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Diffstat (limited to 'tikzit/src/linux/EdgeStyleSelector.m')
-rw-r--r-- | tikzit/src/linux/EdgeStyleSelector.m | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/tikzit/src/linux/EdgeStyleSelector.m b/tikzit/src/linux/EdgeStyleSelector.m new file mode 100644 index 0000000..243d176 --- /dev/null +++ b/tikzit/src/linux/EdgeStyleSelector.m @@ -0,0 +1,454 @@ +/* + * Copyright 2012 Alex Merry <dev@randomguy3.me.uk> + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#import "EdgeStyleSelector.h" + +#import "CairoRenderContext.h" +#import "Shape.h" +#import "Shape+Render.h" +#import "ShapeNames.h" +#import "StyleManager.h" + +#import <gdk-pixbuf/gdk-pixbuf.h> + +// {{{ Internal interfaces +// {{{ Signals +static void selection_changed_cb (GtkTreeSelection *sel, EdgeStyleSelector *mgr); +// }}} + +enum { + STYLES_NAME_COL = 0, + STYLES_ICON_COL, + STYLES_PTR_COL, + STYLES_N_COLS +}; + +@interface EdgeStyleSelector (Notifications) +- (void) stylesReplaced:(NSNotification*)notification; +- (void) styleAdded:(NSNotification*)notification; +- (void) styleRemoved:(NSNotification*)notification; +- (void) activeStyleChanged:(NSNotification*)notification; +- (void) stylePropertyChanged:(NSNotification*)notification; +- (void) shapeDictionaryReplaced:(NSNotification*)n; +- (void) selectionChanged; +@end + +@interface EdgeStyleSelector (Private) +- (void) clearModel; +- (cairo_surface_t*) createEdgeIconSurface; +- (GdkPixbuf*) pixbufOfEdgeInStyle:(EdgeStyle*)style; +- (GdkPixbuf*) pixbufFromSurface:(cairo_surface_t*)surface; +- (GdkPixbuf*) pixbufOfEdgeInStyle:(EdgeStyle*)style usingSurface:(cairo_surface_t*)surface; +- (void) addStyle:(EdgeStyle*)style; +- (void) postSelectedStyleChanged; +- (void) reloadStyles; +@end + +// }}} +// {{{ API + +@implementation EdgeStyleSelector + +- (id) init { + self = [self initWithStyleManager:[StyleManager manager]]; + return self; +} + +- (id) initWithStyleManager:(StyleManager*)m { + self = [super init]; + + if (self) { + styleManager = nil; + linkedToActiveStyle = YES; + + store = gtk_list_store_new (STYLES_N_COLS, + G_TYPE_STRING, + GDK_TYPE_PIXBUF, + G_TYPE_POINTER); + g_object_ref (store); + + view = GTK_TREE_VIEW (gtk_tree_view_new_with_model (GTK_TREE_MODEL (store))); + gtk_tree_view_set_headers_visible (view, FALSE); + g_object_ref (view); + + GtkCellRenderer *renderer; + GtkTreeViewColumn *column; + renderer = gtk_cell_renderer_pixbuf_new (); + column = gtk_tree_view_column_new_with_attributes ("Preview", + renderer, + "pixbuf", STYLES_ICON_COL, + NULL); + gtk_tree_view_append_column (view, column); + gtk_tree_view_set_tooltip_column (view, STYLES_NAME_COL); + + GtkTreeSelection *sel = gtk_tree_view_get_selection (view); + gtk_tree_selection_set_mode (sel, GTK_SELECTION_SINGLE); + + g_signal_connect (G_OBJECT (sel), + "changed", + G_CALLBACK (selection_changed_cb), + self); + + [self setStyleManager:m]; + + [[NSNotificationCenter defaultCenter] addObserver:self + selector:@selector(stylePropertyChanged:) + name:@"EdgeStylePropertyChanged" + object:nil]; + [[NSNotificationCenter defaultCenter] addObserver:self + selector:@selector(shapeDictionaryReplaced:) + name:@"ShapeDictionaryReplaced" + object:[Shape