mirror of
git://projects.qi-hardware.com/eda-tools.git
synced 2024-11-26 13:53:09 +02:00
eeshow/: scroll wheel zooms
This commit is contained in:
Werner Almesberger
parent
15d434294d
commit
e2ff07457c
38
eeshow/cro.c
38
eeshow/cro.c
@ -303,21 +303,25 @@ static void *cr_pdf_init(int argc, char *const *argv)
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}
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static void end_common(struct cro_ctx *cc, int *w, int *h)
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static void end_common(struct cro_ctx *cc, int *w, int *h, int *x, int *y)
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{
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int x, y;
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int xmin, ymin;
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cairo_surface_destroy(cc->s);
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cairo_destroy(cc->cr);
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record_bbox(&cc->record, &x, &y, w, h);
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record_bbox(&cc->record, &xmin, &ymin, w, h);
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// fprintf(stderr, "%dx%d%+d%+d\n", *w, *h, x, y);
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cc->xo = -cd(cc, x);
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cc->yo = -cd(cc, y);
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// fprintf(stderr, "%dx%d%+d%+d\n", *w, *h, xmin, ymin);
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cc->xo = -cd(cc, xmin);
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cc->yo = -cd(cc, ymin);
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if (x)
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*x = xmin;
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if (y)
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*y = ymin;
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*w = cd(cc, *w);
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*h = cd(cc, *h);
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// fprintf(stderr, "%dx%d%+d%+d\n", *w, *h, x, y);
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// fprintf(stderr, "%dx%d%+d%+d\n", *w, *h, xmin, ymin);
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}
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@ -339,7 +343,7 @@ static void cr_png_end(void *ctx)
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struct cro_ctx *cc = ctx;
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int w, h;
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end_common(cc, &w, &h);
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end_common(cc, &w, &h, NULL, NULL);
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cc->s = cairo_image_surface_create(CAIRO_FORMAT_RGB24, w, h);
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cc->cr = cairo_create(cc->s);
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@ -380,7 +384,7 @@ static void cr_pdf_end(void *ctx)
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int w, h;
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unsigned i;
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end_common(cc, &w, &h);
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end_common(cc, &w, &h, NULL, NULL);
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if (cc->output_name)
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cc->s = cairo_pdf_surface_create(cc->output_name, w, h);
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@ -419,7 +423,7 @@ uint32_t *cro_img_end(struct cro_ctx *cc, int *w, int *h, int *stride)
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{
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uint32_t *data;
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end_common(cc, w, h);
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end_common(cc, w, h, NULL, NULL);
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*stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, *w);
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data = alloc_size(*stride * *h);
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@ -453,15 +457,16 @@ void cro_img_write(struct cro_ctx *cc, const char *name)
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}
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void cro_canvas_end(struct cro_ctx *cc)
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void cro_canvas_end(struct cro_ctx *cc, int *w, int *h, int *xmin, int *ymin)
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{
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int w, h;
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end_common(cc, &w, &h);
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end_common(cc, w, h, xmin, ymin);
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*w /= cc->scale;
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*h /= cc->scale;
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}
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void cro_canvas_draw(struct cro_ctx *cc, cairo_t *cr)
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void cro_canvas_draw(struct cro_ctx *cc, cairo_t *cr, int xo, int yo,
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float scale)
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{
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set_color(cr, COLOR_WHITE);
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cairo_paint(cr);
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@ -473,6 +478,9 @@ void cro_canvas_draw(struct cro_ctx *cc, cairo_t *cr)
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cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
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cc->cr = cr;
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cc->scale = scale;
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cc->xo = xo;
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cc->yo = yo;
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record_replay(&cc->record);
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}
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@ -34,7 +34,8 @@ extern const struct gfx_ops cro_pdf_ops;
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uint32_t *cro_img_end(struct cro_ctx *cc, int *w, int *h, int *stride);
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void cro_img_write(struct cro_ctx *cc, const char *name);
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void cro_canvas_end(struct cro_ctx *cc);
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void cro_canvas_draw(struct cro_ctx *cc, cairo_t *cr);
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void cro_canvas_end(struct cro_ctx *cc, int *w, int *h, int *xmin, int *ymin);
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void cro_canvas_draw(struct cro_ctx *cc, cairo_t *cr, int x, int y,
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float scale);
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#endif /* !CRO_H */
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218
eeshow/gui.c
218
eeshow/gui.c
@ -17,6 +17,8 @@
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* https://developer.gnome.org/gtk3/stable/gtk-migrating-2-to-3.html
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*/
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#include <stdio.h>
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#include <gtk/gtk.h>
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#include "cro.h"
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@ -26,17 +28,39 @@
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struct gui_ctx {
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GtkWidget *da;
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const struct sch_ctx *sch;
