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authorThomas White <taw@bitwiz.org.uk>2011-10-11 23:38:05 +0200
committerThomas White <taw@bitwiz.org.uk>2011-10-11 23:38:05 +0200
commit80224ffa532362f66e905ecf3b599fff17bb2e39 (patch)
treee9c531273e5be7c1739b696018f3d56832fbd0cf /src
parent920a213f5453ef9b904d8b90be37ec678b5c7055 (diff)
Design for general drag logic
Diffstat (limited to 'src')
-rw-r--r--src/mainwindow.c156
-rw-r--r--src/presentation.c1
-rw-r--r--src/presentation.h28
-rw-r--r--src/slide_render.c11
-rw-r--r--src/tool_select.c21
-rw-r--r--src/tool_text.c114
6 files changed, 231 insertions, 100 deletions
diff --git a/src/mainwindow.c b/src/mainwindow.c
index 6dc82a4..c74abd5 100644
--- a/src/mainwindow.c
+++ b/src/mainwindow.c
@@ -609,69 +609,6 @@ static gboolean key_press_sig(GtkWidget *da, GdkEventKey *event,
}
-static void start_drag_create(struct presentation *p, double x, double y)
-{
- p->start_corner_x = x;
- p->start_corner_y = y;
- p->create_dragging = 1;
-}
-
-
-static void drag_create(struct presentation *p, double x, double y)
-{
- p->drag_corner_x = x;
- p->drag_corner_y = y;
- redraw_overlay(p);
-}
-
-
-static void finish_drag_create(struct presentation *p, double x, double y)
-{
- p->drag_corner_x = x;
- p->drag_corner_y = y;
- p->create_dragging = 0;
- redraw_overlay(p);
- p->cur_tool->create_region(p->cur_tool, p,
- p->start_corner_x, p->start_corner_y,
- p->drag_corner_x, p->drag_corner_y);
-}
-
-
-static gboolean motion_sig(GtkWidget *da, GdkEventMotion *event,
- struct presentation *p)
-{
- switch ( p->drag_reason ) {
-
- case DRAG_REASON_NONE :
- /* If there was no reason before, now there is */
- p->drag_reason = DRAG_REASON_CREATE;
-
- /* Start the drag, and send the first drag event */
- start_drag_create(p, p->start_create_drag_x,
- p->start_create_drag_y);
- drag_create(p, event->x - p->border_offs_x,
- event->y - p->border_offs_y);
- break;
-
- case DRAG_REASON_MOVE :
- p->cur_tool->drag_object(p->cur_tool, p, p->editing_object,
- event->x - p->border_offs_x,
- event->y - p->border_offs_y);
- break;
-
- case DRAG_REASON_CREATE :
- drag_create(p, event->x - p->border_offs_x,
- event->y - p->border_offs_y);
-
- break;
-
- }
-
- gdk_event_request_motions(event);
- return FALSE;
-}
-
-
static gboolean button_press_sig(GtkWidget *da, GdkEventButton *event,
struct presentation *p)
{
@@ -685,23 +622,33 @@ static gboolean button_press_sig(GtkWidget *da, GdkEventButton *event,
if ( clicked == NULL ) {
+ /* Clicked no object. Deselect old object and set up for
+ * (maybe) creating a new one. */
+
if ( p->editing_object != NULL ) {
p->cur_tool->deselect(p->editing_object, p->cur_tool);
p->editing_object = NULL;
}
- p->start_create_drag_x = x;
- p->start_create_drag_y = y;
- p->drag_reason = DRAG_REASON_NONE;
+ p->start_corner_x = event->x - p->border_offs_x;
+ p->start_corner_y = event->y - p->border_offs_y;
+ p->drag_status = DRAG_STATUS_COULD_DRAG;
+ p->drag_reason = DRAG_REASON_CREATE;
} else {
- if ( p->editing_object != NULL ) {