class]]; + } + + return self; +} + +- (void) dealloc { + [[NSNotificationCenter defaultCenter] removeObserver:self]; + g_object_unref (view); + [self clearModel]; + g_object_unref (store); + [styleManager release]; + + [super dealloc]; +} + +- (StyleManager*) styleManager { + return styleManager; +} + +- (void) setStyleManager:(StyleManager*)m { + if (m == nil) { + [NSException raise:NSInvalidArgumentException format:@"Style manager cannot be nil"]; + } + [m retain]; + + [[NSNotificationCenter defaultCenter] removeObserver:self name:nil object:styleManager]; + [[NSNotificationCenter defaultCenter] addObserver:self + selector:@selector(stylesReplaced:) + name:@"EdgeStylesReplaced" + object:m]; + [[NSNotificationCenter defaultCenter] addObserver:self + selector:@selector(styleAdded:) + name:@"EdgeStyleAdded" + object:m]; + [[NSNotificationCenter defaultCenter] addObserver:self + selector:@selector(styleRemoved:) + name:@"EdgeStyleRemoved" + object:m]; + [[NSNotificationCenter defaultCenter] addObserver:self + selector:@selector(activeStyleChanged:) + name:@"ActiveEdgeStyleChanged" + object:m]; + + [styleManager release]; + styleManager = m; + + [self reloadStyles]; +} + +- (GtkWidget*) widget { + return GTK_WIDGET (view); +} + +- (BOOL) isLinkedToActiveStyle { + return linkedToActiveStyle; +} + +- (void) setLinkedToActiveStyle:(BOOL)linked { + linkedToActiveStyle = linked; + if (linkedToActiveStyle) { + EdgeStyle *style = [self selectedStyle]; + if ([styleManager activeEdgeStyle] != style) { + [self setSelectedStyle:[styleManager activeEdgeStyle]]; + } + } +} + +- (EdgeStyle*) selectedStyle { + GtkTreeSelection *sel = gtk_tree_view_get_selection (view); + GtkTreeIter iter; + + if (!gtk_tree_selection_get_selected (sel, NULL, &iter)) { + return nil; + } + + EdgeStyle *style = nil; + gtk_tree_model_get (GTK_TREE_MODEL (store), &iter, STYLES_PTR_COL, &style, -1); + + return style; +} + +- (void) setSelectedStyle:(EdgeStyle*)style { + GtkTreeSelection *sel = gtk_tree_view_get_selection (view); + + if (style == nil) { + gtk_tree_selection_unselect_all (sel); + return; + } + + GtkTreeModel *m = GTK_TREE_MODEL (store); + GtkTreeIter row; + if (gtk_tree_model_get_iter_first (m, &row)) { + do { + EdgeStyle *rowStyle; + gtk_tree_model_get (m, &row, STYLES_PTR_COL, &rowStyle, -1); + if (style == rowStyle) { + gtk_tree_selection_unselect_all (sel); + GtkTreePath *path = gtk_tree_model_get_path (m, &row); + gtk_tree_selection_select_path (sel, path); + gtk_tree_path_free (path); + // styleManager.activeStyle will be updated by the GTK+ callback + return; + } + } while (gtk_tree_model_iter_next (m, &row)); + } +} + +@end + +// }}} +// {{{ Notifications + +@implementation EdgeStyleSelector (Notifications) + +- (void) stylesReplaced:(NSNotification*)notification { + [self reloadStyles]; +} + +- (void) styleAdded:(NSNotification*)notification { + [self addStyle:[[notification userInfo] objectForKey:@"style"]]; +} + +- (void) styleRemoved:(NSNotification*)notification { + EdgeStyle *style = [[notification userInfo] objectForKey:@"style"]; + + GtkTreeModel *model = GTK_TREE_MODEL (store); + GtkTreeIter row; + if (gtk_tree_model_get_iter_first (model, &row)) { + do { + EdgeStyle *rowStyle; + gtk_tree_model_get (model, &row, STYLES_PTR_COL, &rowStyle, -1); + if (style == rowStyle) { + gtk_list_store_remove (store, &row); + [rowStyle release]; + return; + } + } while (gtk_tree_model_iter_next (model, &row)); + } +} + +- (void) activeStyleChanged:(NSNotification*)notification { + if (linkedToActiveStyle) { + EdgeStyle *style = [self selectedStyle]; + if ([styleManager activeEdgeStyle] != style) { + [self setSelectedStyle:[styleManager activeEdgeStyle]]; + } + } +} + +- (void) stylePropertyChanged:(NSNotification*)notification { + EdgeStyle *style = [notification object]; + + GtkTreeModel *model = GTK_TREE_MODEL (store); + GtkTreeIter row; + if (gtk_tree_model_get_iter_first (model, &row)) { + do { + EdgeStyle *rowStyle; + gtk_tree_model_get (model, &row, STYLES_PTR_COL, &rowStyle, -1); + if (style == rowStyle) { + if ([@"name" isEqual:[[notification userInfo] objectForKey:@"propertyName"]]) { + gtk_list_store_set (store, &row, STYLES_NAME_COL, [[style name] UTF8String], -1); + } else if (![@"scale" isEqual:[[notification userInfo] objectForKey:@"propertyName"]]) { + GdkPixbuf *pixbuf = [self pixbufOfEdgeInStyle:style]; + gtk_list_store_set (store, &row, STYLES_ICON_COL, pixbuf, -1); + gdk_pixbuf_unref (pixbuf); + } + } + } while (gtk_tree_model_iter_next (model, &row)); + } +} + +- (void) shapeDictionaryReplaced:(NSNotification*)n { + [self reloadStyles]; +} + +- (void) selectionChanged { + if (linkedToActiveStyle) { + EdgeStyle *style = [self selectedStyle]; + if ([styleManager activeEdgeStyle] != style) { + [styleManager setActiveEdgeStyle:style]; + } + } + [self postSelectedStyleChanged]; +} +@end + +// }}} +// {{{ Private + +@implementation EdgeStyleSelector (Private) +- (void) clearModel { + [self setSelectedStyle:nil]; + GtkTreeModel *model = GTK_TREE_MODEL (store); + GtkTreeIter row; + if (gtk_tree_model_get_iter_first (model, &row)) { + do { + EdgeStyle *rowStyle; + gtk_tree_model_get (model, &row, STYLES_PTR_COL, &rowStyle, -1); + [rowStyle release]; + } while (gtk_tree_model_iter_next (model, &row)); + } + gtk_list_store_clear (store); +} + +- (cairo_surface_t*) createEdgeIconSurface { + return cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 48, 18); +} + +- (GdkPixbuf*) pixbufOfEdgeInStyle:(EdgeStyle*)style { + cairo_surface_t *surface = [self createEdgeIconSurface]; + GdkPixbuf *pixbuf = [self pixbufOfEdgeInStyle:style usingSurface:surface]; + cairo_surface_destroy (surface); + return pixbuf; +} + +// Bring on GTK+3 and gdk_pixbuf_get_from_surface() +- (GdkPixbuf*) pixbufFromSurface:(cairo_surface_t*)surface { + cairo_surface_flush (surface); + + int width = cairo_image_surface_get_width (surface); + int height = cairo_image_surface_get_height (surface); + int stride = cairo_image_surface_get_stride (surface); + unsigned char *data = cairo_image_surface_get_data (surface); + + GdkPixbuf *pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, + TRUE, + 8, + width, + height); + unsigned char *pbdata = gdk_pixbuf_get_pixels (pixbuf); + int pbstride = gdk_pixbuf_get_rowstride (pixbuf); + + for (int y = 0; y < height; ++y) { + uint32_t *line = (uint32_t*)(data + y*stride); + unsigned char *pbline = pbdata + (y*pbstride); + for (int x = 0; x < width; ++x) { + uint32_t pixel = *(line + x); + unsigned char *pbpixel = pbline + (x*4); + // NB: We should un-pre-mult the alpha here. + // However, in our world, alpha is always + // on or off, so it doesn't really matter + pbpixel[3] = ((pixel & 0xff000000) >> 24); + pbpixel[0] = ((pixel & 0x00ff0000) >> 16); + pbpixel[1] = ((pixel & 0x0000ff00) >> 8); + pbpixel[2] = (pixel & 0x000000ff); + } + } + + return pixbuf; +} + +- (GdkPixbuf*) pixbufOfEdgeInStyle:(EdgeStyle*)style usingSurface:(cairo_surface_t*)surface { + Transformer *transformer = [Transformer defaultTransformer]; + [transformer setFlippedAboutXAxis:YES]; + + int width = cairo_image_surface_get_width (surface); + int height = cairo_image_surface_get_height (surface); + NSRect pixbufBounds = NSMakeRect(0.0, 0.0, width, height); + NSRect graphBounds = [transformer rectFromScreen:pixbufBounds]; + + NSPoint mid = NSMakePoint (NSMidX (graphBounds), NSMidY (graphBounds)); + NSPoint start = NSMakePoint (NSMinX (graphBounds) + 0.1f, mid.y); + NSPoint end = NSMakePoint (NSMaxX (graphBounds) - 0.1f, mid.y); + NSPoint midTan = NSMakePoint (mid.x + 0.1f, mid.y); + NSPoint leftNormal = NSMakePoint (mid.x, mid.y - 0.1f); + NSPoint rightNormal = NSMakePoint (mid.x, mid.y + 0.1f); + + CairoRenderContext *context = [[CairoRenderContext alloc] initForSurface:surface]; + [context clearSurface]; + + [context startPath]; + [context moveTo:[transformer toScreen:start]]; + [context lineTo:[transformer toScreen:end]]; + + switch ([style decorationStyle]) { + case ED_None: + break; + case ED_Tick: + [context moveTo:[transformer toScreen:leftNormal]]; + [context lineTo:[transformer toScreen:rightNormal]]; + break; + case ED_Arrow: + [context moveTo:[transformer toScreen:leftNormal]]; + [context lineTo:[transformer toScreen:midTan]]; + [context lineTo:[transformer toScreen:rightNormal]]; + break; + } + + [context setLineWidth:[style thickness]]; + [context strokePathWithColor:BlackRColor]; + + [context release]; + + return [self pixbufFromSurface:surface]; +} + +- (void) addStyle:(EdgeStyle*)style usingSurface:(cairo_surface_t*)surface { + GtkTreeIter iter; + gtk_list_store_append (store, &iter); + + GdkPixbuf *pixbuf = [self pixbufOfEdgeInStyle:style usingSurface:surface]; + gtk_list_store_set (store, &iter, + STYLES_NAME_COL, [[style name] UTF8String], + STYLES_ICON_COL, pixbuf, + STYLES_PTR_COL, (gpointer)[style retain], + -1); + gdk_pixbuf_unref (pixbuf); +} + +- (void) addStyle:(EdgeStyle*)style { + cairo_surface_t *surface = [self createEdgeIconSurface]; + [self addStyle:style usingSurface:surface]; + cairo_surface_destroy (surface); +} + +- (void) postSelectedStyleChanged { + [[NSNotificationCenter defaultCenter] postNotificationName:@"SelectedStyleChanged" object:self]; +} + +- (void) reloadStyles { + [self clearModel]; + for (EdgeStyle *style in [styleManager edgeStyles]) { + [self addStyle:style]; + } +} +@end + +// }}} +// {{{ GTK+ callbacks + +static void selection_changed_cb (GtkTreeSelection *sel, EdgeStyleSelector *mgr) { + NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; + [mgr selectionChanged]; + [pool drain]; +} +// }}} + +// vim:ft=objc:ts=8:et:sts=4:sw=4:foldmethod=marker + |