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struct cro_ctx *gfx_ctx;
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int w, h;
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int xmin, ymin;
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unsigned zoom; /* scale by 1.0 / (1 << zoom) */
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int x, y; /* center, in eeschema coordinates */
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bool panning;
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int pan_x, pan_y;
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} gui_ctx;
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/* ----- Rendering --------------------------------------------------------- */
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static gboolean on_draw_event(GtkWidget *widget, cairo_t *cr,
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gpointer user_data)
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{
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const struct gui_ctx *ctx = user_data;
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GtkAllocation alloc;
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cro_canvas_draw(ctx->gfx_ctx, cr);
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float f = 1.0 / (1 << ctx->zoom);
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int x, y;
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gtk_widget_get_allocation(ctx->da, &alloc);
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// x = -(ctx->xo - ctx->w / 2) * f - (ctx->x - alloc.width / 2);
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// y = -(ctx->yo - ctx->h / 2) * f - (ctx->y - alloc.height / 2);
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x = -(ctx->xmin + ctx->x) * f + alloc.width / 2;
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y = -(ctx->ymin + ctx->y) * f + alloc.height / 2;
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cro_canvas_draw(ctx->gfx_ctx, cr, x, y, f);
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return FALSE;
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}
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@ -48,35 +72,211 @@ static void render(struct gui_ctx *ctx)
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gfx_init(&cro_canvas_ops, 1, argv);
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sch_render(ctx->sch->sheets);
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cro_canvas_end(gfx_ctx);
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cro_canvas_end(gfx_ctx, &ctx->w, &ctx->h, &ctx->xmin, &ctx->ymin);
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ctx->gfx_ctx = gfx_ctx;
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ctx->x = ctx->w >> 1;
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ctx->y = ctx->h >> 1;
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// gfx_end();
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}
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/* ----- Tools ------------------------------------------------------------- */
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static void canvas_coord(const struct gui_ctx *ctx,
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int ex, int ey, int *x, int *y)
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{
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int sx, sy;
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GtkAllocation alloc;
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gtk_widget_get_allocation(ctx->da, &alloc);
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sx = ex - alloc.width / 2;
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sy = ey - alloc.height / 2;
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*x = (sx << ctx->zoom) + ctx->x;
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*y = (sy << ctx->zoom) + ctx->y;
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}
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/* ----- Panning ----------------------------------------------------------- */
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static void pan_begin(struct gui_ctx *ctx, int x, int y)
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{
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}
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static void pan_update(struct gui_ctx *ctx, int x, int y)
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{
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}
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static void pan_end(struct gui_ctx *ctx, int x, int y)
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{
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}
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/* ----- Zoom -------------------------------------------------------------- */
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static void zoom_in(struct gui_ctx *ctx, int x, int y)
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{
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if (ctx->zoom == 0)
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return;
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ctx->zoom--;
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ctx->x = (ctx->x + x) / 2;
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ctx->y = (ctx->y + y) / 2;
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gtk_widget_queue_draw(ctx->da);
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}
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static void zoom_out(struct gui_ctx *ctx, int x, int y)
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{
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if (ctx->w >> ctx->zoom <= 16)
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return;
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ctx->zoom++;
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ctx->x = 2 * ctx->x - x;
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ctx->y = 2 * ctx->y - y;
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gtk_widget_queue_draw(ctx->da);
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}
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/* ----- Event handlers ---------------------------------------------------- */
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static gboolean motion_notify_event(GtkWidget *widget, GdkEventMotion *event,
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gpointer data)
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{
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struct gui_ctx *ctx = data;
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int x, y;
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canvas_coord(ctx, event->x, event->y, &x, &y);
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// fprintf(stderr, "motion\n");
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pan_update(ctx, x, y);
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return TRUE;
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}
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static gboolean button_press_event(GtkWidget *widget, GdkEventButton *event,
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gpointer data)
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{
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struct gui_ctx *ctx = data;
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int x, y;
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canvas_coord(ctx, event->x, event->y, &x, &y);
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fprintf(stderr, "button press\n");
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switch (event->button) {
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case 1:
