purebasic.info

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TransparentImage$ = "/home/denis/kontact.png"
 
 
Procedure.s find_library(libname.s); find a library with the given name - returns lib + full path
prefix.s="/lib/"
mypgm1= RunProgram("ls", "/lib","",#PB_Program_Open|#PB_Program_Read)
mypgm= RunProgram("grep", "-i "+libname.s,"",#PB_Program_Open|#PB_Program_Connect|#PB_Program_Read,mypgm1)
While ProgramRunning(mypgm)
      output$ + ReadProgramString(mypgm) +"|"
Wend
library$=""
Trim(output$)
output$=ReplaceString(output$,"||","|",1,1)
If output$="|" ;nothing found
    prefix.s="/usr/lib/"
    mypgm1= RunProgram("ls", "/usr/lib","",#PB_Program_Open|#PB_Program_Read)
    mypgm= RunProgram("grep", "-i "+libname.s,"",#PB_Program_Open|#PB_Program_Connect|#PB_Program_Read,mypgm1)
    While ProgramRunning(mypgm)
          output$ + ReadProgramString(mypgm) +"|"
    Wend
EndIf
Trim(output$)
output$=ReplaceString(output$,"||","|",1,1)
If output$="|" :ProcedureReturn "":EndIf
a=CountString(output$,"|")
For m= 1 To a
    tmp$= StringField(output$,m,"|")
;     tmp$=StringField(tmp$,2,">")
    If GetExtensionPart(tmp$)="so" Or FindString(tmp$,".so.",1)
        tmp$=Trim(tmp$)       
        library$= tmp$
    EndIf   
Next
KillProgram(mypgm1)
KillProgram(mypgm)
CloseProgram(mypgm1)
CloseProgram(mypgm)
 
ProcedureReturn prefix.s+library$
EndProcedure
;
Global support_alpha_channel=#False
 
Global gtk_label_set_single_line_mode
Global gtk_window_set_icon_name
Global gtk_window_set_has_frame
Global gdk_screen_get_rgba_colormap
Global gdk_cairo_create
Global gdk_window_set_back_pixmap
Global cairo_set_source_rgba
Global cairo_set_source_rgb
Global cairo_set_operator
Global cairo_paint
Global cairo_stroke
Global cairo_destroy
 
Enumeration
  #CAIRO_OPERATOR_CLEAR
  #CAIRO_OPERATOR_SOURCE
  #CAIRO_OPERATOR_OVER
  #CAIRO_OPERATOR_IN
  #CAIRO_OPERATOR_OUT
  #CAIRO_OPERATOR_ATOP
  #CAIRO_OPERATOR_DEST
  #CAIRO_OPERATOR_DEST_OVER
  #CAIRO_OPERATOR_DEST_IN
  #CAIRO_OPERATOR_DEST_OUT
  #CAIRO_OPERATOR_DEST_ATOP
  #CAIRO_OPERATOR_XOR
  #CAIRO_OPERATOR_ADD
  #CAIRO_OPERATOR_SATURATE
EndEnumeration
 
ProcedureCDLL gtk_label_set_single_line_mode(*label,single_line)
    ProcedureReturn CallCFunctionFast(gtk_label_set_single_line_mode,*label,single_line)
EndProcedure
ProcedureCDLL gtk_window_set_icon_name(*window,*stock_icon)
    ProcedureReturn CallCFunctionFast(gtk_window_set_icon_name,*window,*stock_icon)
EndProcedure
ProcedureCDLL gtk_window_set_has_frame(*window,hasframe)
    ProcedureReturn CallCFunctionFast(gtk_window_set_has_frame,*window,hasframe)
EndProcedure
 
ProcedureCDLL gdk_screen_get_rgba_colormap(*widget)
    ProcedureReturn CallCFunctionFast(gdk_screen_get_rgba_colormap,*widget)
EndProcedure
ProcedureCDLL gdk_cairo_create(*context)
    ProcedureReturn CallCFunctionFast(gdk_cairo_create,*context)
EndProcedure   
ProcedureCDLL gdk_window_set_back_pixmap(*window,*image,relative)
    ProcedureReturn CallCFunctionFast(gdk_window_set_back_pixmap,*window,*image,relative)
EndProcedure   
 
ProcedureCDLL  cairo_set_source_rgba(*cairo,r.f,g.f,b.f,a.f)
    ProcedureReturn CallCFunctionFast(cairo_set_source_rgba,*cairo,r.f,g.f,b.f,a.f)
EndProcedure
ProcedureCDLL  cairo_set_source_rgb(*cairo,r.f,g.f,b.f) 
    ProcedureReturn CallCFunctionFast(cairo_set_source_rgb,*cairo,r.f,g.f,b.f) 
EndProcedure   
ProcedureCDLL cairo_set_operator(*cairo,type)
    ProcedureReturn CallCFunctionFast(cairo_set_operator,*cairo,type)
EndProcedure   
ProcedureCDLL cairo_paint(*cairo)
    ProcedureReturn CallCFunctionFast(cairo_paint,*cairo)
EndProcedure         
ProcedureCDLL cairo_stroke(*cairo);   
    ProcedureReturn CallCFunctionFast(cairo_stroke,*cairo);   
EndProcedure
ProcedureCDLL cairo_destroy(*cairo);
    ProcedureReturn CallCFunctionFast(cairo_destroy,*cairo)
EndProcedure   
   
