forked from AuroraMiddleware/gtk
14a5e057c7
Mon Oct 29 15:41:58 2001 Jonathan Blandford <jrb@redhat.com> * gtk/gtktreemodelsort.c (gtk_tree_model_sort_sort_level): Darn. I can't believe this took this long to fix.
262 lines
6.4 KiB
Plaintext
262 lines
6.4 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
|
|
GtkPreview
|
|
|
|
<!-- ##### SECTION Short_Description ##### -->
|
|
a widget to display RGB or grayscale data.
|
|
|
|
<!-- ##### SECTION Long_Description ##### -->
|
|
<para>
|
|
The #GtkPreview widget provides a simple interface
|
|
used to display images as RGB or grayscale data.
|
|
</para>
|
|
|
|
<!-- ##### SECTION See_Also ##### -->
|
|
<para>
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
<term>#GdkRGB</term>
|
|
<listitem><para>the backend used by #GtkPreview.</para></listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
</para>
|
|
|
|
<!-- ##### STRUCT GtkPreview ##### -->
|
|
<para>
|
|
The #GtkPreview-struct struct contains private data only, and
|
|
should be accessed using the functions below.
|
|
</para>
|
|
|
|
|
|
<!-- ##### STRUCT GtkPreviewInfo ##### -->
|
|
<para>
|
|
Contains information about global properties
|
|
of preview widgets.
|
|
|
|
The #GtkPreviewInfo struct contains the following fields.
|
|
(These fields should be considered read-only. They should never be set by
|
|
an application.)
|
|
|
|
<informaltable pgwide=1 frame="none" role="struct">
|
|
<tgroup cols="2"><colspec colwidth="2*"><colspec colwidth="8*">
|
|
<tbody>
|
|
|
|
<row>
|
|
<entry>#GdkVisual *visual;</entry>
|
|
<entry>the visual used by all previews.</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry>#GdkColormap *cmap;</entry>
|
|
<entry>the colormap used by all previews.</entry>
|
|
</row>
|
|
|
|
<row>
|
|
<entry>gdouble gamma;</entry>
|
|
<entry>the gamma correction value used by all previews (See gtk_preview_set_gamma()).</entry>
|
|
</row>
|
|
|
|
</tbody>
|
|
</tgroup>
|
|
</informaltable>
|
|
|
|
</para>
|
|
|
|
@lookup:
|
|
@gamma:
|
|
|
|
<!-- ##### UNION GtkDitherInfo ##### -->
|
|
<para>
|
|
This union not used in GTK+.
|
|
</para>
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_uninit ##### -->
|
|
<para>
|
|
This function is deprecated and does nothing.
|
|
</para>
|
|
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_new ##### -->
|
|
<para>
|
|
Create a new preview widget.
|
|
</para>
|
|
|
|
@type: the type data contained by the widget.
|
|
(Grayscale or RGB)
|
|
@Returns:
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_size ##### -->
|
|
<para>
|
|
Set the size that the preview widget will request
|
|
in response to a "size_request" signal. The
|
|
drawing area may actually be allocated a size
|
|
larger than this depending on how it is packed
|
|
within the enclosing containers. The effect
|
|
of this is determined by whether the preview
|
|
is set to expand or not (see gtk_preview_expand())
|
|
</para>
|
|
|
|
@preview: a #GtkPreview.
|
|
@width: the new width.
|
|
@height: the new height.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_put ##### -->
|
|
<para>
|
|
Takes a portion of the contents of a preview widget
|
|
and draws it onto the given drawable, @window.
|
|
</para>
|
|
|
|
@preview: a #GtkPreview.
|
|
@window: a window or pixmap.
|
|
@gc: The graphics context for the operation. Only the
|
|
clip mask for this GC matters.
|
|
@srcx: the x coordinate of the upper left corner in the source image.
|
|
@srcy: the y coordinate of the upper left corner in the source image.
|
|
@destx: the x coordinate of the upper left corner in the destination image.
|
|
@desty: the y coordinate of the upper left corner in the destination image.
|
|
@width: the width of the rectangular portion to draw.
|
|
@height: the height of the rectangular portion to draw.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_draw_row ##### -->
|
|
<para>
|
|
Sets the data for a portion of a row.
