Merging new panel in the trunk.

ede-panel/applets/taskbar/Taskbar.cpp

@@ -0,0 +1,230 @@
+#include "Applet.h"
+
+#include <FL/Fl.H>
+#include <FL/Fl_Button.H>
+#include <edelib/Debug.h>
+
+#include "Netwm.h"
+#include "TaskButton.h"
+#include "Taskbar.h"
+#include "Panel.h"
+
+#define DEFAULT_CHILD_W 175
+#define DEFAULT_SPACING 5
+
+static void button_cb(TaskButton *b, void *t) {
+	Taskbar *tt = (Taskbar*)t;
+
+	if(Fl::event_button() == FL_RIGHT_MOUSE)
+		b->display_menu();
+	else 
+		tt->activate_window(b);
+}
+
+static void net_event_cb(int action, Window xid, void *data) {
+	E_RETURN_IF_FAIL(data != NULL);
+
+	if(action == NETWM_CHANGED_CURRENT_WORKSPACE || action == NETWM_CHANGED_WINDOW_LIST) {
+		Taskbar *tt = (Taskbar*)data;
+		tt->create_task_buttons();
+		return;
+	}
+
+	if(action == NETWM_CHANGED_WINDOW_NAME) {
+		Taskbar *tt = (Taskbar*)data;
+		tt->update_child_title(xid);
+		return;
+	}
+
+	/* this is a message, so property is not changed and netwm_get_active_window() must be called */
+	if(action == NETWM_CHANGED_ACTIVE_WINDOW) {
+		Taskbar *tt = (Taskbar*)data;
+		tt->update_active_button();
+		return;
+	}
+}
+
+Taskbar::Taskbar() : Fl_Group(0, 0, 40, 25), curr_active(NULL), prev_active(NULL), panel(NULL) {
+	end();
+
+	panel = EDE_PANEL_GET_PANEL_OBJECT;
+
+	/* assure display is openned */
+	fl_open_display();
+
+	create_task_buttons();
+	netwm_callback_add(net_event_cb, this);
+}
+
+Taskbar::~Taskbar() {
+	netwm_callback_remove(net_event_cb);
+}
+
+void Taskbar::create_task_buttons(void) {
+	/* erase all current elements */
+	if(children())
+		clear();
+
+	/* also current/prev storage */
+	curr_active = prev_active = NULL;
+
+	/* redraw it, in case no windows exists in this workspace */
+	panel_redraw();
+
+	Window *wins;
+	int     nwins = netwm_get_mapped_windows(&wins);
+
+	if(nwins > 0) {
+		TaskButton *b;
+		int   curr_workspace = netwm_get_current_workspace();
+		char *title;
+
+		for(int i = 0; i < nwins; i++) {
+			if(!netwm_manageable_window(wins[i]))
+				continue;
+
+			/* 
+			 * show window per workspace
+			 * TODO: allow showing all windows in each workspace
+			 */
+			if(curr_workspace == netwm_get_window_workspace(wins[i])) {
+				b = new TaskButton(0, 0, DEFAULT_CHILD_W, 25);
+				b->set_window_xid(wins[i]);
+				b->update_title_from_xid();
+
+				/* 
+				 * catch name changes 
+				 * TODO: put this in Netwm.{h,cpp} 
+				 */
+				XSelectInput(fl_display, wins[i], PropertyChangeMask | StructureNotifyMask);
+
+				b->callback((Fl_Callback*)button_cb, this);
+				add(b);
+			}
+		}
+
+		XFree(wins);
+	}
+
+	layout_children();
+	update_active_button();
+}
+
+void Taskbar::resize(int X, int Y, int W, int H) {
+	Fl_Widget::resize(X, Y, W, H);
+	layout_children();
+}
+
+void Taskbar::layout_children(void) {
+	if(!children())
+		return;
+
+	Fl_Widget *o;
+	int X = x() + Fl::box_dx(box());
+	int Y = y() + Fl::box_dy(box());
+	int W = w() - Fl::box_dw(box());
+
+	int child_w = DEFAULT_CHILD_W;
+	int sz = children();
+	int all_buttons_w = 0;
+
+	/* figure out the bounds */
+	for(int i = 0; i < sz; i++)
+		all_buttons_w += child(i)->w() + DEFAULT_SPACING;
+
+	if(all_buttons_w > W) {
+		int reduce = (all_buttons_w - W) / sz;
+		child_w -= reduce; 
+	}
+
+	/* now, position each child and resize it if needed */
+	for(int i = 0; i < sz; i++) {
+		o = child(i);
+
+		o->resize(X, Y, child_w, o->h());
+		X += o->w() + DEFAULT_SPACING;
+	}
+}
+
+void Taskbar::update_active_button(int xid) {
+	if(!children())
+		return;
+
+	if(xid == -1) {
+		xid = netwm_get_active_window();
+		/* TODO: make sure panel does not get 'active', or all buttons will be FL_UP_BOX */
+	}
+
+	TaskButton *o;
+	for(int i = 0; i < children(); i++) {
+		o = (TaskButton*)child(i);
+
+		if(o->get_window_xid() == xid)
+			o->box(FL_DOWN_BOX);
+		else
+			o->box(FL_UP_BOX);
+	}
+
+	redraw();
+}
+
+void Taskbar::activate_window(TaskButton *b) {
+	E_RETURN_IF_FAIL(b != NULL);
+
+	Window xid = b->get_window_xid();
+
+	/* if clicked on activated button, it will be minimized, then next one will be activated */
+	if(b == curr_active) {
+		if(wm_get_window_state(xid) != WM_STATE_ICONIC) {
+			/* minimize if not so */
+			wm_set_window_state(xid, WM_STATE_ICONIC);
+
+			if(prev_active && 
+			   prev_active != b && 
+			   wm_get_window_state(prev_active->get_window_xid()) != WM_STATE_ICONIC) 
+			{
+				xid = prev_active->get_window_xid();
+				b   = prev_active;
+			} else {
+				return;
+			}
+		}
+	} 
+
+	/* active or restore minimized */
+	netwm_set_active_window(xid);
+	update_active_button(xid);
+
+	/* TODO: use stack for this (case when this can't handle: minimize three window, out of four on the workspace) */
+	prev_active = curr_active;
+	curr_active = b;
+}
+
+void Taskbar::update_child_title(Window xid) {
+	E_RETURN_IF_FAIL(xid >= 0);
+
+	TaskButton *o;
+	for(int i = 0; i < children(); i++) {
+		o = (TaskButton*)child(i);
+
+		if(o->get_window_xid() == xid) {
+			o->update_title_from_xid();
+			break;
+		}
+	}
+}
+
+void Taskbar::panel_redraw(void) {
+	E_RETURN_IF_FAIL(panel != NULL);
+	panel->redraw();
+}
+
+
+EDE_PANEL_APPLET_EXPORT (
+ Taskbar, 
+ EDE_PANEL_APPLET_OPTION_ALIGN_LEFT | EDE_PANEL_APPLET_OPTION_RESIZABLE_H,
+ "Taskbar",
+ "0.1",
+ "empty",
+ "Sanel Zukan"
+)