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To
GTK Team, I am new into GTK programmer language and I´ve been
develop one application that needs treeview to operate a SQL data base to linux
and windows. I developed one interface with glade_3 to use gtk
2.12 for windows and mingw c compiler with a treeview that will control
database. Inside treeview I need to use some GDKEVENTS that they are: Button press, button release, button release (double
click), Button release (right click) to call popup menu, and drag and drop
operation to organize the structure. I´ve been worded hard this 2 last weeks to understand
why drag and drop doesn´t work when I define button_press_event or
button_release_event. I made some tests and I see when I don´t define any
button press or release event drag and drop work fine but when I define them,
drag and drop doesn´t work. I read some tutorials that I looked for into internet
and the documentation of GTK, GDK, GLIB and see something about drag and drop
that explain drag starts with button_press and drop ends with button releases
but my doubt go on yet. Main question is: Is it possible to use button_press ou release events
with drag and drop with high level api? If not, do I need to detect this events separately?
And manually (low level api) starts drag and drop with combination between
button_press_event and motion_event? I will appreciate yours help. Ubirajara Marques da Cruz
Email: biracruz cemig com br To make glade interface i used a window with
a treeview only. Program is below #include <gtk/gtk.h> #include <gdk/gdk.h> #include <glib.h> #include <glade/glade.h> #include <stdio.h> GladeXML
*xml; GtkWidget
*varwid; GtkCellRenderer
*renderer; GtkTreeModel
*model; GtkTreeStore
*store; GtkTreeIter
iter, child, iaux; GtkTreeViewColumn
*coluna; GtkTreePath
*path; gint i; enum { COL_NAME = 0, COL_AGE, COL_TESTE, NUM_COLS, COLOR_COLUMN }; void sair(void) { gtk_main_quit(); } static void messbox(gchar *mensagem) { GtkWidget *dialogo; if (mensagem=="") mensagem="VAZIO"; varwid==glade_xml_get_widget(xml,"window"); dialogo = gtk_message_dialog_new
(GTK_WINDOW (varwid),
GTK_DIALOG_MODAL /*|
GTK_DIALOG_DESTROY_WITH_PARENT*/,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
mensagem); gtk_dialog_run (GTK_DIALOG
(dialogo)); gtk_widget_destroy
(dialogo); }; void tv1_release(GtkWidget *tv,
GdkEventButton *evento, gpointer
usdata) { if (gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(tv),evento->x,evento->y,&path,NULL,NULL,NULL)) gtk_tree_view_set_cursor(GTK_TREE_VIEW(tv),path,coluna,0); else messbox("path
doesn't exist"); if(evento->button==3
&& evento->type==GDK_BUTTON_RELEASE) { g_print("Left
Click!\n"); } if
(evento->button==1 && evento->type==GDK_BUTTON_RELEASE) { g_print("Right
Click!\n"); } }; int main
(int argc, char
**argv) { gtk_init(&argc,&argv); glade_init(); xml = glade_xml_new("treeview.glade","window",NULL); varwid=glade_xml_get_widget(xml,"view"); renderer =
gtk_cell_renderer_text_new(); varwid=glade_xml_get_widget(xml,"view"); coluna = gtk_tree_view_column_new_with_attributes("Linha",renderer,"text",COL_NAME,"editable", TRUE,"editable-set",TRUE,
NULL); gtk_tree_view_append_column(GTK_TREE_VIEW(varwid),coluna); coluna = gtk_tree_view_column_new_with_attributes("Idade",renderer,"text",COL_AGE,
NULL); gtk_tree_view_append_column(GTK_TREE_VIEW(varwid),coluna); coluna = gtk_tree_view_column_new_with_attributes("Teste",renderer,"text",COL_TESTE,NULL); gtk_tree_view_append_column(GTK_TREE_VIEW(varwid),coluna); gtk_tree_view_set_grid_lines
(GTK_TREE_VIEW (varwid), GTK_TREE_VIEW_GRID_LINES_BOTH); store = gtk_tree_store_new (NUM_COLS
,G_TYPE_STRING,G_TYPE_ULONG,G_TYPE_STRING);
model=GTK_TREE_MODEL(store); gtk_tree_view_set_model(GTK_TREE_VIEW(varwid),
model); gchar
*a,buf[5],*pth; a="1"; gdouble
c[15]; /* * To fill
tree view i assembly an array that show parents and child to understant * tree.
