ) );
/// ***
mark = gtk_text_buffer_get_insert ( buffer );
gtk_text_buffer_get_iter_at_mark ( buffer, &iter, mark );
if ( gtk_text_buffer_get_char_count ( buffer ) && strlen ( text ) > 0 )
{
gtk_text_buffer_insert ( buffer, &iter, "\n", -1 );
}
gtk_text_buffer_insert ( buffer, &iter, text, -1 );
gtk_entry_set_text ( GTK_ENTRY ( widg->entry ), "" );
}
void scroll_bottom_gravity ( GtkWidget *scrolled_window, gpointer user_data )
{
GtkAdjustment *adjustment = gtk_scrolled_window_get_vadjustment ( GTK_SCROLLED_WINDOW ( scrolled_window ) );
double *from_bottom = user_data;
double upper = gtk_adjustment_get_upper ( adjustment );
double page_size = gtk_adjustment_get_page_size ( adjustment );
gtk_adjustment_set_value ( adjustment, upper - page_size - *from_bottom );
}
void scroll_value_changed ( GtkAdjustment *adjustment, gpointer user_data )
{
double *from_bottom = user_data;
double value = gtk_adjustment_get_value ( adjustment );
double upper = gtk_adjustment_get_upper ( adjustment );
double page_size = gtk_adjustment_get_page_size ( adjustment );
*from_bottom = upper - page_size - value;
}
#包括
类型定义结构
{
GtkWidget*条目;
GtkWidget*文本视图;
}小部件;
void chatMSG(GtkButton*,Widgets*);
无效滚动值更改(GTK调整*调整,gpointer用户数据);
无效滚动底部重力(GtkWidget*滚动窗口,gpointer用户数据);
内部主(空)
{
GtkWidget*窗口、*滚动窗口、*hbox、*vbox、*按钮;
Widgets*widg=g_slice_new(Widgets);
从底部开始加倍=0.0;
/// ***
gtk_init(NULL,NULL);
/// ***
窗口=gtk_窗口_新建(gtk_窗口_顶层);
g_信号连接(g_对象(窗口),“删除事件”,gtk_主退出,空);
gtk_窗口设置标题(gtk_窗口(窗口),“WhatsChat”);
gtk_容器_设置_边框_宽度(gtk_容器(窗口),10);
gtk_小部件_设置_大小_请求(窗口,250200);
/// ***
widg->textview=gtk_text_view_new();
gtk_文本_视图_设置_可编辑(gtk_文本_视图(widg->textview),FALSE);
gtk_文本_视图_设置_光标_可见(gtk_文本_视图(widg->textview),FALSE);
/// ***
widg->entry=gtk_entry_new();
按钮=gtk_按钮_新建_,带有_标签(“发送”);
/// ***
g_信号连接(g_对象(按钮),“单击”,g_回调(chatMSG),(gpointer)widg);
g_信号连接(g_对象(widg->entry),“激活”,g_回调(chatMSG),(gpointer)widg);
/// ***
scrolled_win=gtk_scrolled_window_new(NULL,NULL);
gtk_widget_set_size_request(滚动的_win,-1200);
gtk_滚动_窗口_设置_策略(gtk_滚动_窗口(滚动_赢)、gtk_策略_自动、gtk_策略_自动);
gtk调整*调整=gtk滚动窗口获取调整(gtk滚动窗口(滚动窗口));
g_信号_连接(滚动的_win、“大小分配”、(GCallback)滚动的_bottom_gravity和from_bottom);
g_信号_连接(调整,“值更改”,(GCallback)滚动_值_更改,&从底部开始);
gtk_container_add(gtk_container(滚动的_win),widg->textview);
/// ***
hbox=gtk_hbox_新(假,5);
gtk_-box_-pack_-start_默认值(gtk_-box(hbox),widg->entry);
gtk_盒\包装\启动\默认值(gtk_盒(hbox),按钮);
/// ***
vbox=gtk_vbox_new(假,5);
gtk_-box_-pack_-start(gtk_-box(vbox)),滚动_-win,TRUE,TRUE,0;
gtk_-box_-pack_-start(gtk_-box(vbox),hbox,FALSE,TRUE,0);
/// ***
gtk_容器添加(gtk_容器(窗口),vbox);
gtk_小部件_全部显示(窗口);
gtk_main();
}
void chatMSG(GtkButton*按钮,Widgets*widg)
{
(作废)按钮;
GtkTextMark*标记;
GtkTextIter国际热核实验堆;
/// ***
GtkTextBuffer*buffer=gtk_text_view_get_buffer(gtk_text_view(widg->textview));
const gchar*text=gtk_entry\u get_text(gtk_entry(widg->entry));
/// ***
标记=gtk_文本_缓冲区_获取_插入(缓冲区);
gtk_text_buffer_get_iter_at_mark(buffer,&iter,mark);
如果(gtk_text_buffer_get_char_count(buffer)&&strlen(text)>0)
{
gtk文本缓冲区插入(缓冲区和iter,“\n”,-1);
}
gtk_text_buffer_insert(buffer,&iter,text,-1);
gtk_条目设置文本(gtk_条目(widg->条目),“”);
}
无效滚动\底部\重力(GtkWidget*滚动\窗口,gpointer用户\数据)
{
gtk调整*调整=gtk滚动窗口获取调整(gtk滚动窗口(滚动窗口));
double*from_bottom=用户_数据;
双上=gtk_调整_获得_上(调整);
双页面大小=gtk页面调整页面大小(调整);
gtk_调整_设置_值(调整,上部-页面大小-*自底部);
}
无效滚动值更改(GTK调整*调整,gpointer用户数据)
{
double*from_bottom=用户_数据;
双值=gtk_调整_获取_值(调整);
双上=gtk_调整_获得_上(调整);
双页面大小=gtk页面调整页面大小(调整);
*from_bottom=上限-页面大小-值;
}
这个问题是否特定于linux API?它与gcc有什么关系?我建议删除这些标记。@这是一个关于使用GCC
编译的Linux
上使用的GTK
的问题。作为旁注,GTK+2不应在新项目中使用。GTK+3多年来一直是稳定的版本,一旦今年晚些时候发布GTK+4,对GTK+2的支持将完全停止(甚至是安全问题)。帮你自己一个忙,使用GTK+3,并将此信息转发给要求你使用GTK+2进行编码的人。@liberforce我已经准备好使用GTK4
,但我在GTK2
中需要它。请不要问为什么:)
#include <gtk/gtk.h>
typedef struct