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case 2:
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pan_begin(ctx, x, y);
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break;
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case 3:
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;
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}
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return TRUE;
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}
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static gboolean button_release_event(GtkWidget *widget, GdkEventButton *event,
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gpointer data)
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{
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struct gui_ctx *ctx = data;
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int x, y;
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canvas_coord(ctx, event->x, event->y, &x, &y);
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fprintf(stderr, "button release\n");
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switch (event->button) {
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case 1:
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case 2:
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pan_end(ctx, x, y);
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break;
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case 3:
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;
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}
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return TRUE;
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}
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static gboolean key_press_event(GtkWidget *widget, GdkEventKey *event,
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gpointer data)
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{
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fprintf(stderr, "key %d\n", event->keyval);
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switch (event->keyval) {
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case GDK_KEY_q:
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gtk_main_quit();
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}
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return TRUE;
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}
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static gboolean scroll_event(GtkWidget *widget, GdkEventScroll *event,
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gpointer data)
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{
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struct gui_ctx *ctx = data;
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int x, y;
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canvas_coord(ctx, event->x, event->y, &x, &y);
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switch (event->direction) {
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case GDK_SCROLL_UP:
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zoom_in(ctx, x, y);
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break;
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case GDK_SCROLL_DOWN:
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zoom_out(ctx, x, y);
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break;
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default:
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/* ignore */;
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}
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return TRUE;
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}
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/* ----- Initialization ---------------------------------------------------- */
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int gui(struct sch_ctx *sch)
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{
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GtkWidget *window;
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GtkWidget *da;
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struct gui_ctx ctx = {
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.sch = sch,
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.zoom = 4, /* scale by 1 / 16 */
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.panning = 0,
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};
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render(&ctx);
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window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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da = gtk_drawing_area_new();
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gtk_container_add(GTK_CONTAINER(window), da);
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ctx.da = gtk_drawing_area_new();
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gtk_container_add(GTK_CONTAINER(window), ctx.da);
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g_signal_connect(G_OBJECT(da), "draw",
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g_signal_connect(G_OBJECT(ctx.da), "draw",
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G_CALLBACK(on_draw_event), &ctx);
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g_signal_connect(G_OBJECT(ctx.da), "motion_notify_event",
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G_CALLBACK(motion_notify_event), &ctx);
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g_signal_connect(G_OBJECT(ctx.da), "button_press_event",
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G_CALLBACK(button_press_event), &ctx);
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g_signal_connect(G_OBJECT(ctx.da), "button_release_event",
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G_CALLBACK(button_release_event), &ctx);
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g_signal_connect(G_OBJECT(ctx.da), "scroll_event",
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G_CALLBACK(scroll_event), &ctx);
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g_signal_connect(G_OBJECT(ctx.da), "key_press_event",
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G_CALLBACK(key_press_event), &ctx);
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g_signal_connect(window, "destroy",
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G_CALLBACK(gtk_main_quit), NULL);
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gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
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gtk_window_set_default_size(GTK_WINDOW(window), 400, 90);
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gtk_window_set_title(GTK_WINDOW(window), "GTK window");
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gtk_widget_set_can_focus(ctx.da, TRUE);
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gtk_widget_set_events(ctx.da,
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GDK_EXPOSE | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK |
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GDK_KEY_PRESS_MASK |
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GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
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GDK_SCROLL_MASK |
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GDK_POINTER_MOTION_MASK);
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// gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
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// gtk_window_set_default_size(GTK_WINDOW(window), 400, 90);
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gtk_window_set_title(GTK_WINDOW(window), "eeshow");
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gtk_widget_show_all(window);
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