diff options
author | Federico Mena Quintero <federico@helixcode.com> | 2000-12-03 01:35:22 +0800 |
---|---|---|
committer | Federico Mena Quintero <federico@src.gnome.org> | 2000-12-03 01:35:22 +0800 |
commit | f70c74f37110d1bcb23227c720965a058cabf61c (patch) | |
tree | 0cd81472b7a6e231f6160f6beece3d6c3a61bce5 /widgets/table/e-table-header-utils.c | |
parent | 4cffa30b1b778f3fa2b7e597e7bae589fc271a4e (diff) | |
download | gsoc2013-evolution-f70c74f37110d1bcb23227c720965a058cabf61c.tar.gz gsoc2013-evolution-f70c74f37110d1bcb23227c720965a058cabf61c.tar.zst gsoc2013-evolution-f70c74f37110d1bcb23227c720965a058cabf61c.zip |
Federico gets into pixel-perfect neurosis. Xmag is my best friend.
2000-12-01 Federico Mena Quintero <federico@helixcode.com>
Federico gets into pixel-perfect neurosis. Xmag is my best friend.
* e-table-item.c (eti_draw): Set the focus_gc stipple origin to
match the upper-left corner of the focus rectangle. This way
focusing will look consistent even among rows/columns with odd
pixel sizes. Also, make the focus rectangle span the whole cell;
there was one blank pixel column to the left of the rectangle.
* e-table-header-utils.c: New file with utilities for drawing
header buttons. This is so that ETableHeaderItem and
ETableFieldChooserItem can share the same code.
(e_table_header_compute_height): New function to compute the
height of a column button.
(make_composite_pixmap): New function to composite a pixbuf
against a solid background and make a pixmap out of the result.
This does some ultra-fancy fading-out of the original pixbuf if
the destination area is smaller than the source.
(compute_elision_length): New function to compute the elision
length in O(n log n) instead of O(n^2), for n = strlen (str).
(e_table_header_draw_button): New function to draw a header
button.
(e_table_draw_elided_string): New function to draw a string elided
to a maximum width.
* e-table-defines.h (HEADER_PADDING): Made the default padding be
1; now a header button's height is
content_height + 2 * (HEADER_PADDING + style->ythickness). This
is the correct way to measure button heights.
* e-table-field-chooser-item.c (etfci_find_button): Use
e_table_header_compute_height().
(etfci_reflow): Likewise.
(etfci_draw): Use e_table_header_draw_button().
(etfci_start_drag): Likewise.
(etfci_draw): Likewise.
(etfci_start_drag): Likewise.
(etfci_button_height): Removed function.
(draw_button): Removed function.
* e-table-header-item.c (draw_button): Removed function.
(e_table_header_item_get_height): Use e_table_header_compute_height().
(ethi_draw): e_table_header_draw_button().
(ethi_start_drag): Likewise.
(make_shaped_window_from_xpm): Fixed misspelling in function name.
(draw_button): Removed function.
* Makefile.am: Added e-table-header-utils.[ch].
svn path=/trunk/; revision=6766
Diffstat (limited to 'widgets/table/e-table-header-utils.c')
-rw-r--r-- | widgets/table/e-table-header-utils.c | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/widgets/table/e-table-header-utils.c b/widgets/table/e-table-header-utils.c new file mode 100644 index 0000000000..99fdba680f --- /dev/null +++ b/widgets/table/e-table-header-utils.c @@ -0,0 +1,419 @@ +/* ETable widget - utilities for drawing table header buttons + * + * Copyright (C) 2000 Helix Code, Inc. + * + * Authors: Chris Lahey <clahey@helixcode.com> + * Miguel de Icaza <miguel@helixcode.com> + * Federico Mena-Quintero <federico@helixcode.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <glib.h> +#include "e-table-defines.h" +#include "e-table-header-utils.h" + + + +/** + * e_table_header_compute_height: + * @ecol: Table column description. + * @style: Style for the button's bevel. + * @font: Font for the button's text, or NULL if no font is available. + * + * Computes the minimum height required for a table header button. + * + * Return value: The height of the button, in pixels. + **/ +int +e_table_header_compute_height (ETableCol *ecol, GtkStyle *style, GdkFont *font) +{ + int ythick; + int height; + + g_return_val_if_fail (ecol != NULL, -1); + g_return_val_if_fail (E_IS_TABLE_COL (ecol), -1); + g_return_val_if_fail (style != NULL, -1); + + ythick = style->klass->ythickness; + + if (font) + height = font->ascent + font->descent; + else + height = 16; /* FIXME: default? */ + + if (ecol->is_pixbuf) { + g_assert (ecol->pixbuf != NULL); + height = MAX (height, gdk_pixbuf_get_height (ecol->pixbuf)); + } + + height = MAX (height, MIN_ARROW_SIZE); + + height += 2 * (ythick + HEADER_PADDING); + + return height; +} + +/* Creates a pixmap that is a composite of a background color and the upper-left + * corner rectangle of a pixbuf. + */ +static GdkPixmap * +make_composite_pixmap (GdkDrawable *drawable, GdkGC *gc, + GdkPixbuf *pixbuf, GdkColor *bg, int width, int height, + int dither_xofs, int dither_yofs) +{ + int pwidth, pheight; + GdkPixmap *pixmap; + GdkPixbuf *tmp; + int color; + + pwidth = gdk_pixbuf_get_width (pixbuf); + pheight = gdk_pixbuf_get_height (pixbuf); + g_assert (width <= pwidth && height <= pheight); + + color = ((bg->red & 0xff00) << 8) | (bg->green & 0xff00) | ((bg->blue & 0xff00) >> 8); + + if (width >= pwidth && height >= pheight) { + tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height); + if (!tmp) + return NULL; + + gdk_pixbuf_composite_color (pixbuf, tmp, + 0, 0, + width, height, + 0, 0, + 1.0, 1.0, + GDK_INTERP_NEAREST, + 255, + 0, 0, + 16, + color, color); + } else { + int x, y, rowstride; + GdkPixbuf *fade; + guchar *pixels; + + /* Do a nice fade of the pixbuf down and to the right */ + + fade = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, width, height); + if (!fade) + return NULL; + + gdk_pixbuf_copy_area (pixbuf, + 0, 0, + width, height, + fade, + 0, 0); + + rowstride = gdk_pixbuf_get_rowstride (fade); + pixels = gdk_pixbuf_get_pixels (fade); + + for (y = 0; y < height; y++) { + guchar *p; + int yfactor; + + p = pixels + y * rowstride; + + if (height < pheight) + yfactor = height - y; + else + yfactor = height; + + for (x = 0; x < width; x++) { + int xfactor; + + if (width < pwidth) + xfactor = width - x; + else + xfactor = width; + + p[3] = ((int) p[3] * xfactor * yfactor / (width * height)); + p += 4; + } + } + + tmp = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height); + if (!tmp) { + gdk_pixbuf_unref (fade); + return NULL; + } + + gdk_pixbuf_composite_color (fade, tmp, + 0, 0, + width, height, + 0, 0, + 1.0, 1.0, + GDK_INTERP_NEAREST, + 255, + 0, 0, + 16, + color, color); + + gdk_pixbuf_unref (fade); + } + + pixmap = gdk_pixmap_new (drawable, width, height, gdk_rgb_get_visual ()->depth); + gdk_draw_rgb_image_dithalign (pixmap, gc, + 0, 0, + width, height, + GDK_RGB_DITHER_NORMAL, + gdk_pixbuf_get_pixels (tmp), + gdk_pixbuf_get_rowstride (tmp), + dither_xofs, dither_yofs); + gdk_pixbuf_unref (tmp); + + return pixmap; +} + +/** + * e_table_header_draw_button: + * @drawable: Destination drawable. + * @ecol: Table column for the header information. + * @style: Style to use for drawing the button. + * @font: Font for the button's text. + * @state: State of the table widget. + * @widget: The table widget. + * @gc: GC to use for drawing. + * @x: Leftmost coordinate of the button. + * @y: Topmost coordinate of the button. + * @width: Width of the region to draw. + * @height: Height of the region to draw. + * @button_width: Width for the complete button. + * @button_height: Height for the complete button. + * @arrow: Arrow type to use as a sort indicator. + * + * Draws a button suitable for a table header. + **/ +void +e_table_header_draw_button (GdkDrawable *drawable, ETableCol *ecol, + GtkStyle *style, GdkFont *font, GtkStateType state, + GtkWidget *widget, GdkGC *gc, + int x, int y, int width, int height, + int button_width, int button_height, + ETableColArrow arrow) +{ + int xthick, ythick; + int inner_x, inner_y; + int inner_width, inner_height; + + g_return_if_fail (drawable != NULL); + g_return_if_fail (ecol != NULL); + g_return_if_fail (E_IS_TABLE_COL (ecol)); + g_return_if_fail (style != NULL); + g_return_if_fail (font != NULL); + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_WIDGET (widget)); + g_return_if_fail (button_width > 0 && button_height > 0); + + xthick = style->klass->xthickness; + ythick = style->klass->ythickness; + + /* Button bevel */ + + gtk_paint_box (style, drawable, state, GTK_SHADOW_OUT, + NULL, widget, "button", + x, y, button_width, button_height); + + /* Inside area */ + + inner_width = button_width - 2 * (xthick + HEADER_PADDING); + inner_height = button_height - 2 * (ythick + HEADER_PADDING); + + if (inner_width < 1 || inner_height < 