Added a button cell renderer. No events yet. Now to test.
This commit is contained in:
Pietro Gagliardi
parent
8b04f2062a
commit
575f4f3053
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@ -8,6 +8,7 @@ list(APPEND _LIBUI_SOURCES
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unix/area.c
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unix/box.c
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unix/button.c
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unix/cellrendererbutton.c
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unix/checkbox.c
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unix/child.c
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unix/colorbutton.c
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@ -0,0 +1,231 @@
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// 28 june 2016
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#include "uipriv_unix.h"
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#define cellRendererButtonType (cellRendererButton_get_type())
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#define cellRendererButton(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), cellRendererButtonType, cellRendererButton))
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#define isCellRendererButton(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), cellRendererButtonType))
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#define cellRendererButtonClass(class) (G_TYPE_CHECK_CLASS_CAST((class), cellRendererButtonType, cellRendererButtonClass))
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#define isCellRendererButtonClass(class) (G_TYPE_CHECK_CLASS_TYPE((class), cellRendererButton))
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#define getCellRendererButtonClass(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), cellRendererButtonType, cellRendererButtonClass))
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typedef struct cellRendererButton cellRendererButton;
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typedef struct cellRendererButtonClass cellRendererButtonClass;
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struct cellRendererButton {
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GtkCellRenderer parent_instance;
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char *text;
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};
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struct cellRendererButtonClass {
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GtkCellRendererClass parent_class;
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};
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G_DEFINE_TYPE(cellRendererButton, cellRendererButton, GTK_TYPE_CELL_RENDERER)
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static void cellRendererButton_init(cellRendererButton *m)
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{
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// nothing to do
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}
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static void cellRendererButton_dispose(GObject *obj)
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{
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G_OBJECT_CLASS(cellRendererButton_parent_class)->dispose(obj);
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}
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static void cellRendererButton_finalize(GObject *obj)
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{
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cellRendererButton *c = cellRendererButton(obj);
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if (c->text != NULL) {
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g_free(c->text);
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c->text = NULL;
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}
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G_OBJECT_CLASS(cellRendererButton_parent_class)->finalize(obj);
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}
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static GtkSizeRequestMode cellRendererButton_get_request_mode(GtkCellRenderer *r)
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{
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return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
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}
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// this is basically what GtkCellRendererToggle did in 3.10
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static GtkStyleContext *setButtonStyle(GtkWidget *widget)
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{
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GtkStyleContext *context;
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context = gtk_widget_get_style_context(widget);
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gtk_style_context_save(context);
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gtk_style_context_add_class(context, GTK_STYLE_CLASS_BUTTON);
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return context;
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}
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// this is based on what GtkCellRendererText does
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static void cellRendererButton_get_preferred_width(GtkCellRenderer *r, GtkWidget *widget, gint *minimum, gint *natural)
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{
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cellRendererButton *c = cellRendererButton(r);
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gint xpad;
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GtkStyleContext *context;
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PangoLayout *layout;
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PangoRectangle rect;
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gint out;
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gtk_cell_renderer_get_padding(GTK_CELL_RENDERER(c), &xpad, NULL);
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context = setButtonStyle(widget);
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layout = gtk_widget_create_pango_layout(widget, c->text);
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pango_layout_set_width(layout, -1);
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pango_layout_get_extents(layout, NULL, &rect);
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g_object_unref(layout);
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gtk_style_context_restore(context);
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out = 2 * xpad + PANGO_PIXELS_CEIL(rect.width);
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if (minimum != NULL)
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*minimum = out;
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if (natural != NULL)
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*natural = out;
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}
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// this is based on what GtkCellRendererText does
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static void cellRendererButton_get_preferred_height_for_width(GtkCellRenderer *r, GtkWidget *widget, gint width, gint *minimum, gint *natural)
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{
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cellRendererButton *c = cellRendererButton(r);
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gint xpad, ypad;
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GtkStyleContext *context;
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PangoLayout *layout;
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gint height;
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gint out;
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gtk_cell_renderer_get_padding(GTK_CELL_RENDERER(c), &xpad, &ypad);
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context = setButtonStyle(widget);
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layout = gtk_widget_create_pango_layout(widget, c->text);
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pango_layout_set_width(layout, ((2 * xpad + width) * PANGO_SCALE));
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pango_layout_get_pixel_size(layout, NULL, &height);
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g_object_unref(layout);
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gtk_style_context_restore(context);
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out = 2 * ypad + height;
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if (minimum != NULL)
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*minimum = out;
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if (natural != NULL)
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*natural = out;
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}
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// this is basically what GtkCellRendererText does
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static void cellRendererButton_get_preferred_height(GtkCellRenderer *r, GtkWidget *widget, gint *minimum, gint *natural)
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{
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gint width;
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gtk_cell_renderer_get_preferred_width(r, widget, &width, NULL);
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gtk_cell_renderer_get_preferred_height_for_width(r, widget, width, minimum, natural);