+ /* If the clicked object is not the same as the previously
+ * selected one, deselect the old one. */
+ if ( p->editing_object != clicked ) {
p->cur_tool->deselect(p->editing_object, p->cur_tool);
+ p->editing_object = NULL;
}
- p->editing_object = clicked;
- p->cur_tool->click_select(p, p->cur_tool, x, y);
- p->drag_reason = DRAG_REASON_MOVE;
+ p->editing_object = clicked;
+ p->drag_status = DRAG_STATUS_NONE;
+ p->drag_reason = DRAG_REASON_NONE;
+ p->cur_tool->click_select(p, p->cur_tool, x, y, event,
+ &p->drag_status,
+ &p->drag_reason);
}
gtk_widget_grab_focus(GTK_WIDGET(da));
@@ -710,6 +657,41 @@ static gboolean button_press_sig(GtkWidget *da, GdkEventButton *event,
}
+static gboolean motion_sig(GtkWidget *da, GdkEventMotion *event,
+ struct presentation *p)
+{
+ if ( p->drag_status == DRAG_STATUS_COULD_DRAG ) {
+
+ /* We just got a motion signal, and the status was "could drag",
+ * therefore the drag has started. */
+ p->drag_status = DRAG_STATUS_DRAGGING;
+
+ }
+
+ switch ( p->drag_reason ) {
+
+ case DRAG_REASON_NONE :
+ break;
+
+ case DRAG_REASON_CREATE :
+ p->drag_corner_x = event->x - p->border_offs_x;
+ p->drag_corner_y = event->y - p->border_offs_y;
+ redraw_overlay(p);
+ break;
+
+ case DRAG_REASON_TOOL :
+ p->cur_tool->drag(p->cur_tool, p, p->editing_object,
+ event->x - p->border_offs_x,
+ event->y - p->border_offs_y);
+ break;
+
+ }
+
+ gdk_event_request_motions(event);
+ return FALSE;
+}
+
+
static gboolean button_release_sig(GtkWidget *da, GdkEventButton *event,
struct presentation *p)
{
@@ -718,22 +700,37 @@ static gboolean button_release_sig(GtkWidget *da, GdkEventButton *event,
x = event->x - p->border_offs_x;
y = event->y - p->border_offs_y;
- switch ( p->drag_reason ) {
+ /* Not dragging? Then I don't care. */
+ if ( p->drag_status != DRAG_STATUS_DRAGGING ) return FALSE;
+
+ p->drag_corner_x = x;
+ p->drag_corner_y = y;
+ p->drag_status = DRAG_STATUS_NONE;
+
+ switch ( p->drag_reason )
+ {
case DRAG_REASON_NONE :
- p->cur_tool->click_create(p, p->cur_tool, x, y);
+ printf("Release on pointless drag.\n");
break;
case DRAG_REASON_CREATE :
- finish_drag_create(p, x, y);
- break;
-
- case DRAG_REASON_MOVE :
- /* FIXME: Update presentation and other stuff? */
+ redraw_overlay(p);
+ p->cur_tool->create_region(p->cur_tool, p,
+ p->start_corner_x,
+ p->start_corner_y,
+ p->drag_corner_x,
+ p->drag_corner_y);
+ break;
+
+ case DRAG_REASON_TOOL :
+ p->cur_tool->end_drag(p->cur_tool, p, p->editing_object, x, y);
break;
}
+ p->drag_reason = DRAG_REASON_NONE;
+
gtk_widget_grab_focus(GTK_WIDGET(da));
redraw_overlay(p);
return FALSE;
@@ -771,7 +768,9 @@ static void draw_overlay(cairo_t *cr, struct presentation *p)
cairo_stroke(cr);
}
- if ( p->create_dragging ) {
+ if ( (p->drag_status == DRAG_STATUS_DRAGGING)
+ && (p->drag_reason == DRAG_REASON_CREATE) ) {
+
cairo_new_path(cr);
cairo_rectangle(cr, p->start_corner_x, p->start_corner_y,
p->drag_corner_x - p->start_corner_x,
@@ -779,6 +778,7 @@ static void draw_overlay(cairo_t *cr, struct presentation *p)
