diff options
Diffstat (limited to 'src/widgets/sp-color-preview.cpp')
| -rw-r--r-- | src/widgets/sp-color-preview.cpp | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/src/widgets/sp-color-preview.cpp b/src/widgets/sp-color-preview.cpp new file mode 100644 index 000000000..0139abc5a --- /dev/null +++ b/src/widgets/sp-color-preview.cpp @@ -0,0 +1,196 @@ +#define __SP_COLOR_PREVIEW_C__ + +/* + * A simple color preview widget + * + * Author: + * Lauris Kaplinski <lauris@kaplinski.com> + * + * Copyright (C) 2001-2002 Lauris Kaplinski + * Copyright (C) 2001 Ximian, Inc. + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#include "../display/nr-plain-stuff-gdk.h" +#include "sp-color-preview.h" + +#define SPCP_DEFAULT_WIDTH 32 +#define SPCP_DEFAULT_HEIGHT 11 + +static void sp_color_preview_class_init (SPColorPreviewClass *klass); +static void sp_color_preview_init (SPColorPreview *image); +static void sp_color_preview_destroy (GtkObject *object); + +static void sp_color_preview_size_request (GtkWidget *widget, GtkRequisition *requisition); +static void sp_color_preview_size_allocate (GtkWidget *widget, GtkAllocation *allocation); +static gint sp_color_preview_expose (GtkWidget *widget, GdkEventExpose *event); + +static void sp_color_preview_paint (SPColorPreview *cp, GdkRectangle *area); + +static GtkWidgetClass *parent_class; + +GtkType +sp_color_preview_get_type (void) +{ + static GtkType type = 0; + if (!type) { + GtkTypeInfo info = { + "SPColorPreview", + sizeof (SPColorPreview), + sizeof (SPColorPreviewClass), + (GtkClassInitFunc) sp_color_preview_class_init, + (GtkObjectInitFunc) sp_color_preview_init, + NULL, NULL, NULL + }; + type = gtk_type_unique (GTK_TYPE_WIDGET, &info); + } + return type; +} + +static void +sp_color_preview_class_init (SPColorPreviewClass *klass) +{ + GtkObjectClass *object_class; + GtkWidgetClass *widget_class; + + object_class = (GtkObjectClass *) klass; + widget_class = (GtkWidgetClass *) klass; + + parent_class = (GtkWidgetClass*)gtk_type_class (GTK_TYPE_WIDGET); + + object_class->destroy = sp_color_preview_destroy; + + widget_class->size_request = sp_color_preview_size_request; + widget_class->size_allocate = sp_color_preview_size_allocate; + widget_class->expose_event = sp_color_preview_expose; +} + +static void +sp_color_preview_init (SPColorPreview *image) +{ + GTK_WIDGET_SET_FLAGS (image, GTK_NO_WINDOW); + + image->rgba = 0xffffffff; +} + +static void +sp_color_preview_destroy (GtkObject *object) +{ + SPColorPreview *image; + + image = SP_COLOR_PREVIEW (object); + + if (((GtkObjectClass *) (parent_class))->destroy) + (* ((GtkObjectClass *) (parent_class))->destroy) (object); +} + +static void +sp_color_preview_size_request (GtkWidget *widget, GtkRequisition *requisition) +{ + SPColorPreview *slider; + + slider = SP_COLOR_PREVIEW (widget); + + requisition->width = SPCP_DEFAULT_WIDTH; + requisition->height = SPCP_DEFAULT_HEIGHT; +} + +static void +sp_color_preview_size_allocate (GtkWidget *widget, GtkAllocation *allocation) +{ + SPColorPreview *image; + + image = SP_COLOR_PREVIEW (widget); + + widget->allocation = *allocation; + + if (GTK_WIDGET_DRAWABLE (image)) { + gtk_widget_queue_draw (GTK_WIDGET (image)); + } +} + +static gint +sp_color_preview_expose (GtkWidget *widget, GdkEventExpose *event) +{ + SPColorPreview *cp; + + cp = SP_COLOR_PREVIEW (widget); + + if (GTK_WIDGET_DRAWABLE (widget)) { + sp_color_preview_paint (cp, &event->area); + } + + return TRUE; +} + +GtkWidget * +sp_color_preview_new (guint32 rgba) +{ + SPColorPreview *image; + + image = (SPColorPreview*)gtk_type_new (SP_TYPE_COLOR_PREVIEW); + + sp_color_preview_set_rgba32 (image, rgba); + + return (GtkWidget *) image; +} + +void +sp_color_preview_set_rgba32 (SPColorPreview *cp, guint32 rgba) +{ + cp->rgba = rgba; + + if (GTK_WIDGET_DRAWABLE (cp)) { + gtk_widget_queue_draw (GTK_WIDGET (cp)); + } +} + +static void +sp_color_preview_paint (SPColorPreview *cp, GdkRectangle *area) +{ + GtkWidget *widget; + GdkRectangle warea, carea; + GdkRectangle wpaint, cpaint; + gint w2; + + widget = GTK_WIDGET (cp); + + warea.x = widget->allocation.x; + warea.y = widget->allocation.y; + warea.width = widget->allocation.width; + warea.height = widget->allocation.height; + + if (!gdk_rectangle_intersect (area, &warea, &wpaint)) return; + + /* Transparent area */ + + w2 = warea.width / 2; + + carea.x = warea.x; + carea.y = warea.y; + carea.width = w2; + carea.height = warea.height; + + if (gdk_rectangle_intersect (area, &carea, &cpaint)) { + nr_gdk_draw_rgba32_solid (widget->window, widget->style->black_gc, + cpaint.x, cpaint.y, + cpaint.width, cpaint.height, + cp->rgba); + } + + /* Solid area */ + + carea.x = warea.x + w2; + carea.y = warea.y; + carea.width = warea.width - w2; + carea.height = warea.height; + + if (gdk_rectangle_intersect (area, &carea, &cpaint)) { + nr_gdk_draw_rgba32_solid (widget->window, widget->style->black_gc, + cpaint.x, cpaint.y, + cpaint.width, cpaint.height, + cp->rgba | 0xff); + } +} + |