Fedora21切换分辨率，桌面图标不重新排列？

已经解决了。
这个问题是mate桌面的caja软件包的一个Bug。在Fedora25中仍然存在。
龙芯提供这个patch文件，原理是修改caja，响应screen的size-changed事件，强行执行clean_up()，问题解决。

并且考虑到实际使用的效果，加了一点“人性化”的特性：只有在屏幕变小时才重排图标。
在3A3000笔记本上测试：

1400切换到800：重排图标，不再被挡住。
800 再切换到1400：图标不重排，保持原来位置不变。

这个patch最早包含在Fedora21的包中caja-1.8.2-3.fc21.loongson.3.src.rpm。预计将在Fedora21的3月份版本中集成发布。

From c6bf978081af901eb6e9911b82f3ae8df9e9519b Mon Sep 17 00:00:00 2001

From: Jin Guojie <jinguojie@loongson.cn>

Date: Thu, 2 Mar 2017 11:29:48 +0800

Subject: [PATCH 1/1] 改变分辨率时重排桌面图标

MIME-Version: 1.0

Content-Type: text/plain; charset=UTF-8

Content-Transfer-Encoding: 8bit



---

 libcaja-private/caja-icon-container.c   |  9 +++++++++

 src/file-manager/fm-desktop-icon-view.c | 14 ++++++++++++++

 2 files changed, 23 insertions(+)



diff --git a/libcaja-private/caja-icon-container.c b/libcaja-private/caja-icon-container.c

index d785f3e..16d6b25 100644

--- a/libcaja-private/caja-icon-container.c

+++ b/libcaja-private/caja-icon-container.c

@@ -2184,6 +2184,7 @@ lay_down_icons_vertical_desktop (CajaIconContainer *container, GList *icons)

     int total, new_length, placed;

     CajaIcon *icon;

     int height, max_width, column_width, icon_width, icon_height;

+    int screen_height;

     int x, y, x1, x2, y1, y2;

     EelDRect icon_rect;

     GtkAllocation allocation;

@@ -2192,6 +2193,14 @@ lay_down_icons_vertical_desktop (CajaIconContainer *container, GList *icons)

     gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);

     height = CANVAS_HEIGHT(container, allocation);

 

+    /* 2017/3/2 Jin: 任务 #5159 改变分辨率时重排桌面图标，

+     * screen_height是屏幕实际已经变成的高度，

+     * 而container的height还是之前的高度，

+     * 比较两者可以判断出是屏幕“变小”了，只有这种情况才重排图标。 */

+    screen_height = gdk_screen_get_height (gtk_widget_get_screen(GTK_WIDGET(container)));

+    if (height > screen_height)

+	   height = screen_height;

+

     /* Determine which icons have and have not been placed */

     placed_icons = NULL;

     unplaced_icons = NULL;

diff --git a/src/file-manager/fm-desktop-icon-view.c b/src/file-manager/fm-desktop-icon-view.c

index 1637532..c7c2359 100644

--- a/src/file-manager/fm-desktop-icon-view.c

+++ b/src/file-manager/fm-desktop-icon-view.c

@@ -318,6 +318,15 @@ fm_desktop_icon_view_class_init (FMDesktopIconViewClass *class)

     g_type_class_add_private (class, sizeof (FMDesktopIconViewDetails));

 }

 

+/* 2017/3/2 Jin: 任务 #5159 改变分辨率时重排桌面图标，

+ * screen改变分辨率的响应事件：强行调用重排图标的函数 */

+static void

+fm_desktop_icon_view_handle_size_changed (GdkScreen *screen,

+        FMDesktopIconView *desktop_icon_view)

+{

+    FM_ICON_VIEW_CLASS (fm_desktop_icon_view_parent_class)->clean_up (desktop_icon_view);

+}

+

 static void

 fm_desktop_icon_view_handle_middle_click (CajaIconContainer *icon_container,

         GdkEventButton *event,

@@ -666,6 +675,11 @@ fm_desktop_icon_view_init (FMDesktopIconView *desktop_icon_view)

                                          CAJA_ICON_LAYOUT_T_B_R_L :

                                          CAJA_ICON_LAYOUT_T_B_L_R);

 

+    /* 2017/3/2 Jin: 任务 #5159 改变分辨率时重排桌面图标，

+     * 增加screen改变分辨率的事件 */

+    g_signal_connect_after(gtk_widget_get_screen(GTK_WIDGET(icon_container)), "size_changed",

+                          G_CALLBACK (fm_desktop_icon_view_handle_size_changed), desktop_icon_view);

+

     g_signal_connect_object (icon_container, "middle_click",

                              G_CALLBACK (fm_desktop_icon_view_handle_middle_click), desktop_icon_view, 0);

     g_signal_connect_object (desktop_icon_view, "realize",

-- 

2.9.3