;import needed functions missing in PB
;{
 
    mylib.s=find_library("libgtk-x11-2.0.so")
    If OpenLibrary(0,mylib)
        gtk_label_set_single_line_mode=GetFunction(0,"gtk_label_set_single_line_mode")
        gtk_window_set_icon_name=GetFunction(0,"gtk_window_set_icon_name")
        gtk_window_set_has_frame=GetFunction(0,"gtk_window_set_has_frame")
    EndIf   
    mylib1.s=find_library("libgdk_pixbuf-2.0.so")   
    If OpenLibrary(1,mylib1)   
        gdk_screen_get_rgba_colormap=GetFunction(1,"gdk_screen_get_rgba_colormap")
        gdk_cairo_create=GetFunction(1,"gdk_cairo_create")
        gdk_window_set_back_pixmap=GetFunction(1,"gdk_window_set_back_pixmap")
    EndIf   
    If gdk_screen_get_rgba_colormap = 0
        CloseLibrary(1)
        mylib1.s=find_library("libgdk_pixbuf-2.0.so.0")       
        If OpenLibrary(1,mylib1)   
            gdk_screen_get_rgba_colormap=GetFunction(1,"gdk_screen_get_rgba_colormap")
            gdk_cairo_create=GetFunction(1,"gdk_cairo_create")
            gdk_window_set_back_pixmap=GetFunction(1,"gdk_window_set_back_pixmap")
        EndIf   
    EndIf
    mylib2.s=find_library("libcairo.so")
    If OpenLibrary(2,mylib2)
        cairo_set_source_rgba=GetFunction(2,"cairo_set_source_rgba")
        cairo_set_source_rgb=GetFunction(2,"cairo_set_source_rgb") 
        cairo_set_operator=GetFunction(2,"cairo_set_operator")
        cairo_paint=GetFunction(2,"cairo_paint")
        cairo_stroke=GetFunction(2,"cairo_stroke")
        cairo_destroy=GetFunction(2,"cairo_destroy");
    EndIf
   
;}
 
ProcedureCDLL expose(hwnd, *event,*user_data)
*xhw.GtkWidget
*xhw=*user_data
*cr=gdk_cairo_create(*xhw\window)
If *cr
    If support_alpha_channel = #True
        cairo_set_source_rgba(*cr,1.0,1.0,1.0,0.0)
    Else
        cairo_set_source_rgb(*cr,1.0,1.0,1.0)
    EndIf   
    ;drawing the background
    cairo_set_operator(*cr,#cairo_operator_source)
    cairo_paint(*cr)
    cairo_destroy(*cr);
EndIf
ProcedureReturn  #False
EndProcedure
 
ProcedureCDLL screen_changed(*hwnd, *old_screen, *user_data)
;checking if an alpha channel is available for this screen/Windowmanager
*screen=gtk_widget_get_screen_(*hwnd)
*colormap=gdk_screen_get_rgba_colormap(*screen)
If *colormap ;yes, it is
    support_alpha_channel=#True
Else ; sorry
    MessageRequester("No Alpha Support", "Your Screen doesn't support an alpha channel...",#PB_MessageRequester_Ok)
    *colormap=gdk_screen_get_rgb_colormap_(*screen)
    support_alpha_channel=#False
EndIf   
; using the appropriate colormap For this screen
gtk_widget_set_colormap_(*hwnd,*colormap)
ProcedureReturn 1
EndProcedure
 
ProcedureCDLL clicked(*hwnd, *event, *user_data)
 
*hwnd=*user_data; ????? why? *hwnd is always zero.... but shouldn't
gtk_window_get_position_(*hwnd,@x,@y)
    If gtk_window_get_decorated_(*hwnd)=#True
        gtk_window_set_decorated_(*hwnd, #False)
    Else
        gtk_window_set_decorated_(*hwnd, #True)
    EndIf
gtk_window_move_(*hwnd,x,y)   
ProcedureReturn 1
EndProcedure
 
ProcedureCDLL exit_button_click(*widget,*event,*user_data)
;cleanup
gtk_main_quit_()
End
EndProcedure
 
*window1=gtk_window_new_(#GTK_WINDOW_TOPLEVEL)
gtk_window_set_title_(*window1,"Alpha test")
gtk_window_set_resizable_(*window1,#False)
gtk_window_move_(*window1,200,200)
*fixed1 = gtk_fixed_new_();
gtk_widget_show_(*fixed1);
gtk_container_add_(*window1, *fixed1);   
gtk_widget_set_parent_window_(*window1,*window)
   
*image=gtk_image_new_from_file_(TransparentImage$) ;<<<<<<<<<<<<--------------- &#228;ndern--------------------<<<<<<<<<<<<<<<<<<<
 
gtk_fixed_put_(*fixed1,*image,0,0)
gtk_widget_show_(*image)
 
g_signal_connect_object_(*window1,"expose-event" ,@expose(),*window,#G_CONNECT_SWAPPED);
g_signal_connect_object_(*window1, "screen-changed", @screen_changed(), *pointer,#G_CONNECT_SWAPPED);
g_signal_connect_object_(*window1,"delete-event",@exit_button_click(),*pointer,#G_CONNECT_SWAPPED)
gtk_widget_add_events_(*window1, #GDK_BUTTON_PRESS_MASK);
g_signal_connect_object_(*window1, "button-press-event", @clicked(), *pointer,#G_CONNECT_SWAPPED);
 
gtk_widget_set_app_paintable_(*window1, #True)
screen_changed(*window1, #Null, #Null);   
gtk_widget_show_all_(*window1)
 
gtk_main_()