cairo_set_source_rgb(cr, 0.5, 0.5, 0.5);
cairo_set_line_width(cr, 0.5);
cairo_stroke(cr);
+
}
}
diff --git a/src/presentation.c b/src/presentation.c
index c66507d..b05ba4b 100644
--- a/src/presentation.c
+++ b/src/presentation.c
@@ -220,6 +220,7 @@ struct presentation *new_presentation()
new->editing_object = NULL;
new->completely_empty = 1;
+ new->drag_status = DRAG_STATUS_NONE;
new->ss = new_stylesheet();
diff --git a/src/presentation.h b/src/presentation.h
index a06fbc9..5b319ab 100644
--- a/src/presentation.h
+++ b/src/presentation.h
@@ -50,7 +50,15 @@ enum drag_reason
{
DRAG_REASON_NONE,
DRAG_REASON_CREATE,
- DRAG_REASON_MOVE,
+ DRAG_REASON_TOOL,
+};
+
+
+enum drag_status
+{
+ DRAG_STATUS_NONE,
+ DRAG_STATUS_COULD_DRAG,
+ DRAG_STATUS_DRAGGING,
};
@@ -59,13 +67,17 @@ struct toolinfo
void (*click_create)(struct presentation *p, struct toolinfo *tip,
double x, double y);
void (*click_select)(struct presentation *p, struct toolinfo *tip,
- double x, double y);
+ double x, double y, GdkEventButton *event,
+ enum drag_status *drag_status,
+ enum drag_reason *drag_reason);
void (*create_default)(struct presentation *p, struct style *sty,
struct toolinfo *tip);
void (*select)(struct object *o, struct toolinfo *tip);
int (*deselect)(struct object *o, struct toolinfo *tip);
- void (*drag_object)(struct toolinfo *tip, struct presentation *p,
- struct object *o, double x, double y);
+ void (*drag)(struct toolinfo *tip, struct presentation *p,
+ struct object *o, double x, double y);
+ void (*end_drag)(struct toolinfo *tip, struct presentation *p,
+ struct object *o, double x, double y);
void (*create_region)(struct toolinfo *tip, struct presentation *p,
double x1, double y1, double x2, double y2);
@@ -128,16 +140,14 @@ struct presentation
/* Tool status */
struct toolinfo *cur_tool;
- double drag_offs_x;
- double drag_offs_y;
- double start_create_drag_x;
- double start_create_drag_y;
- int create_dragging;
+
+ /* Rubber band boxes and related stuff */
double start_corner_x;
double start_corner_y;
double drag_corner_x;
double drag_corner_y;
enum drag_reason drag_reason;
+ enum drag_status drag_status;
unsigned int num_slides;
struct slide **slides;
diff --git a/src/slide_render.c b/src/slide_render.c
index 3c05f70..e68499a 100644
--- a/src/slide_render.c
+++ b/src/slide_render.c
@@ -82,9 +82,20 @@ void check_redraw_slide(struct slide *s)
void draw_editing_box(cairo_t *cr, double xmin, double ymin,
double width, double height)
{
+ const double dash[] = {2.0, 2.0};
+
cairo_new_path(cr);
cairo_rectangle(cr, xmin-5.0, ymin-5.0, width+10.0, height+10.0);
cairo_set_source_rgb(cr, 0.0, 0.69, 1.0);
cairo_set_line_width(cr, 0.5);
cairo_stroke(cr);
+
+ cairo_new_path(cr);
+ cairo_rectangle(cr, xmin, ymin, width, height);
+ cairo_set_dash(cr, dash, 2, 0.0);
+ cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+ cairo_set_line_width(cr, 0.1);
+ cairo_stroke(cr);
+
+ cairo_set_dash(cr, NULL, 0, 0.0);
}
diff --git a/src/tool_select.c b/src/tool_select.c
index c03ebd1..57e6721 100644
--- a/src/tool_select.c