1) + return; /* nothing fits */ + + inner_x = x + xthick + HEADER_PADDING; + inner_y = y + ythick + HEADER_PADDING; + + /* Arrow */ + + switch (arrow) { + case E_TABLE_COL_ARROW_NONE: + break; + + case E_TABLE_COL_ARROW_UP: + case E_TABLE_COL_ARROW_DOWN: { + int arrow_width, arrow_height; + + arrow_width = MIN (MIN_ARROW_SIZE, inner_width); + arrow_height = MIN (MIN_ARROW_SIZE, inner_height); + + gtk_paint_arrow (style, drawable, state, + GTK_SHADOW_IN, NULL, widget, "header", + (arrow == E_TABLE_COL_ARROW_UP) ? GTK_ARROW_UP : GTK_ARROW_DOWN, + TRUE, + inner_x + inner_width - arrow_width, + inner_y + (inner_height - arrow_height) / 2, + arrow_width, arrow_height); + + inner_width -= arrow_width + HEADER_PADDING; + break; + } + + default: + g_assert_not_reached (); + return; + } + + if (inner_width < 1) + return; /* nothing else fits */ + + /* Pixbuf or label */ + + if (ecol->is_pixbuf) { + int pwidth, pheight; + int clip_width, clip_height; + GdkPixmap *pixmap; + + g_assert (ecol->pixbuf != NULL); + + pwidth = gdk_pixbuf_get_width (ecol->pixbuf); + pheight = gdk_pixbuf_get_height (ecol->pixbuf); + + clip_width = MIN (pwidth, inner_width); + clip_height = MIN (pheight, inner_height); + + pixmap = make_composite_pixmap (drawable, gc, + ecol->pixbuf, &style->bg[state], + clip_width, clip_height, + inner_x, + inner_y + (inner_height - clip_height) / 2); + if (pixmap) { + gdk_draw_pixmap (drawable, gc, pixmap, + 0, 0, + inner_x, + inner_y + (inner_height - clip_height) / 2, + clip_width, clip_height); + gdk_pixmap_unref (pixmap); + } + } else { + int ypos; + + ypos = inner_y + (inner_height - font->ascent - font->descent) / 2 + font->ascent; + + e_table_draw_elided_string (drawable, font, gc, + inner_x, ypos, + ecol->text, inner_width, TRUE); + } +} + +/* Computes the length of a string that needs to be trimmed for elision */ +static int +compute_elision_length (GdkFont *font, const char *str, int max_width) +{ + int len; + int l, left, right; + int rbearing; + + len = strlen (str); + g_assert (len > 0); + + left = 0; + right = len; + + while (left < right) { + l = (left + right) / 2; + gdk_text_extents (font, str, l, NULL, &rbearing, NULL, NULL, NULL); + + if (rbearing < max_width) + left = l + 1; + else if (rbearing > max_width) + right = l; + else + return l; + } + + if (rbearing > max_width) + return MAX (0, l - 1); + else + return l; +} + +/* Default width of the elision arrow in pixels */ +#define ARROW_WIDTH 4 + +/** + * e_table_draw_elided_string: + * @drawable: Destination drawable. + * @font: Font for the text. + * @gc: GC to use for drawing. + * @x: X insertion point for the string. + * @y: Y insertion point for the string's baseline. + * @str: String to draw. + * @max_width: Maximum width in which the string must fit. + * @center: Whether to center the string in the available area if it does fit. + * + * Draws a string, possibly trimming it so that it fits inside the specified + * maximum width. If it does not fit, an elision indicator is drawn after the + * last character that does fit. + **/ +void +e_table_draw_elided_string (GdkDrawable *drawable, GdkFont *font, GdkGC *gc, + int x, int y, const char *str, int max_width, gboolean center) +{ + int rbearing; + int width; + + g_return_if_fail (drawable != NULL); + g_return_if_fail (font != NULL); + g_return_if_fail (gc != NULL); + g_return_if_fail (str != NULL); + g_return_if_fail (max_width >= 0); + + gdk_string_extents (font, str, NULL, &rbearing, &width, NULL, NULL); + + if (rbearing <= max_width) { + int xpos; + + if (center) + xpos = x + (max_width - width) / 2; + else + xpos = x; + + gdk_draw_string (drawable, font, gc, xpos, y, str); + } else { + int arrow_width; + int len; + int i; + + if (max_width < ARROW_WIDTH + 1) + arrow_width = max_width - 1; + else + arrow_width = ARROW_WIDTH; + + len = compute_elision_length (font, str, max_width - arrow_width - 1); + gdk_draw_text (drawable, font, gc, x, y, str, len); + + gdk_text_extents (font, str, len, NULL, &rbearing, NULL, NULL, NULL); + + y -= font->ascent; + + for (i = 0; i < arrow_width; i++) { + int h; + + h = 2 * i + 1; + + gdk_draw_line (drawable, gc, + x + rbearing + arrow_width - i, + y + (font->ascent + font->descent - h) / 2, + x + rbearing + arrow_width - i, + y + (font->ascent + font->descent - h) / 2 + h - 1); + } + } +} |