{
GtkWidget *entry;
GtkWidget *textview;
} Widgets;
void chatMSG ( GtkButton *, Widgets * );
void scroll_value_changed ( GtkAdjustment *adjustment, gpointer user_data );
void scroll_bottom_gravity ( GtkWidget *scrolled_window, gpointer user_data );
int main ( void )
{
GtkWidget *window, *scrolled_win, *hbox, *vbox, *button;
Widgets *widg = g_slice_new ( Widgets );
double from_bottom = 0.0;
/// ***
gtk_init ( NULL, NULL );
/// ***
window = gtk_window_new ( GTK_WINDOW_TOPLEVEL );
g_signal_connect ( G_OBJECT ( window ), "delete_event", gtk_main_quit, NULL );
gtk_window_set_title ( GTK_WINDOW ( window ), "WhatsChat" );
gtk_container_set_border_width ( GTK_CONTAINER ( window ), 10 );
gtk_widget_set_size_request ( window, 250, 200 );
/// ***
widg->textview = gtk_text_view_new();
gtk_text_view_set_editable ( GTK_TEXT_VIEW ( widg->textview ), FALSE );
gtk_text_view_set_cursor_visible ( GTK_TEXT_VIEW ( widg->textview ), FALSE );
/// ***
widg->entry = gtk_entry_new();
button = gtk_button_new_with_label ( "Send" );
/// ***
g_signal_connect ( G_OBJECT ( button ), "clicked", G_CALLBACK ( chatMSG ), ( gpointer ) widg );
g_signal_connect ( G_OBJECT ( widg->entry ), "activate", G_CALLBACK ( chatMSG ), ( gpointer ) widg );
/// ***
scrolled_win = gtk_scrolled_window_new ( NULL, NULL );
gtk_widget_set_size_request ( scrolled_win, -1, 200 );
gtk_scrolled_window_set_policy ( GTK_SCROLLED_WINDOW ( scrolled_win ), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
GtkAdjustment *adjustment = gtk_scrolled_window_get_vadjustment ( GTK_SCROLLED_WINDOW ( scrolled_win ) );
g_signal_connect ( scrolled_win, "size-allocate", ( GCallback ) scroll_bottom_gravity, &from_bottom );
g_signal_connect ( adjustment, "value-changed", ( GCallback ) scroll_value_changed, &from_bottom );
gtk_container_add ( GTK_CONTAINER ( scrolled_win ), widg->textview );
/// ***
hbox = gtk_hbox_new ( FALSE, 5 );
gtk_box_pack_start_defaults ( GTK_BOX ( hbox ), widg->entry );
gtk_box_pack_start_defaults ( GTK_BOX ( hbox ), button );
/// ***
vbox = gtk_vbox_new ( FALSE, 5 );
gtk_box_pack_start ( GTK_BOX ( vbox ), scrolled_win, TRUE, TRUE, 0 );
gtk_box_pack_start ( GTK_BOX ( vbox ), hbox, FALSE, TRUE, 0 );
/// ***
gtk_container_add ( GTK_CONTAINER ( window ), vbox );
gtk_widget_show_all ( window );
gtk_main();
}
void chatMSG ( GtkButton *button, Widgets *widg )
{
( void ) button;
GtkTextMark *mark;
GtkTextIter iter;
/// ***
GtkTextBuffer *buffer = gtk_text_view_get_buffer ( GTK_TEXT_VIEW ( widg->textview ) );
const gchar *text = gtk_entry_get_text ( GTK_ENTRY ( widg->entry ) );
/// ***
mark = gtk_text_buffer_get_insert ( buffer );
gtk_text_buffer_get_iter_at_mark ( buffer, &iter, mark );
if ( gtk_text_buffer_get_char_count ( buffer ) && strlen ( text ) > 0 )
{
gtk_text_buffer_insert ( buffer, &iter, "\n", -1 );
}
gtk_text_buffer_insert ( buffer, &iter, text, -1 );
gtk_entry_set_text ( GTK_ENTRY ( widg->entry ), "" );
}
void scroll_bottom_gravity ( GtkWidget *scrolled_window, gpointer user_data )
{
GtkAdjustment *adjustment = gtk_scrolled_window_get_vadjustment ( GTK_SCROLLED_WINDOW ( scrolled_window ) );
double *from_bottom = user_data;
double upper = gtk_adjustment_get_upper ( adjustment );
double page_size = gtk_adjustment_get_page_size ( adjustment );
gtk_adjustment_set_value ( adjustment, upper - page_size - *from_bottom );
}
void scroll_value_changed ( GtkAdjustment *adjustment, gpointer user_data )
{
double *from_bottom = user_data;
double value = gtk_adjustment_get_value ( adjustment );
double upper = gtk_adjustment_get_upper ( adjustment );
double page_size = gtk_adjustment_get_page_size ( adjustment );
*from_bottom = upper - page_size - value;
}