+++ b/src/tool_select.c
@@ -51,18 +51,23 @@ static void click_create(struct presentation *p, struct toolinfo *tip,
static void click_select(struct presentation *p, struct toolinfo *tip,
- double x, double y)
+ double x, double y, GdkEventButton *event,
+ enum drag_status *drag_status,
+ enum drag_reason *drag_reason)
{
struct select_toolinfo *ti = (struct select_toolinfo *)tip;
struct object *clicked = p->editing_object;
ti->drag_offs_x = clicked->x - x;
ti->drag_offs_y = clicked->y - y;
+
+ *drag_status = DRAG_STATUS_COULD_DRAG;
+ *drag_reason = DRAG_REASON_TOOL;
}
-static void drag_object(struct toolinfo *tip, struct presentation *p,
- struct object *o, double x, double y)
+static void drag(struct toolinfo *tip, struct presentation *p,
+ struct object *o, double x, double y)
{
struct select_toolinfo *ti = (struct select_toolinfo *)tip;
double eright, ebottom;
@@ -85,6 +90,13 @@ static void drag_object(struct toolinfo *tip, struct presentation *p,
}
+static void end_drag(struct toolinfo *tip, struct presentation *p,
+ struct object *o, double x, double y)
+{
+ /* FIXME: Update projection or something? */
+}
+
+
static void create_region(struct toolinfo *tip, struct presentation *p,
double x1, double y1, double x2, double y2)
{
@@ -136,7 +148,8 @@ struct toolinfo *initialise_select_tool()
ti->base.create_default = NULL;
ti->base.select = select_object;
ti->base.deselect = deselect_object;
- ti->base.drag_object = drag_object;
+ ti->base.drag = drag;
+ ti->base.end_drag = end_drag;
ti->base.create_region = create_region;
ti->base.draw_editing_overlay = draw_overlay;
ti->base.key_pressed = key_pressed;
diff --git a/src/tool_text.c b/src/tool_text.c
index a7f27c2..4af8b8e 100644
--- a/src/tool_text.c
+++ b/src/tool_text.c
@@ -37,10 +37,24 @@
#include "slide_render.h"
+enum text_drag_reason
+{
+ TEXT_DRAG_REASON_NONE,
+ TEXT_DRAG_REASON_RESIZE,
+};
+
+
struct text_toolinfo
{
- struct toolinfo base;
- PangoContext *pc;
+ struct toolinfo base;
+ PangoContext *pc;
+ enum text_drag_reason drag_reason;
+ double box_x;
+ double box_y;
+ double box_width;
+ double box_height;
+ double drag_offset_x;
+ double drag_offset_y;
};
@@ -446,17 +460,48 @@ static void click_create(struct presentation *p, struct toolinfo *tip,
static void click_select(struct presentation *p, struct toolinfo *tip,
- double x, double y)
+ double x, double y, GdkEventButton *event,
+ enum drag_status *drag_status,
+ enum drag_reason *drag_reason)
{
int xp, yp;
+ double xo, yo;
gboolean v;
+ struct text_toolinfo *ti = (struct text_toolinfo *)tip;
struct text_object *o = (struct text_object *)p->editing_object;
int idx, trail;
assert(o->base.type == TEXT);
- xp = (x - o->base.x + o->offs_x)*PANGO_SCALE;
- yp = (y - o->base.y + o->offs_y)*PANGO_SCALE;
+ xo = x - o->base.x; yo = y - o->base.y;
+
+ /* Within the resizing region? */
+ if ( (xo > o->base.bb_width - 20.0) && (yo > o->base.bb_height - 20.0) )
+ {
+ double cx, cy;
+
+ ti->drag_reason = TEXT_DRAG_REASON_RESIZE;
+
+ /* Initial size of rubber band box */
