/**
* @brief 初始化窗口管理器图形相关
*
* @param framebuffer_path framebuffer设备路径
* @param top_margin 配置项 屏幕上方留白的像素
* @param down_margin 配置项 屏幕下方留白的像素
* @param left_margin 配置项 屏幕左方留白的像素
* @param right_margin 配置项 屏幕右方留白的像素
*
* @return 成功返回0 否则返回-1
**/
static si_t graph_init(char* framebuffer_path, si_t top_margin, si_t down_margin, si_t left_margin, si_t right_margin)
{
struct graphics_device* gd_ptr = NULL;
/* 初始化屏幕 */
screen_init(framebuffer_path);
/* 设置颜色的限制 */
screen_color_limit();
/**
* 初始化窗口管理器的图形设备
**/
global_wm.gd_handler = engine_graphics_device_init(0, 0, global_screen.width, global_screen.height, 0,0,0,0,0);
if(0 == global_wm.gd_handler)
{
EGUI_PRINT_ERROR("failed to init window manager graph device.");
return -1;
}
gd_ptr = (struct graphics_device*)global_wm.gd_handler;
gd_ptr->screen.memory_addr = global_screen.memory_addr;
gd_ptr->screen.buffer_addr = NULL;
gd_ptr->screen.video_access_mode = VIDEO_ACCESS_MODE_DIRECT;
/**
* 初始化窗口区域
**/
rectangle_set(&global_wm.work_area,
0 + left_margin, 0 + top_margin, global_screen.width - left_margin - right_margin, global_screen.height - top_margin - down_margin);
/** 绘制桌面 **/
engine_set_color(global_wm.gd_handler, global_wm.backcolor.r, global_wm.backcolor.g, global_wm.backcolor.b, global_wm.backcolor.a);
engine_fill_rectangle(global_wm.gd_handler, global_wm.work_area.x, global_wm.work_area.y, global_wm.work_area.width, global_wm.work_area.height);
return 0;
}
extern si_t send_widget_resize_message(struct egui_uds* uds_ptr, union message* msg, si_t window_descripter, si_t x_axis, si_t y_axis, si_t x_size, si_t y_size)
{
union message msg_to_be_sent;
struct rectangle area = {0};
copy_message(msg, &msg_to_be_sent);
rectangle_set(&area, x_axis, y_axis, x_size, y_size);
message_set_widget_resize(&msg_to_be_sent, window_descripter, &area);
return comm_send_message(uds_ptr, &msg_to_be_sent);
}
gboolean FloatingWindow::on_title_bar_motion_notify (GdkEventMotion *event)
{
if (dragging_window) {
guint layout_width, layout_height;
gtk_layout_get_size (GTK_LAYOUT (layout), &layout_width, &layout_height);
gint event_x = event->x_root;
gint event_y = event->y_root;
if (previous_root_x >= 0) {
bool move_box = false;
if (event_x != previous_root_x) {
guint new_x = my_gdk_rectangle.x + event_x - previous_root_x;
// The window does not move beyond the left or right side
if (new_x >= 0) {
if ((new_x + my_gdk_rectangle.width) <= layout_width) {
my_gdk_rectangle.x = new_x;
move_box = true;
}
}
}
if (event_y != previous_root_y) {
guint new_y = my_gdk_rectangle.y + event_y - previous_root_y;
// The window does not move beyond the top or bottom.
if (new_y >= 0) {
if ((new_y + my_gdk_rectangle.height) <= layout_height) {
my_gdk_rectangle.y = new_y;
move_box = true;
}
}
}
if (move_box) {
rectangle_set (my_gdk_rectangle);
}
}
previous_root_x = event_x;
previous_root_y = event_y;
}
return false;
}
void window_info_resize(struct window_info* win_info_ptr, si_t x, si_t y, si_t w, si_t h)
{
/* 窗口区域 */
rectangle_set(&win_info_ptr->area,
x - frame_size, y - frame_size - title_bar_size, w + 2 * frame_size, h + 2 * frame_size + title_bar_size);
/* 用户工作区域 */
rectangle_set(&win_info_ptr->work_area, x, y, w, h);
/* 菜单按钮区域 */
rectangle_set(&win_info_ptr->menu_button_area,
x, y - title_bar_size, title_bar_size, title_bar_size);
/* 标题栏区域 */
rectangle_set(&win_info_ptr->title_bar_area,
x + title_bar_size, y - title_bar_size, w - 2 * title_bar_size, title_bar_size);
/* 最小化按钮区域 */
if(win_info_ptr->minimize_enable == 1)
{
rectangle_set(&win_info_ptr->minimize_button_area,
x + w - 3 * title_bar_size, y - title_bar_size, title_bar_size, title_bar_size);
win_info_ptr->title_bar_area.width -= title_bar_size;
}
/* 最大化按钮区域 */
if(win_info_ptr->maximize_enable == 1)
{
rectangle_set(&win_info_ptr->maximize_button_area,
x + w - 2 * title_bar_size, y - title_bar_size, title_bar_size, title_bar_size);
win_info_ptr->title_bar_area.width -= title_bar_size;
}
/* 退出按钮区域 */
rectangle_set(&win_info_ptr->close_button_area,
x + w - title_bar_size, y - title_bar_size, title_bar_size, title_bar_size);
}
void FloatingWindow::display(bool startup)
// Does the bookkeeping necessary for displaying the floating box.