|
|
</para>
|
|
|
|
@preview: a #GtkPreview.
|
|
@data: the new data for the portion. It should contain
|
|
@w bytes of data if the preview is of type
|
|
GTK_TYPE_GRAYSCALE, and 3*@w bytes of data
|
|
if the preview is of type GTK_TYPE_COLOR.
|
|
@x: the starting value on the row to set.
|
|
@y: the row to change.
|
|
@w: the number of pixels in the row to change.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_set_expand ##### -->
|
|
<para>
|
|
Determines the way that the the preview widget behaves
|
|
when the size it is allocated is larger than the requested
|
|
size. If @expand is %FALSE, then the preview's window
|
|
and buffer will be no larger than the size set with
|
|
gtk_preview_size(), and the data set will be centered
|
|
in the allocation if it is larger. If @expand is %TRUE
|
|
then the window and buffer will expand with the allocation;
|
|
the application is responsible for catching
|
|
the "size_allocate" signal and providing the data
|
|
appropriate for this size.
|
|
</para>
|
|
|
|
@preview: a #GtkPreview.
|
|
@expand: whether the preview's window should expand or not.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_set_gamma ##### -->
|
|
<para>
|
|
Set the gamma-correction value for all preview widgets.
|
|
(This function will eventually be replaced with a
|
|
function that sets a per-preview-widget gamma value).
|
|
The resulting intensity is given by:
|
|
<literal>destination_value * pow (source_value/255, 1/gamma)</literal>.
|
|
The gamma value is applied when the data is
|
|
set with gtk_preview_draw_row() so changing this
|
|
value will not affect existing data in preview
|
|
widgets.
|
|
</para>
|
|
|
|
@gamma: the new gamma value.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_set_color_cube ##### -->
|
|
<para>
|
|
This function is deprecated and does nothing. GdkRGB
|
|
automatically picks an optimium color cube for the
|
|
display.
|
|
</para>
|
|
|
|
@nred_shades: ignored
|
|
@ngreen_shades: ignored
|
|
@nblue_shades: ignored
|
|
@ngray_shades: ignored
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_set_install_cmap ##### -->
|
|
<para>
|
|
This function is deprecated
|
|
and does nothing. GdkRGB will automatically pick
|
|
a private colormap if it cannot allocate sufficient
|
|
colors.
|
|
</para>
|
|
|
|
@install_cmap: ignored.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_set_reserved ##### -->
|
|
<para>
|
|
This function is deprecated and does nothing.
|
|
</para>
|
|
|
|
@nreserved: ignored.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_set_dither ##### -->
|
|
<para>
|
|
Set the dithering mode for the display.
|
|
</para>
|
|
|
|
@preview: a #GtkPreview.
|
|
@dither: the dithering mode.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_get_visual ##### -->
|
|
<para>
|
|
Returns the visual used by preview widgets. This
|
|
function is deprecated, and you should use
|
|
gdk_rgb_get_visual() instead.
|
|
</para>
|
|
|
|
@Returns: the visual for previews.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_get_cmap ##### -->
|
|
<para>
|
|
Returns the colormap used by preview widgets. This
|
|
function is deprecated, and you should use
|
|
gdk_rgb_get_cmap() instead.
|
|
</para>
|
|
|
|
@Returns: the colormap for previews.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_get_info ##### -->
|
|
<para>
|
|
Return a #GtkPreviewInfo structure containing
|
|
global information about preview widgets.
|
|
</para>
|
|
|
|
@Returns: a #GtkPreviewInfo structure. The return
|
|
value belongs to GTK+ and must not be modified
|
|
or freed.
|
|
|
|
|
|
<!-- ##### FUNCTION gtk_preview_reset ##### -->
|
|
<para>
|
|
This function is deprecated and does nothing. It was
|
|
once used for changing the colormap and visual on the fly.
|
|
</para>
|
|
|
|
|
|
|
|
<!-- ##### ARG GtkPreview:expand ##### -->
|
|
<para>
|
|
Determines the way that the the preview widget behaves
|
|
when the size it is allocated is larger than the requested
|
|
size. See gtk_preview_set_expand().
|
|
</para>
|
|
|