+ ti->box_x = o->base.x; ti->box_y = o->base.y;
+ ti->box_width = o->base.bb_width;
+ ti->box_height = o->base.bb_height;
+
+ /* Coordinates of the bottom right corner */
+ cx = o->base.x + o->base.bb_width;
+ cy = o->base.y + o->base.bb_height;
+
+ ti->drag_offset_x = x - cx;
+ ti->drag_offset_y = y - cy;
+
+ /* Tell the MCP what we did, and return */
+ *drag_status = DRAG_STATUS_DRAGGING;
+ *drag_reason = DRAG_REASON_TOOL;
+ return;
+ }
+
+ xp = (xo + o->offs_x)*PANGO_SCALE;
+ yp = (yo + o->offs_y)*PANGO_SCALE;
v = pango_layout_xy_to_index(o->layout, xp, yp, &idx, &trail);
@@ -465,10 +510,37 @@ static void click_select(struct presentation *p, struct toolinfo *tip,
}
-static void drag_object(struct toolinfo *tip, struct presentation *p,
- struct object *o, double x, double y)
+static void drag(struct toolinfo *tip, struct presentation *p,
+ struct object *o, double x, double y)
{
- /* Do nothing */
+ struct text_toolinfo *ti = (struct text_toolinfo *)tip;
+
+ ti->box_width = x - ti->drag_offset_x - ti->box_x;
+ ti->box_height = y - ti->drag_offset_y - ti->box_y;
+ if ( ti->box_width < 20.0 ) ti->box_width = 20.0;
+ if ( ti->box_height < 20.0 ) ti->box_height = 20.0;
+
+ redraw_overlay(p);
+}
+
+
+static void end_drag(struct toolinfo *tip, struct presentation *p,
+ struct object *o, double x, double y)
+{
+ struct text_toolinfo *ti = (struct text_toolinfo *)tip;
+
+ ti->box_width = x - ti->drag_offset_x - ti->box_x;
+ ti->box_height = y - ti->drag_offset_y - ti->box_y;
+ if ( ti->box_width < 20.0 ) ti->box_width = 20.0;
+ if ( ti->box_height < 20.0 ) ti->box_height = 20.0;
+
+ o->bb_width = ti->box_width;
+ o->bb_height = ti->box_height;
+ update_text((struct text_object *)o);
+ o->parent->object_seq++;
+
+ ti->drag_reason = TEXT_DRAG_REASON_NONE;
+ redraw_overlay(p);
}
@@ -524,10 +596,33 @@ static int deselect_object(struct object *o, struct toolinfo *tip)
static void draw_overlay(struct toolinfo *tip, cairo_t *cr, struct object *o)
{
+ struct text_toolinfo *ti = (struct text_toolinfo *)tip;
+
if ( o != NULL ) {
+
draw_editing_box(cr, o->x, o->y, o->bb_width, o->bb_height);
+
+ cairo_new_path(cr);
+ cairo_rectangle(cr, o->x+o->bb_width-20.0,
+ o->y+o->bb_height-20.0, 20.0, 20.0);
+ cairo_set_source_rgba(cr, 0.9, 0.9, 0.9, 0.2);
+ cairo_fill(cr);
+
draw_caret(cr, o);
}
+
+ if ( ti->drag_reason == TEXT_DRAG_REASON_RESIZE ) {
+
+ /* FIXME: Use common draw_rubberband_box() routine */
+ cairo_new_path(cr);
+ cairo_rectangle(cr, ti->box_x, ti->box_y,
+ ti->box_width, ti->box_height);
+ cairo_set_source_rgb(cr, 0.5, 0.5, 0.5);
+ cairo_set_line_width(cr, 0.5);
+ cairo_stroke(cr);
+
+ }
+
}
@@ -572,7 +667,8 @@ struct toolinfo *initialise_text_tool(GtkWidget *w)
ti->base.create_default = create_default;
ti->base.select = select_object;
ti->base.deselect = deselect_object;
- ti->base.drag_object = drag_object;
+ ti->base.drag = drag;
+ ti->base.end_drag = end_drag;
ti->base.create_region = create_region;
ti->base.draw_editing_overlay = draw_overlay;
ti->base.key_pressed = key_pressed;