forked from AuroraMiddleware/gtk
f63e6394ac
If multiple nested widgets have drag sources on them, both using bubble phase, we need to reliably pick the inner one. Both of them will try to start dragging, and we need to make sure there are no situations where the outer widget starts drag earlier and cancels the inner one. Currently, this can easily happen via integer rounding: start and current coordinates passed into gtk_drag_check_threshold() are initially doubles (other than in GtkNotebook and GtkIconView), and are casted to ints. Then those rounded values are used to calculate deltas to compare to the drag threshold, losing quite a lot of precision along the way, and often resulting in the outer widget getting larger deltas. To avoid it, just don't round it. Introduce a variant of the function that operates on doubles: gtk_drag_check_threshold_double() and use it instead of the original everywhere.
196 lines
5.9 KiB
C
196 lines
5.9 KiB
C
/* gtkiconview.h
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* Copyright (C) 2002, 2004 Anders Carlsson <andersca@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "gtk/gtkiconview.h"
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#include "gtk/gtkcssnodeprivate.h"
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#include "gtk/gtkeventcontrollermotion.h"
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#include "gtk/gtkdragsource.h"
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#include "gtk/gtkdroptargetasync.h"
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#include "gtk/gtkgestureclick.h"
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#ifndef __GTK_ICON_VIEW_PRIVATE_H__
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#define __GTK_ICON_VIEW_PRIVATE_H__
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typedef struct _GtkIconViewItem GtkIconViewItem;
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struct _GtkIconViewItem
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{
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GdkRectangle cell_area;
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int index;
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int row, col;
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guint selected : 1;
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guint selected_before_rubberbanding : 1;
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};
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typedef struct _GtkIconViewClass GtkIconViewClass;
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typedef struct _GtkIconViewPrivate GtkIconViewPrivate;
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struct _GtkIconView
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{
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GtkWidget parent;
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GtkIconViewPrivate *priv;
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};
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struct _GtkIconViewClass
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{
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GtkWidgetClass parent_class;
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void (* item_activated) (GtkIconView *icon_view,
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GtkTreePath *path);
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void (* selection_changed) (GtkIconView *icon_view);
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void (* select_all) (GtkIconView *icon_view);
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void (* unselect_all) (GtkIconView *icon_view);
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void (* select_cursor_item) (GtkIconView *icon_view);
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void (* toggle_cursor_item) (GtkIconView *icon_view);
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gboolean (* move_cursor) (GtkIconView *icon_view,
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GtkMovementStep step,
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int count,
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gboolean extend,
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gboolean modify);
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gboolean (* activate_cursor_item) (GtkIconView *icon_view);
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};
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struct _GtkIconViewPrivate
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{
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GtkCellArea *cell_area;
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GtkCellAreaContext *cell_area_context;
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gulong add_editable_id;
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gulong remove_editable_id;
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gulong context_changed_id;
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GPtrArray *row_contexts;
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int width, height;
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double mouse_x;
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double mouse_y;
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GtkSelectionMode selection_mode;
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GList *children;
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GtkTreeModel *model;
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GList *items;
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GtkEventController *key_controller;
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GtkAdjustment *hadjustment;
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GtkAdjustment *vadjustment;
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int rubberband_x1, rubberband_y1;
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int rubberband_x2, rubberband_y2;
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GdkDevice *rubberband_device;
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GtkCssNode *rubberband_node;
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guint scroll_timeout_id;
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int scroll_value_diff;
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int event_last_x, event_last_y;
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GtkIconViewItem *anchor_item;
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GtkIconViewItem *cursor_item;
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GtkIconViewItem *last_single_clicked;
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GtkIconViewItem *last_prelight;
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GtkOrientation item_orientation;
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int columns;
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int item_width;
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int spacing;
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int row_spacing;
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int column_spacing;
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int margin;
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int item_padding;
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int text_column;
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int markup_column;
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int pixbuf_column;
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int tooltip_column;
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GtkCellRenderer *pixbuf_cell;
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GtkCellRenderer *text_cell;
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/* Drag-and-drop. */
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GdkModifierType start_button_mask;
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int pressed_button;
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double press_start_x;
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double press_start_y;
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GdkContentFormats *source_formats;
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GtkDropTargetAsync *dest;
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GtkCssNode *dndnode;
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GdkDrag *drag;
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GdkDragAction source_actions;
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GdkDragAction dest_actions;
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GtkTreeRowReference *source_item;
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GtkTreeRowReference *dest_item;
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GtkIconViewDropPosition dest_pos;
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/* scroll to */
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GtkTreeRowReference *scroll_to_path;
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float scroll_to_row_align;
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float scroll_to_col_align;
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guint scroll_to_use_align : 1;
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guint source_set : 1;
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guint dest_set : 1;
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guint reorderable : 1;
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guint empty_view_drop :1;
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guint activate_on_single_click : 1;
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guint modify_selection_pressed : 1;
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guint extend_selection_pressed : 1;
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guint draw_focus : 1;
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/* GtkScrollablePolicy needs to be checked when
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* driving the scrollable adjustment values */
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guint hscroll_policy : 1;
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guint vscroll_policy : 1;
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guint doing_rubberband : 1;
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};
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void _gtk_icon_view_set_cell_data (GtkIconView *icon_view,
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GtkIconViewItem *item);
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void _gtk_icon_view_set_cursor_item (GtkIconView *icon_view,
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GtkIconViewItem *item,
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GtkCellRenderer *cursor_cell);
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GtkIconViewItem * _gtk_icon_view_get_item_at_coords (GtkIconView *icon_view,
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int x,
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int y,
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gboolean only_in_cell,
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GtkCellRenderer **cell_at_pos);
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void _gtk_icon_view_select_item (GtkIconView *icon_view,
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GtkIconViewItem *item);
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void _gtk_icon_view_unselect_item (GtkIconView *icon_view,
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GtkIconViewItem *item);
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G_END_DECLS
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#endif /* __GTK_ICON_VIEW_PRIVATE_H__ */
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