Re: Mouse leave on a row of GtkTreeView

[cecashon aol com]

With a treeview you can try measuring your rows and figure out where your cursor is in your treeview. Try the 
following out and see if it is of any help.

Eric


/*
    With Ubuntu16.04 and GTK3.18.
    gcc -Wall tree_row1.c -o tree_row1 `pkg-config --cflags --libs gtk+-3.0`
*/
#include<gtk/gtk.h>

static GtkTreeStore* get_tree_store();
static gboolean tree_motion(GtkWidget *widget, GdkEvent *event, gpointer *data);

int main(int argc, char *argv[])
  {
    gtk_init(&argc, &argv);

    GtkWidget *window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Tree View");
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_default_size(GTK_WINDOW(window), 300, 300);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkTreeStore *store=get_tree_store();

    GtkWidget *tree=gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
    gtk_tree_view_set_enable_search(GTK_TREE_VIEW(tree), TRUE);
    g_object_unref(G_OBJECT(store));

    GtkCellRenderer *renderer1=gtk_cell_renderer_text_new();
    gtk_cell_renderer_set_fixed_size(renderer1, -1, 40);
    g_object_set(renderer1, "editable", FALSE, NULL);
   
    GtkTreeViewColumn *column1=gtk_tree_view_column_new_with_attributes("Index", renderer1, "text", 0, NULL);
    GtkTreeViewColumn *column2=gtk_tree_view_column_new_with_attributes("Name", renderer1, "text", 1, NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column1);
    gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column2);  

    GtkWidget *scroll=gtk_scrolled_window_new(NULL, NULL);
    gtk_container_set_border_width(GTK_CONTAINER(scroll), 5);
    gtk_widget_set_vexpand(scroll, TRUE);
    gtk_widget_set_hexpand(scroll, TRUE);
    gtk_container_add(GTK_CONTAINER(scroll), tree);  

    gpointer ps[]={renderer1, scroll};
    g_signal_connect(tree, "motion-notify-event", G_CALLBACK(tree_motion), ps); 
    
    GtkWidget *grid=gtk_grid_new();
    gtk_container_set_border_width(GTK_CONTAINER(grid), 20);
    gtk_grid_attach(GTK_GRID(grid), scroll, 0, 0, 1, 1);
    gtk_container_add(GTK_CONTAINER(window), grid);
   
    gtk_widget_show_all(window);
    gtk_main();
    return 0;   
  }
static GtkTreeStore* get_tree_store()
  {
    gint i=0;
    GtkTreeStore *store=gtk_tree_store_new(2, G_TYPE_INT, G_TYPE_STRING);
        
    GtkTreeIter iter1;
    for(i=0;i<10;i++)
      {
        gchar *string1=g_strdup_printf("Name %i", i);
        gtk_tree_store_append(store, &iter1, NULL);
        gtk_tree_store_set(store, &iter1, 0, i, 1, string1, -1);
        g_free(string1);
      }
  
    return store;
  }
static gboolean tree_motion(GtkWidget *widget, GdkEvent *event, gpointer *data)
  {
    gint motion_y=event->button.y;
    GtkRequisition minimum_size;
    GtkRequisition natural_size;
    gtk_cell_renderer_get_preferred_size(GTK_CELL_RENDERER(data[0]), widget, &minimum_size, &natural_size);
    GtkAdjustment *adjustment=gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(data[1]));
    gdouble adj_h=gtk_adjustment_get_value(adjustment);

    g_print("Row %i\n", (motion_y+(gint)adj_h)/natural_size.height);
    
    return FALSE;
  }

 

 

-----Original Message-----
From: pspgen <pspgen mail bg>
To: cecashon <cecashon aol com>
Sent: Tue, Sep 19, 2017 11:36 am
Subject: Re: Mouse leave on a row of GtkTreeView






----- Цитат от cecashon aol com, на 19.09.2017 в 20:38 -----


 
Could you use a GtkListBox? With a list box you can add a widget to the row and connect the 
"enter-notify-event" and "leave-notify-event" signals. There is example code for a list box at

https://blog.gtk.org/2017/06/01/drag-and-drop-in-lists-revisited/

It is drag and drop but you could change up widgets and connect different signals easy enough.


Eric


Can GtkListBox have columns? With sorting, search, reorder, resize etc functionality?
My whole build is based off GtkTreeView would be very hard to switch to another widget anyway..
So I rather can't use GtkListBox.











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