// startup: whether the box is started at program startup.
{
// Settings.
extern Settings *settings;
// The parameters of all the windows.
WindowData window_parameters(false);
// Clear the new window's position.
my_gdk_rectangle.x = 0;
my_gdk_rectangle.y = 0;
my_gdk_rectangle.width = 0;
my_gdk_rectangle.height = 0;
// At program startup extract the position and size of the window from the general configuration.
// It does not matter whether the space for the window is already taken up by another window,
// because the user wishes to use the coordinates that he has set for this window.
for (unsigned int i = 0; i < window_parameters.widths.size(); i++) {
if ((window_parameters.ids[i] == window_id) && (window_parameters.titles[i] == title) && startup) {
my_gdk_rectangle.x = window_parameters.x_positions[i];
my_gdk_rectangle.y = window_parameters.y_positions[i];
my_gdk_rectangle.width = window_parameters.widths[i];
my_gdk_rectangle.height = window_parameters.heights[i];
}
}
// Reject zero width and zero height values on startup.
if ((my_gdk_rectangle.width == 0) || (my_gdk_rectangle.height == 0))
startup = false;
// When a new window needs to be allocated, there are a few steps to be taken.
if (!startup) {
// Step 1: The area rectangle where the window should fit in is defined.
GdkRectangle area_rectangle;
area_rectangle.x = 0;
area_rectangle.y = 0;
area_rectangle.width = 0;
area_rectangle.height = 0;
{
guint width, height;
gtk_layout_get_size (GTK_LAYOUT (layout), &width, &height);
area_rectangle.width = width;
area_rectangle.height = height;
}
// Step 2: An available region is made of that whole area.
GdkRegion *available_region = gdk_region_rectangle(&area_rectangle);
// Step 3: The regions of each of the open windows is substracted from the available region.
for (unsigned int i = 0; i < settings->session.open_floating_windows.size(); i++) {
FloatingWindow * floating_window = (FloatingWindow *) settings->session.open_floating_windows[i];
GdkRectangle rectangle = floating_window->rectangle_get();
GdkRegion *region = gdk_region_rectangle(&rectangle);
gdk_region_subtract(available_region, region);
gdk_region_destroy(region);
}
// Step 4: The rectangles that the area region consists of are requested,
// and the biggest suitable rectangle is chosen for the window.
// A rectangle is considered suitable if it has at least 10% of the width, and 10% of the height of the area rectangle.
GdkRectangle *gdk_rectangles = NULL;
gint rectangle_count = 0;
gdk_region_get_rectangles(available_region, &gdk_rectangles, &rectangle_count);
for (int i = 0; i < rectangle_count; ++i) {
GdkRectangle & rectangle = gdk_rectangles[i];
if (rectangle.width >= (area_rectangle.width / 10)) {
if (rectangle.height >= (area_rectangle.height / 10)) {
if ((rectangle.width * rectangle.height) > (my_gdk_rectangle.width * my_gdk_rectangle.height)) {
my_gdk_rectangle = rectangle;
}
}
}
}
g_free(gdk_rectangles);
// Step 5: The available region is destroyed.
gdk_region_destroy(available_region);
// Step 6: If no area big enough is found, then the window that takes most space in the area is chosen,
// the longest side is halved, and the new window is put in that freed area.
if ((my_gdk_rectangle.width == 0) || (my_gdk_rectangle.height == 0)) {
FloatingWindow * resize_window_pointer = NULL;
int largest_size = 0;
for (unsigned int i = 0; i < settings->session.open_floating_windows.size(); i++) {
FloatingWindow *floating_window = (FloatingWindow *) settings->session.open_floating_windows[i];
GdkRectangle rectangle = floating_window->rectangle_get ();
int size = rectangle.width * rectangle.height;
if (size > largest_size) {
resize_window_pointer = floating_window;
largest_size = size;
}
}
if (resize_window_pointer) {
GdkRectangle resize_window_rectangle = resize_window_pointer->rectangle_get();
my_gdk_rectangle = resize_window_pointer->rectangle_get();
if (resize_window_rectangle.width > resize_window_rectangle.height) {
resize_window_rectangle.width /= 2;
my_gdk_rectangle.width /= 2;
my_gdk_rectangle.x += resize_window_rectangle.width;
} else {
resize_window_rectangle.height /= 2;
my_gdk_rectangle.height /= 2;
my_gdk_rectangle.y += resize_window_rectangle.height;
}
resize_window_pointer->rectangle_set (resize_window_rectangle);
}
}
}
// Add the window to the layout and set its position and size.
gtk_layout_put (GTK_LAYOUT (layout), vbox_window, my_gdk_rectangle.x, my_gdk_rectangle.y);
rectangle_set (my_gdk_rectangle);
// Store a pointer to this window in the Session.
settings->session.open_floating_windows.push_back(gpointer (this));
}