if you see 0 is first level 1 is second level and so on. */ c[0]=0
;c[1]=1 ;c[2]=2 ;c[3]=3 ;c[4]=3 ;c[5]=2 ;c[6]=2 ;c[7]=3 ;c[8]=3 ;c[9]=4 ; c[10]=0
;c[11]=1 ;c[12]=0 ;c[13]=0 ;c[14]=1 ;c[15]=0 ; gtk_tree_store_append(store,&iter,NULL); a=g_ascii_dtostr(buf,2,c[0]); pth=gtk_tree_model_get_string_from_iter(model,&iter); gtk_tree_store_set(store,&iter,COL_NAME,a,COL_AGE,0,COL_TESTE,pth,-1); iaux=iter; gint i,k; for
(i=1;i<16;i++) { if
(c[i]-c[i-1]>0) //son { gtk_tree_store_append(store,&child,&iaux); a=g_ascii_dtostr(buf,2,c[i]); pth=gtk_tree_model_get_string_from_iter(model,&child); gtk_tree_store_set(store,&child,COL_NAME,a,COL_AGE,i,COL_TESTE,pth,-1); iaux=child; } else { if
(c[i]-c[i-1]==0) //brother { if (gtk_tree_model_iter_parent(model,&iaux,&child))
//brother with father { gtk_tree_store_append(store,&child,&iaux); a=g_ascii_dtostr(buf,2,c[i]); pth=gtk_tree_model_get_string_from_iter(model,&child); gtk_tree_store_set(store,&child,COL_NAME,a,COL_AGE,i,COL_TESTE,pth,-1); iaux=child; } else { //brother
without father iaux=child; if(gtk_tree_store_iter_depth(store,&iaux)==0) { gtk_tree_store_append(store,&child,NULL); a=g_ascii_dtostr(buf,2,c[i]); pth=gtk_tree_model_get_string_from_iter(model,&child); gtk_tree_store_set(store,&child,COL_NAME,a,COL_AGE,i,COL_TESTE,pth,-1); iaux=child; } } } else {
//Level grand father k=c[i-1]-c[i]; while
(k>0) { if (gtk_tree_model_iter_parent(model,&iaux,&child)==1) { k=k-1; child=iaux; } else iaux=child; }
//end while if (gtk_tree_model_iter_parent(model,&iaux,&child)==1)
//brother with father { gtk_tree_store_append(store,&child,&iaux); a=g_ascii_dtostr(buf,2,c[i]); pth=gtk_tree_model_get_string_from_iter(model,&child); gtk_tree_store_set(store,&child,COL_NAME,a,COL_AGE,i,COL_TESTE,pth,-1); iaux=child; } else { //brother
without father iaux=child; if(gtk_tree_store_iter_depth(store,&iaux)==0) { gtk_tree_store_append(store,&child,NULL); a=g_ascii_dtostr(buf,2,c[i]); pth=gtk_tree_model_get_string_from_iter(model,&child); gtk_tree_store_set(store,&child,COL_NAME,a,COL_AGE,i,COL_TESTE,pth,-1); iaux=child; } } }
//end 2nd if }//end
1st if }//
end for g_object_unref(model); glade_xml_signal_connect(xml,"tv1_release",G_CALLBACK(tv1_release)); varwid=glade_xml_get_widget(xml,"window"); gtk_widget_show_all
(varwid); gtk_main(); return 0; }
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