neocturne/neofx-zoomedit
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zoomedit: RenderArea has a grid and can zoom now.

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This commit is contained in:
neoraider 2008-04-08 21:16:03 +00:00
parent 761c681764
commit 67f1708076
3 changed files with 158 additions and 23 deletions
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128
src/Gui/RenderArea.cpp
View file

@ -1,6 +1,8 @@
#include "RenderArea.h"
#include <iostream>
#include <cstdlib>
#include <cmath>
#include <gtkmm/toolbutton.h>
#include <GL/gl.h>
namespace ZoomEdit {
@ -9,7 +11,7 @@ namespace Gui {
GdkGLConfig *RenderArea::glconfig = NULL;
RenderArea::RenderArea(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade::Xml> &xml)
: Gtk::DrawingArea(cobject) {
: Gtk::DrawingArea(cobject), zoomLevel(0), scale(100), x(0), y(0) {
if(!glconfig) {
glconfig = gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGB | GDK_GL_MODE_DOUBLE));
if(!glconfig) glconfig = gdk_gl_config_new_by_mode(GDK_GL_MODE_RGB); // Hmm, can't find double buffered config
@ -20,19 +22,24 @@ RenderArea::RenderArea(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade:
}
signal_realize().connect(sigc::mem_fun(this, &RenderArea::onRealize));
signal_configure_event().connect(sigc::mem_fun(this, &RenderArea::onConfigureEvent));
signal_expose_event().connect(sigc::mem_fun(this, &RenderArea::onExposeEvent));
signal_scroll_event().connect(sigc::mem_fun(this, &RenderArea::onScrollEvent));
Gtk::ToolButton *button;
xml->get_widget("ToolButtonZoomIn", button);
if(button)
button->signal_clicked().connect(sigc::bind(sigc::mem_fun(this, &RenderArea::zoom), 2, 0.5f, 0.5f));
xml->get_widget("ToolButtonZoomOut", button);
if(button)
button->signal_clicked().connect(sigc::bind(sigc::mem_fun(this, &RenderArea::zoom), -2, 0.5f, 0.5f));
gtk_widget_set_gl_capability(GTK_WIDGET(cobject), glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE);
}
RenderArea::~RenderArea() {
}
void RenderArea::onRealize() {
GtkWidget *widget = GTK_WIDGET(gobj());
GdkGLContext *context = gtk_widget_get_gl_context(widget);
GdkGLDrawable *drawable = gtk_widget_get_gl_drawable(widget);
if(!gdk_gl_drawable_gl_begin(drawable, context))
if(!gdkGLBegin())
return;
glClearColor(0, 0, 0, 0);
@ -46,7 +53,108 @@ void RenderArea::onRealize() {
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gdk_gl_drawable_gl_end(drawable);
gdkGLEnd();
}
bool RenderArea::onConfigureEvent(GdkEventConfigure *event) {
updateViewport();
return true;
}
bool RenderArea::onExposeEvent(GdkEventExpose *event) {
if(!gdkGLBegin())
return false;
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glScalef(scale, scale, 1);
glTranslatef(-x, -y, 0);
drawGrid();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
gdkSwapBuffers();
gdkGLEnd();
return true;
}
bool RenderArea::onScrollEvent(GdkEventScroll *event) {
switch(event->direction) {
case GDK_SCROLL_UP:
zoom(1, event->x/get_width(), event->y/get_height());
return true;
case GDK_SCROLL_DOWN:
zoom(-1, event->x/get_width(), event->y/get_height());
return true;
default:
return false;
}
}
void RenderArea::zoom(int zoom, float x, float y) {
zoomLevel = std::max(std::min(zoomLevel + zoom, 50), -100);
scale = 100*std::pow(1.1f, zoomLevel);
queue_draw();
}
void RenderArea::updateViewport() {
if(!gdkGLBegin())
return;
glViewport(0, 0, get_width(), get_height());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(get_width() != 0 && get_height() != 0)
glScalef(2.0f/get_width(), -2.0f/get_height(), 1);
gdkGLEnd();
queue_draw();
}
void RenderArea::drawGrid() {
float depth = std::log10(scale)-0.75f;
float depth2 = std::floor(depth);
float step = std::pow(0.1f, depth2);
float f;
int i;
float x1 = x-get_width()/(2*scale), y1 = y-get_height()/(2*scale);
float x2 = x+get_width()/(2*scale), y2 = y+get_height()/(2*scale);
glLineWidth(1.0f);
glBegin(GL_LINES);
for(i = 0; 0.4f*(depth-depth2+i-1) < 0.5f; i++) {
f = std::min(0.4f*(depth-depth2+i), 0.5f);
glColor3f(f, f, f);
for(f = x1 - std::fmod(x1, step) - step; f <= x2; f+=step) {
glVertex2f(f, y1);
glVertex2f(f, y2);
}
for(f = y1 - std::fmod(y1, step) - step; f <= y2; f+=step) {
glVertex2f(x1, f);
glVertex2f(x2, f);
}
step *= 10;
}
glEnd();
}
}

