Index

Package: Style

Description

package Gtkada.Style is
Utility functions that mimic Gtk.Style drawing methods, but using Cairo instead of Gdk. This allow smooth transition to Gtk3 that will get rid of those Gdk drawing methods and only use Cairo.

Types

Cairo_Color_Val 

subtype Cairo_Color_Val is Glib.Gdouble range 0.0 .. 1.0;
In cairo, the color components are expressed as percents.

Cairo_Color 

type Cairo_Color is record
      R, G, B : Cairo_Color_Val;
      Alpha   : Cairo_Color_Val := 1.0;
   end record;

HSV_Color 

type HSV_Color is record
      H, S, V, A : Cairo_Color_Val;
   end record;
Used when manipulating Cairo color. The HSV color space is useful when wanting to shade a color (change it's value), (de)saturate it, or modify its hue.

Subprograms & Entries

To_HSV 

function To_HSV 
(Color: Cairo_Color) return HSV_Color;

To_Cairo 

function To_Cairo 
(HSV: HSV_Color) return Cairo_Color;

To_Cairo 

function To_Cairo 
(Color: Gdk.Color.Gdk_Color) return Cairo_Color;
Translations between one color definition to another

Shade 

function Shade 
(Color: Gdk.Color.Gdk_Color;
Value: Glib.Gdouble) return Cairo_Color;

Shade 

function Shade 
(Color: Cairo_Color;
Value: Glib.Gdouble) return Cairo_Color;
Modifies the lightning of the color by the specified value

Set_Source_Color 

procedure Set_Source_Color 
(Cr: Cairo.Cairo_Context;
Color: Cairo_Color);

Rounded_Rectangle 

procedure Rounded_Rectangle 
(Cr: Cairo.Cairo_Context;
X, Y, W, H: Glib.Gdouble;
Radius: Glib.Gdouble);
Draws a rounded rectangle at coordinate X, Y with W and H size. If Radius > 0, then the corner will be rounded.

Draw_Shadow 

procedure Draw_Shadow 
(Cr: Cairo.Cairo_Context;
Style: Gtk.Style.Gtk_Style;
Shadow_Type: Gtk.Enums.Gtk_Shadow_Type;
X, Y, Width, Height: Glib.Gint;
Corner_Radius: Glib.Gdouble := 0.0);
Draws a Frame of size Width x Height at position (X, Y) and (X2, Y2) using the specified color. Corner_Radius allows you to draw a rounded frame if set to a value > 0. Additional drawing styles can be specified by using Cairo.Set_Line_XXXX on the Cairo_Context before calling this procedure.

Draw_Rectangle 

procedure Draw_Rectangle 
(Cr: Cairo.Cairo_Context;
Color: Cairo_Color;
Filled: Boolean;
X, Y, Width, Height: Glib.Gint;
Corner_Radius: Glib.Gdouble := 0.0);

Draw_Rectangle 

procedure Draw_Rectangle 
(Cr: Cairo.Cairo_Context;
Color: Gdk.Color.Gdk_Color;
Filled: Boolean;
X, Y, Width, Height: Glib.Gint;
Corner_Radius: Glib.Gdouble := 0.0);
Draws a rectangle of size Width x Height at position (X, Y) and (X2, Y2) using the specified color. Corner_Radius allows you to draw a rounded rectangle if set to a value > 0.0 Additional drawing styles can be specified by using Cairo.Set_Line_XXXX on the Cairo_Context before calling this procedure.

Draw_Line 

procedure Draw_Line 
(Cr: Cairo.Cairo_Context;
Color: Cairo_Color;
X1, Y1, X2, Y2: Glib.Gint);

Draw_Line 

procedure Draw_Line 
(Cr: Cairo.Cairo_Context;
Color: Gdk.Color.Gdk_Color;
X1, Y1, X2, Y2: Glib.Gint);
Draws a line between (X1, Y1) and (X2, Y2) using the specified color. Additional drawing styles can be specified by using Cairo.Set_Line_XXXX on the Cairo_Context before calling this procedure.

Draw_Layout 

procedure Draw_Layout 
(Cr: Cairo.Cairo_Context;
Color: Cairo_Color;
X, Y: Glib.Gint;
Layout: Pango.Layout.Pango_Layout);

Draw_Layout 

procedure Draw_Layout 
(Cr: Cairo.Cairo_Context;
Color: Gdk.Color.Gdk_Color;
X, Y: Glib.Gint;
Layout: Pango.Layout.Pango_Layout);
Draws the Pango layout at position (X, Y) using Color.

Draw_Pixbuf 

procedure Draw_Pixbuf 
(Cr: Cairo.Cairo_Context;
Pixbuf: Gdk.Pixbuf.Gdk_Pixbuf;
X, Y: Glib.Gint);
Draws a pixbuf at coordinate X, Y Note that Gdk_Pixmap or Gdk_Bitmap are not supported, as those are server-side images, so depend on a surface attached to a screen. As a result, those would not be drawn on a non-screen surface (such as an internal Image_Surface).