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}
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// this is based on what GtkCellRendererText does
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static void cellRendererButton_get_aligned_area(GtkCellRenderer *r, GtkWidget *widget, GtkCellRendererState flags, const GdkRectangle *cell_area, GdkRectangle *aligned_area)
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{
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cellRendererButton *c = cellRendererButton(r);
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gint xpad, ypad;
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GtkStyleContext *context;
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PangoLayout *layout;
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PangoRectangle rect;
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gfloat xalign, yalign;
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gint xoffset, yoffset;
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gtk_cell_renderer_get_padding(GTK_CELL_RENDERER(c), &xpad, &ypad);
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context = setButtonStyle(widget);
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layout = gtk_widget_create_pango_layout(widget, c->text);
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pango_layout_set_width(layout, -1);
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pango_layout_get_pixel_extents(layout, NULL, &rect);
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xoffset = 0;
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yoffset = 0;
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if (cell_area != NULL) {
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gtk_cell_renderer_get_alignment(GTK_CELL_RENDERER(c), &xalign, &yalign);
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xoffset = cell_area->width - (2 * xpad + rect.width);
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// use explicit casts just to be safe
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if (gtk_widget_get_direction(widget) == GTK_TEXT_DIR_RTL)
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xoffset = ((gdouble) xoffset) * (1.0 - xalign);
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else
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xoffset *= ((gdouble) xoffset) * xalign;
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yoffset = yalign * (cell_area->height - (2 * ypad + rect.height));
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yoffset = MAX(yoffset, 0);
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}
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aligned_area->x = cell_area->x + xoffset;
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aligned_area->y = cell_area->y + yoffset;
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aligned_area->width = 2 * xpad + rect.width;
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aligned_area->height = 2 * ypad + rect.height;
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g_object_unref(layout);
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gtk_style_context_restore(context);
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}
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// this is based on both what GtkCellRendererText does and what GtkCellRendererToggle does
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static void cellRendererButton_render(GtkCellRenderer *r, cairo_t *cr, GtkWidget *widget, const GdkRectangle *background_area, const GdkRectangle *cell_area, GtkCellRendererState flags)
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{
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cellRendererButton *c = cellRendererButton(r);
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gint xpad, ypad;
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GdkRectangle alignedArea;
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gint xoffset, yoffset;
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GtkStyleContext *context;
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PangoLayout *layout;
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PangoRectangle rect;
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gtk_cell_renderer_get_padding(GTK_CELL_RENDERER(c), &xpad, &ypad);
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gtk_cell_renderer_get_aligned_area(GTK_CELL_RENDERER(c), widget, flags, cell_area, &alignedArea);
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xoffset = alignedArea.x - cell_area->x;
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yoffset = alignedArea.y - cell_area->y;
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context = setButtonStyle(widget);
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layout = gtk_widget_create_pango_layout(widget, c->text);
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gtk_render_background(context, cr,
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background_area->x + xoffset + xpad,
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background_area->y + yoffset + ypad,
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background_area->width - 2 * xpad,
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background_area->height - 2 * ypad);
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gtk_render_frame(context, cr,
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background_area->x + xoffset + xpad,
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background_area->y + yoffset + ypad,
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background_area->width - 2 * xpad,
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background_area->height - 2 * ypad);
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pango_layout_set_width(layout, -1);
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pango_layout_get_pixel_extents(layout, NULL, &rect);
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xoffset -= rect.x;
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gtk_render_layout(context, cr,
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cell_area->x + xoffset + xpad,
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cell_area->y + yoffset + ypad,
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layout);
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g_object_unref(layout);
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gtk_style_context_restore(context);
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}
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static gboolean cellRendererButton_activate(GtkCellRenderer *r, GdkEvent *e, GtkWidget *widget, const gchar *path, const GdkRectangle *background_area, const GdkRectangle *cell_area, GtkCellRendererState flags)
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{
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// TODO
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return FALSE;
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}
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static void cellRendererButton_class_init(cellRendererButtonClass *class)
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{
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G_OBJECT_CLASS(class)->dispose = cellRendererButton_dispose;
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G_OBJECT_CLASS(class)->finalize = cellRendererButton_finalize;
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GTK_CELL_RENDERER_CLASS(class)->get_request_mode = cellRendererButton_get_request_mode;
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GTK_CELL_RENDERER_CLASS(class)->get_preferred_width = cellRendererButton_get_preferred_width;
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GTK_CELL_RENDERER_CLASS(class)->get_preferred_height_for_width = cellRendererButton_get_preferred_height_for_width;
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GTK_CELL_RENDERER_CLASS(class)->get_preferred_height = cellRendererButton_get_preferred_height;
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// don't provide a get_preferred_width_for_height()
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GTK_CELL_RENDERER_CLASS(class)->get_aligned_area = cellRendererButton_get_aligned_area;
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// don't provide a get_size()
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GTK_CELL_RENDERER_CLASS(class)->render = cellRendererButton_render;
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GTK_CELL_RENDERER_CLASS(class)->activate = cellRendererButton_activate;
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// don't provide a start_editing()
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}
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GtkCellRenderer *newCellRendererButton(void)
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{
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return GTK_CELL_RENDERER(g_object_new(cellRendererButtonType, NULL));
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}
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@ -54,3 +54,6 @@ extern ptrdiff_t *graphemes(const char *text, PangoContext *context);
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// image.c
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extern cairo_surface_t *imageAppropriateSurface(uiImage *i, GtkWidget *w);
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// cellrendererbutton.c
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extern GtkCellRenderer *newCellRendererButton(void);
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