29
src/Gui/RenderArea.h
View file

@ -11,12 +11,39 @@ namespace Gui {
class RenderArea : public Gtk::DrawingArea {
public:
RenderArea(BaseObjectType *cobject, const Glib::RefPtr<Gnome::Glade::Xml> &xml);
virtual ~RenderArea();
private:
static GdkGLConfig *glconfig;
float x, y;
int zoomLevel;
float scale;
void onRealize();
bool onConfigureEvent(GdkEventConfigure *event);
bool onExposeEvent(GdkEventExpose *event);
bool onScrollEvent(GdkEventScroll *event);
void zoom(int zoom, float x = 0.5f, float y = 0.5f);
void updateViewport();
void drawGrid();
bool gdkGLBegin() {
GtkWidget *widget = GTK_WIDGET(gobj());
return gdk_gl_drawable_gl_begin(gtk_widget_get_gl_drawable(widget), gtk_widget_get_gl_context(widget));
}
void gdkSwapBuffers() {
gdk_gl_drawable_swap_buffers(gtk_widget_get_gl_drawable(GTK_WIDGET(gobj())));
}
void gdkGLEnd() {
gdk_gl_drawable_gl_end(gtk_widget_get_gl_drawable(GTK_WIDGET(gobj())));
}
};
}

22
zoomedit.glade
View file

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE glade-interface SYSTEM "glade-2.0.dtd">
<!--Generated with glade3 3.4.3 on Sun Apr 6 23:07:46 2008 -->
<!--Generated with glade3 3.4.0 on Tue Apr 8 21:03:00 2008 -->
<glade-interface>
<widget class="GtkWindow" id="WindowMain">
<property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
@ -170,7 +170,7 @@
<property name="visible">True</property>
<property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
<child>
<widget class="GtkToolButton" id="toolbutton1">
<widget class="GtkToolButton" id="ToolButtonZoomIn">
<property name="visible">True</property>
<property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
<property name="stock_id">gtk-zoom-in</property>
@ -180,7 +180,7 @@
</packing>
</child>
<child>
<widget class="GtkToolButton" id="toolbutton2">
<widget class="GtkToolButton" id="ToolButtonZoomOut">
<property name="visible">True</property>
<property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
<property name="stock_id">gtk-zoom-out</property>
@ -210,16 +210,10 @@
<placeholder/>
</child>
<child>
<widget class="GtkHScrollbar" id="Hscrollbar">
<widget class="GtkDrawingArea" id="RenderArea">
<property name="visible">True</property>
<property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
<property name="adjustment">0 0 100 1 10 10</property>
</widget>
<packing>
<property name="top_attach">1</property>
<property name="bottom_attach">2</property>
<property name="y_options"></property>
</packing>
</child>
<child>
<widget class="GtkVScrollbar" id="Vscrollbar">
@ -234,10 +228,16 @@
</packing>
</child>
<child>
<widget class="GtkDrawingArea" id="RenderArea">
<widget class="GtkHScrollbar" id="Hscrollbar">
<property name="visible">True</property>
<property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
<property name="adjustment">0 0 100 1 10 10</property>
</widget>
<packing>
<property name="top_attach">1</property>
<property name="bottom_attach">2</property>
<property name="y_options"></property>
</packing>
</child>
</widget>
<packing>